A SIMULATION STUDY ON SPACE-TIME EQUALIZATION FOR MOBILE BROADBAND COMMUNICATION IN AN INDUSTRIAL INDOOR ENVIRONMENT

Save this PDF as:

Size: px
Start display at page:

Download "A SIMULATION STUDY ON SPACE-TIME EQUALIZATION FOR MOBILE BROADBAND COMMUNICATION IN AN INDUSTRIAL INDOOR ENVIRONMENT"

Transcription

1 A SIMULATION STUDY ON SPACE-TIME EQUALIZATION FOR MOBILE BROADBAND COMMUNICATION IN AN INDUSTRIAL INDOOR ENVIRONMENT U. Trautwein, G. Sommerkorn, R. S. Thomä FG EMT, Ilmenau University of Technology P.O.B. 565, D Ilmenau, Germany Phone: Fax: WWW: Abstract - Linear space-time equalization is shown to be effective in coping with the complicated propagation conditions for wireless broadband communication in an industrial indoor environment. This is demonstrated by realistic simulations that use real channel measurement data obtained from a vector channel sounder for modeling the influence of the radio channel. The system parameters are similar to the HIPERLAN/ standard of ETSI with a data rate of about 24 Msym/s and a carrier frequency of 5.2 GHz. I. INTRODUCTION The design of new broadband wireless communication systems requires special attention to the propagation conditions of the application scenario. Industrial indoor environments like large factory halls show typically a complicated radio channel because of the presence of many reflecting objects. This results in wide delay spreads and a considerably changing channel for a moving mobile unit. There exists a number of options to overcome the difficulties of heavy multipath propagation. Besides the choice of a robust modulation scheme the use of adaptive antenna arrays is frequently proposed because of their ability for improving the radio channel by exploiting its directional dimension. This paper investigates the potential of a particular implementation of an adaptive antenna, an MMSE space-time equalizer [3], for a wireless LAN system in an industrial environment. The system parameters have been chosen similar to the HIPERLAN/ standard of ETSI [2] for HIgh PERformance Radio LAN s that employs a single-carrier TDMA transmission scheme with a symbol rate of about 24 Msym/s. The performance of receivers with different numbers of antennas and equalizer memory lengths has been determined by link-level simulations. A crucial point for reasonable simulation results is the application of a realistic radio channel model. For adaptive antenna array simulations this model has to be directional. When the mobiles are moving through complex scenarios the model should be able to represent the time-varying as well as the non-stationary characteristics of the channel. Although a number of channel models have been proposed in the literature [6] there exists no appropriate directional channel model for industrial scenarios. As an alternative it is possible to insert measured impulse responses in the simulation. Of course, this requires special measurement equipment. This is available with the RUSK ATM vector channel sounder [4]. A measurement campaign has been carried out in a car factory hall of DaimlerChrysler (Germany). The measured and preprocessed vector impulse responses have been applied for this study. Section II describes the measurement device for vector channel sounding, section III gives an overview of the characteristics of the measured impulse responses, section IV describes the simulation setup, and section V shows results of the simulations. II. VECTOR CHANNEL SOUNDING The RUSK ATM channel sounder is able to measure the time-variant vector impulse response between one omnidirectional transmit antenna (located at the mobile) and an 8 element uniform linear patch antenna array with a bandwidth of 2 MHz at carrier frequencies of 5 6 GHz. The radio channel is excited by a periodic multifrequency sounding signal which is generated at baseband by an arbitrary waveform generator and afterwards up-converted to RF and radiated with a power of 27 dbm. The period has to be chosen according to the expected maximum delay of the channel. Values of s are possible. Transmitter and receiver are synchronized either by a cable connection or by two synchronous rubidium frequency references, thus allowing the measurement of the complex baseband impulse responses. Fast antenna multiplexing is employed at the receiver to limit the hardware costs to one RF receive channel for all 8 receive antennas. After the down-conversion to an intermediate frequency of 8 MHz the signal is digitized and digital signal processing is used for IQ demodulation and correlation processing to calcu-

2 late the impulse responses. The delay resolution of the individual multipath components is in the range of 8 5 ns which corresponds to m path length and depends on the type of a frequency window which is applied for enhanced sidelobe suppression in the impulse responses. The dynamic range of the impulse responses is approximately 35 db. The measurement repetition rate (the sampling rate of the impulse responses in time) can be set in a wide range up to 78 khz. This rate has to be chosen according to the expected maximum Doppler shift of the channel. Then, the measurement data completely represent the time-variant channel statistics. Due to hardware limitations there exists a mutual dependency of this sampling rate and the maximum number of consecutive impulse responses that can be recorded, e.g., at khz sampling rate a record length of 7 s can be achieved. [db] Azimuth [ ] III. CHANNEL CHARACTERIZATION The measurements within the car factory hall of DaimlerChrysler comprise impulse responses for a number of fixed s of the transmitter (Tx) as well as for a drive through the hall. The distances to the receiver (Rx) were in the range of 5 to 2 m. Line-of-sight (LOS) as well as non line-of-sight (NLOS) situations have been considered. The path loss ranges from 5 8 db. The rms delay spread is in the range from 3 ns for LOS situations up to 6 ns for NLOS situations, which corresponds to 4 symbol periods for the simulated 24 MSym/s system. Knowledge about the angular characteristics of the channel is especially important for adaptive antenna array systems. The delay-azimuth spectrum has been determined from the measurement data by high resolution direction of arrival estimation [5]. For distant LOS locations the multipath components arrive from a significantly smaller angular segment than for close LOS locations or NLOS locations (Fig. ). The values for the path loss, rms delay spread, and rms angular spread for 5 different s in the hall, approx. separated by m each, are given in Fig. 7. The change from the LOS to NLOS situations (around 68) are clearly visible by a strong increase in path loss and delay spread values. The measurement repetition interval was set to 5.2 ms which allows a measurable Doppler bandwidth of up to 95 Hz. This means at the utilized carrier frequency of 5.2 GHz that the total path length may change with a speed of maximally 5.6 m/s. Fig. 2 shows a typical average Doppler spectrum and an average delay spectrum calculated from the impulse responses during a drive of a length of 7 cm (2 wavelengths at 5.2 GHz) in a NLOS situation. This part has also been used for the dynamic transmission simulations in the next section. Clearly visible is the main peak at a Doppler frequency of 32 Hz which corresponds to the speed of the mobile of.8 m/s. For the fixed measurement locations no significant Doppler spread has been observed, indicating that multipath components from the moving objects present in the scenario are negli- [db] Azimuth [ ] Fig. : Delay-azimuth spectrum for a distant LOS (top) and a NLOS (bottom) gible. This has the consequence that it is possible to simulate a faster speed of motion than the real speed during the measurement simply by assuming a higher time sampling rate for the impulse responses. IV. Approach SIMULATION SETUP The influence of the channel on the transmit signal can be modeled by FIR filtering. For an array receiver a separate set of filter coefficients for each antenna element is required. For this paper two kinds of link-level simulations have been performed. For fixed Tx locations static simulations assume the impulse response to be time-invariant. Magnitude [db] Doppler frequency [Hz] Magnitude [db] Fig. 2: Average Doppler spectrum (left) and average delay spectrum (right) for a measurement drive

3 For a moving Tx a sequence of measured vector impulse responses is used for dynamic simulations. This is possible due to the real-time capabilities of the RUSK ATM vector channel sounder. Thereby the preprocessed impulse responses act as coefficients of time-varying FIR filters. This allows to investigate the behavior and performance of different receiver structures as if they are facing the particular conditions of the radio channel during the measurement. This is advantageous for the optimization of the receiver s signal processing when an appropriate vector channel model is not available for complex scenarios. gain relative timing [samples] Real Imag For both kinds of simulation a preprocessing of the measurement data is necessary to suit the sampling rates of the measurement to the sampling rates of the simulated system. The measurement data files of the DaimlerChrysler scenario consist of 92 complex frequency samples within the 2 MHz measurement bandwidth at an impulse response length of.6 s. The simulations have been performed at waveform level with 4 times oversampling w.r.t. the symbol rate of Msym/s (4.83 ns symbol period). The selection of 53 consecutive frequency samples at the desired carrier frequency realizes the accommodation to the sampling rate of the simulation. Then the impulse responses are calculated by means of an inverse FFT. For reducing the computational burden of the simulation it is advantageous to reduce the number of taps of the FIR filters to the effective delay window of the impulse responses, which is the part of the impulse response containing the most energy. Here, due to relatively large delay spreads, the required number of taps is 7 9 ( ns). This introduces intersymbol interference (ISI) up to 7 23 symbols. The measurement rate is set according to the maximum expected Doppler shift, thus fully representing the timevariance of the impulse responses. For the dynamic simulations it has to be increased according to the simulation sampling rate by some interpolation procedures. Here, the required interpolation factor is very high (4896 for original speed). To reduce the computations a two stage interpolation has been implemented for the system. The st stage consists of an FIR lowpass interpolator with a stopband attenuation of 7 db. It increases the sampling rate by a factor of 5. The further increase in sampling rate is achieved by linear interpolation, which has shown to yield sufficient accuracy. It has been verified by experiment that for the given data rates and burst durations even a th order interpolation (hold) does not yield significant differences in the simulation results. The Implemented System The system parameters for the simulations have been chosen similar to the HIPERLAN/ standard of ETSI. The frame structure consists of a training sequence (45 bits) and a variable number (...47) of data packets (496 bits) Fig. 3: Synchronization values from the correlation unit For this paper a continuous transmission of frames, separated by a guard interval of 2 bits, has been simulated. Contrary to the standard, BPSK modulation with an excess bandwidth of 5 % has been used instead of GMSK. The transmit signal is generated and processed with 4 times oversampling w.r.t. the symbol rate. The receiver filters are FIR lowpass filters. The optimum symbol timing for sampling at the receiver is obtained by a correlation unit that finds the maximum correlation between the known training sequence (spectrally white) and the receive signal (Fig. 3 top). The value of the correlation function at this instant is used to determine a complex gain factor (Fig. 3 bottom) to adjust the amplitude and phase of the incoming signal once per burst, thus enabling the use of coherent detection. Clearly, the results of the correlation unit will be imperfect due to noise and ISI (like it is in reality), but the influence on the results is found to be weak. Different receiver configurations have been investigated, consisting of, 2, 4, and 8 array channels in combination with linear T/2-spaced space-time equalizers of different memory lengths (Fig. 4). This means, each receiver channel possesses a number of equalizer taps that are jointly adapted during the training phase, and the output signals of all equalizers are summed to form the signal for the detection of the data symbols. The recursive least squares (RLS) algorithm has been used for the adaptation, which minimizes the mean square error (MMSE criterion) between the output signal of the equalizer and the training sequence [3]. It is especially suitable for mobile communication applications because of its fast convergence []. After the training phase the equalizer taps are held constant for the duration of the burst. The fractionally-spaced structure was chosen because it does not need matched filters at the input and is not sensitive to sampling phase errors [7]. This eases synchronization because the timing phase could be different for all array outputs.

4 w, w,2 w,3 w,m output close LOS distant LOS distant NLOS w 2, w 2,2 w 2,3 w 2,M t=nt mean bit error rate 2 3 w N, w N,2 w N,3 w N,M weight adaptation 4 t=nt/2 Fig. 4: Structure of the space-time equalizer in the complex baseband..8 Prob{BER > } Prob{BER > 2 } Prob{BER > 3 } 5 Fig. 6: Mean BERs for different Tx/Rx constellations (SNR= db) probability * 45 4 * 5 8 * 3.2 mean bit error rate 3 4 Fig. 5: Outage probabilities (SNR= db). V. RESULTS With the system described above the raw bit error rate (BER) performance has been determined by Monte Carlo simulations for static as well as dynamic channel conditions. With time-invariant impulse responses it is possible to see whether a particular receiver can cope with the propagation conditions at many locations within the hall. The dynamic simulation can be used to verify the behavior of the receiver during the motion of the transmitter. This shows whether tracking is necessary over the burst duration, what is an appropriate maximum burst length, how is the influence of the fast fading, or whether a particular adaptation algorithm is suitable. Static Transmissions Temporal equalization is a must for the given scenario and system parameters because of strong intersymbol interference (ISI). Beamforming only improves the reception but is not sufficient. This can be concluded from Figs. 5, 6, and 7. An important factor for the effectiveness of linear equalization is the signal to noise ratio (SNR). For the presented simulations a constant SNR at all locations has been adjusted which is equivalent to an ideal power control. For low SNR values a significant performance gain can be path loss [db] delay spread [ns] angular spread [ ] Fig. 7: Characterization of different transmitter locations in terms of (i) bit error rates for 3 receiver configurations (missing bars for BER ) at SNR db, (ii) path loss, (iii) delay spread, and (iv) angular spread (from top).

5 * 2 * 5 4 * 5 8 * 3 bit error rate 2 4 bit error rate Fig. 8: Mean bit error rates during the drive (NLOS) Fig. 9: Instantaneous bit error rates during the drive achieved by the use of multiple antennas. This is expected because the antenna gain effectively increases the SNR. On the other hand, this performance gain could be replaced to some extent by a longer equalizer plus a higher transmit power. Even an equalizer with many taps leaves some critical locations which leads to a coverage problem (Fig. 7). It is also visible that performance gains are possible that are beyond the pure SNR enhancement capability of an array receiver, meaning that the space-time equalizer achieves ISI reduction by suppressing multipath components with delays exceeding the equalizer memory length. Fig. 5 shows the probabilities that the BER exceeds a certain threshold at the different locations. This is useful for determining the coverage with a given quality of the radio link. Dynamic Transmissions The simulations with a moving transmitter (.8 m/s) in NLOS situations use burst lengths with or 4 data packets, resp., which yields burst durations of.23 ms or.85 ms. For the assumed burst durations there is no significant BER degradation towards the end of the burst without any tracking over the burst. This is remarkable because on the other hand the optimum sampling time as calculated by the correlation unit makes jumps of more than 5 symbol periods from burst to burst (Fig. 3). This means that the length of the main propagation path changes considerably over very small distances. Fig. 8 shows the mean BERs for different receiver complexities for the drive in a NLOS scenario. Again it indicates that without at least short temporal equalization component no sufficient performance can be achieved. Fig. 9 gives examples of instantaneous BER curves. These results can be used to derive the temporal BER statistics of a radio link which in turn can be used, e.g., to optimize coding, interleaving, and also network protocols. VI. CONCLUSIONS AND OUTLOOK It has been shown that linear space-time equalization is an effective mean for combating the strong ISI present at broadband communications in an industrial scenario. A further aspect of space-time equalizers has been omitted in this study so far, their capability for interference reduction of co-channel and adjacent channel interferences. It is possible to use the same approach also for the investigation of this problem. Thereby the signals of co- and adjacent channel users are processed by FIR filters measured at different locations of the environment. Furthermore it is of interest to test more advanced algorithms, such as nonlinear equalizers. The derivation of relations between channel parameters and the necessary receiver complexity requires more investigations and the evaluation of more measurement data. ACKNOWLEDGMENTS This work is partially supported by the German Federal Ministry of Education, Science, Research, and Technology under the project line ATMmobil. The authors are grateful to MEDAV GmbH for cooperation in designing the channel sounder and to Dr. Aldinger (DaimlerChrysler) for cooperation in the field measurement. REFERENCES () J. Fuhl, A. F. Molisch, Space Domain Equalisation for Second and Third Generation Mobile Radio Systems, 2. ITG-Fachtagung Mobile Kommunikation, Neu-Ulm, Germany, pp , Sep (2) ETSI (ETS 3 652), Radio Equipment and Systems, HIPERLAN Type, Functional specification, Oct (3) A. J. Paulraj, B. C. Ng, Space-Time Modems for Wireless Personal Communications, IEEE Pers. Comm., pp , Feb (4) U. Trautwein, K. Blau, D. Brückner, F. Herrmann, A. Richter, G. Sommerkorn, R. Thomä, Radio Channel Measurement for Realistic Simulation of Adaptive Antenna Arrays, Proc. 2nd European Personal Mobile Communications Conference, pp , Sep (5) R. S. Thomä, D. Hampicke, A. Richter, G. Sommerkorn, A. Schneider, U. Trautwein, Identification of Time-Variant Directional Mobile Radio Channels, Proc. IEEE Instrumentation and Measurement Conference, May 999. (6) G.Raleigh, S. N. Diggavi, A. F. Naguib, A. Paulraj, Characterization of Fast Fading Vector Channels for Multi- Antenna Communication Systems, IEEE Asilomar Conf. on Signals, Computers and Systems, pp , 994. (7) J. G. Proakis, Digital Communications, McGraw-Hill, 989.

Department of Electrical and Computer Engineering Ben-Gurion University of the Negev. LAB 1 - Introduction to USRP

Department of Electrical and Computer Engineering Ben-Gurion University of the Negev. LAB 1 - Introduction to USRP Department of Electrical and Computer Engineering Ben-Gurion University of the Negev LAB 1 - Introduction to USRP - 1-1 Introduction In this lab you will use software reconfigurable RF hardware from National

More information

Non-Data Aided Carrier Offset Compensation for SDR Implementation

Non-Data Aided Carrier Offset Compensation for SDR Implementation Non-Data Aided Carrier Offset Compensation for SDR Implementation Anders Riis Jensen 1, Niels Terp Kjeldgaard Jørgensen 1 Kim Laugesen 1, Yannick Le Moullec 1,2 1 Department of Electronic Systems, 2 Center

More information

PART 5D TECHNICAL AND OPERATING CHARACTERISTICS OF MOBILE-SATELLITE SERVICES RECOMMENDATION ITU-R M.1188

PART 5D TECHNICAL AND OPERATING CHARACTERISTICS OF MOBILE-SATELLITE SERVICES RECOMMENDATION ITU-R M.1188 Rec. ITU-R M.1188 1 PART 5D TECHNICAL AND OPERATING CHARACTERISTICS OF MOBILE-SATELLITE SERVICES Rec. ITU-R M.1188 RECOMMENDATION ITU-R M.1188 IMPACT OF PROPAGATION ON THE DESIGN OF NON-GSO MOBILE-SATELLITE

More information

Implementation of Digital Signal Processing: Some Background on GFSK Modulation

Implementation of Digital Signal Processing: Some Background on GFSK Modulation Implementation of Digital Signal Processing: Some Background on GFSK Modulation Sabih H. Gerez University of Twente, Department of Electrical Engineering s.h.gerez@utwente.nl Version 4 (February 7, 2013)

More information

GSM frequency planning

GSM frequency planning GSM frequency planning Band : 890-915 and 935-960 MHz Channel spacing: 200 khz (but signal bandwidth = 400 khz) Absolute Radio Frequency Channel Number (ARFCN) lower band: upper band: F l (n) = 890.2 +

More information

ISI Mitigation in Image Data for Wireless Wideband Communications Receivers using Adjustment of Estimated Flat Fading Errors

ISI Mitigation in Image Data for Wireless Wideband Communications Receivers using Adjustment of Estimated Flat Fading Errors International Journal of Engineering and Management Research, Volume-3, Issue-3, June 2013 ISSN No.: 2250-0758 Pages: 24-29 www.ijemr.net ISI Mitigation in Image Data for Wireless Wideband Communications

More information

A Performance Study of Wireless Broadband Access (WiMAX)

A Performance Study of Wireless Broadband Access (WiMAX) A Performance Study of Wireless Broadband Access (WiMAX) Maan A. S. Al-Adwany Department of Computer & Information Engineering, College of Electronics Engineering University of Mosul Mosul, Iraq maanaladwany@yahoo.com

More information

Propagation Channel Emulator ECP_V3

Propagation Channel Emulator ECP_V3 Navigation simulators Propagation Channel Emulator ECP_V3 1 Product Description The ECP (Propagation Channel Emulator V3) synthesizes the principal phenomena of propagation occurring on RF signal links

More information

INTRODUCTION TO COMMUNICATION SYSTEMS AND TRANSMISSION MEDIA

INTRODUCTION TO COMMUNICATION SYSTEMS AND TRANSMISSION MEDIA COMM.ENG INTRODUCTION TO COMMUNICATION SYSTEMS AND TRANSMISSION MEDIA 9/6/2014 LECTURES 1 Objectives To give a background on Communication system components and channels (media) A distinction between analogue

More information

Log-Likelihood Ratio-based Relay Selection Algorithm in Wireless Network

Log-Likelihood Ratio-based Relay Selection Algorithm in Wireless Network Recent Advances in Electrical Engineering and Electronic Devices Log-Likelihood Ratio-based Relay Selection Algorithm in Wireless Network Ahmed El-Mahdy and Ahmed Walid Faculty of Information Engineering

More information

The Effect of Network Cabling on Bit Error Rate Performance. By Paul Kish NORDX/CDT

The Effect of Network Cabling on Bit Error Rate Performance. By Paul Kish NORDX/CDT The Effect of Network Cabling on Bit Error Rate Performance By Paul Kish NORDX/CDT Table of Contents Introduction... 2 Probability of Causing Errors... 3 Noise Sources Contributing to Errors... 4 Bit Error

More information

Digital Modulation. David Tipper. Department of Information Science and Telecommunications University of Pittsburgh. Typical Communication System

Digital Modulation. David Tipper. Department of Information Science and Telecommunications University of Pittsburgh. Typical Communication System Digital Modulation David Tipper Associate Professor Department of Information Science and Telecommunications University of Pittsburgh http://www.tele.pitt.edu/tipper.html Typical Communication System Source

More information

Vector Signal Analyzer FSQ-K70

Vector Signal Analyzer FSQ-K70 Product brochure Version 02.00 Vector Signal Analyzer FSQ-K70 July 2004 Universal demodulation, analysis and documentation of digital radio signals For all major mobile radio communication standards: GSM

More information

Investigations on Correlation Properties of Ultra-Wideband Radio Channels

Investigations on Correlation Properties of Ultra-Wideband Radio Channels Investigations on Correlation Properties of Ultra-Wideband Radio Channels S. Bieder A. Czylwik L. Häring A. Alshabo p. 1 Outline Introduction Measurement Principle Measurement Equipment Verification of

More information

The Advantages of SOFDMA for WiMAX

The Advantages of SOFDMA for WiMAX The Advantages of SOFDMA for WiMAX Vladimir Bykovnikov Intel Corporation Abstract SOFDMA has several advantages when used in NLOS wireless networks. The paper outlines these advantages and shows the evolutionary

More information

Bluetooth voice and data performance in 802.11 DS WLAN environment

Bluetooth voice and data performance in 802.11 DS WLAN environment 1 (1) Bluetooth voice and data performance in 802.11 DS WLAN environment Abstract In this document, the impact of a 20dBm 802.11 Direct-Sequence WLAN system on a 0dBm Bluetooth link is studied. A typical

More information

5 Signal Design for Bandlimited Channels

5 Signal Design for Bandlimited Channels 225 5 Signal Design for Bandlimited Channels So far, we have not imposed any bandwidth constraints on the transmitted passband signal, or equivalently, on the transmitted baseband signal s b (t) I[k]g

More information

Revision of Lecture Eighteen

Revision of Lecture Eighteen Revision of Lecture Eighteen Previous lecture has discussed equalisation using Viterbi algorithm: Note similarity with channel decoding using maximum likelihood sequence estimation principle It also discusses

More information

Comparison of Distributed and Co-located Antenna Diversity Schemes for the Coverage Improvement of VoWLAN Systems

Comparison of Distributed and Co-located Antenna Diversity Schemes for the Coverage Improvement of VoWLAN Systems Comparison of Distributed and Co-located Antenna Diversity Schemes for the Coverage Improvement of VoWLAN Systems Azadeh Ettefagh 1, Marc Kuhn 1, Barry Cheetham 2, Armin Wittneben 1 1 Swiss Federal Institute

More information

Propsim enabled Mobile Ad-hoc Network Testing

Propsim enabled Mobile Ad-hoc Network Testing www.anite.com Propsim enabled Mobile Ad-hoc Network Testing Anite is now part of Keysight Technologies Lab-based, end-to-end performance testing of systems using Propsim MANET channel emulation A Mobile

More information

RF Measurements Using a Modular Digitizer

RF Measurements Using a Modular Digitizer RF Measurements Using a Modular Digitizer Modern modular digitizers, like the Spectrum M4i series PCIe digitizers, offer greater bandwidth and higher resolution at any given bandwidth than ever before.

More information

GSM/EDGE Output RF Spectrum on the V93000 Joe Kelly and Max Seminario, Verigy

GSM/EDGE Output RF Spectrum on the V93000 Joe Kelly and Max Seminario, Verigy GSM/EDGE Output RF Spectrum on the V93000 Joe Kelly and Max Seminario, Verigy Introduction A key transmitter measurement for GSM and EDGE is the Output RF Spectrum, or ORFS. The basis of this measurement

More information

PXI. www.aeroflex.com. GSM/EDGE Measurement Suite

PXI. www.aeroflex.com. GSM/EDGE Measurement Suite PXI GSM/EDGE Measurement Suite The GSM/EDGE measurement suite is a collection of software tools for use with Aeroflex PXI 3000 Series RF modular instruments for characterising the performance of GSM/HSCSD/GPRS

More information

Electronic Communications Committee (ECC) within the European Conference of Postal and Telecommunications Administrations (CEPT)

Electronic Communications Committee (ECC) within the European Conference of Postal and Telecommunications Administrations (CEPT) Page 1 Electronic Communications Committee (ECC) within the European Conference of Postal and Telecommunications Administrations (CEPT) ECC RECOMMENDATION (06)01 Bandwidth measurements using FFT techniques

More information

ADVANCED APPLICATIONS OF ELECTRICAL ENGINEERING

ADVANCED APPLICATIONS OF ELECTRICAL ENGINEERING Development of a Software Tool for Performance Evaluation of MIMO OFDM Alamouti using a didactical Approach as a Educational and Research support in Wireless Communications JOSE CORDOVA, REBECA ESTRADA

More information

Impedance 50 (75 connectors via adapters)

Impedance 50 (75 connectors via adapters) VECTOR NETWORK ANALYZER PLANAR TR1300/1 DATA SHEET Frequency range: 300 khz to 1.3 GHz Measured parameters: S11, S21 Dynamic range of transmission measurement magnitude: 130 db Measurement time per point:

More information

CDMA Technology : Pr. S. Flament www.greyc.fr/user/99. Pr. Dr. W. Skupin www.htwg-konstanz.de. On line Course on CDMA Technology

CDMA Technology : Pr. S. Flament www.greyc.fr/user/99. Pr. Dr. W. Skupin www.htwg-konstanz.de. On line Course on CDMA Technology CDMA Technology : Pr. Dr. W. Skupin www.htwg-konstanz.de Pr. S. Flament www.greyc.fr/user/99 On line Course on CDMA Technology CDMA Technology : Introduction to Spread Spectrum Technology CDMA / DS : Principle

More information

RADIO FREQUENCY INTERFERENCE AND CAPACITY REDUCTION IN DSL

RADIO FREQUENCY INTERFERENCE AND CAPACITY REDUCTION IN DSL RADIO FREQUENCY INTERFERENCE AND CAPACITY REDUCTION IN DSL Padmabala Venugopal, Michael J. Carter*, Scott A. Valcourt, InterOperability Laboratory, Technology Drive Suite, University of New Hampshire,

More information

R&D White Paper WHP 049. Digital Radio Mondiale: finding the right transmission mode for tropical broadcasting

R&D White Paper WHP 049. Digital Radio Mondiale: finding the right transmission mode for tropical broadcasting R&D White Paper WHP 049 September 2002 Digital Radio Mondiale: finding the right transmission mode for tropical broadcasting A. Giefer Research & Development BRITISH BROADCASTING CORPORATION BBC Research

More information

AM/FM/ϕM Measurement Demodulator FS-K7

AM/FM/ϕM Measurement Demodulator FS-K7 Data sheet Version 02.00 AM/FM/ϕM Measurement Demodulator FS-K7 July 2005 for the Analyzers FSQ/FSU/FSP and the Test Receivers ESCI/ESPI AM/FM/ϕM demodulator for measuring analog modulation parameters

More information

Frequency Hopping for GSM Base Station Tests with Signal Generators SME

Frequency Hopping for GSM Base Station Tests with Signal Generators SME Frequency Hopping for GSM Base Station Tests with Signal Generators SME Application Note 1GPAN28E A. Winter 07.95 Products: Signal Generator SME Software Package SME-K1 Introduction One of the problems

More information

Optimum Frequency-Domain Partial Response Encoding in OFDM System

Optimum Frequency-Domain Partial Response Encoding in OFDM System 1064 IEEE TRANSACTIONS ON COMMUNICATIONS, VOL 51, NO 7, JULY 2003 Optimum Frequency-Domain Partial Response Encoding in OFDM System Hua Zhang and Ye (Geoffrey) Li, Senior Member, IEEE Abstract Time variance

More information

Appendix C GSM System and Modulation Description

Appendix C GSM System and Modulation Description C1 Appendix C GSM System and Modulation Description C1. Parameters included in the modelling In the modelling the number of mobiles and their positioning with respect to the wired device needs to be taken

More information

Packet Queueing Delay in Wireless Networks with Multiple Base Stations and Cellular Frequency Reuse

Packet Queueing Delay in Wireless Networks with Multiple Base Stations and Cellular Frequency Reuse Packet Queueing Delay in Wireless Networks with Multiple Base Stations and Cellular Frequency Reuse Abstract - Cellular frequency reuse is known to be an efficient method to allow many wireless telephone

More information

PHASE ESTIMATION ALGORITHM FOR FREQUENCY HOPPED BINARY PSK AND DPSK WAVEFORMS WITH SMALL NUMBER OF REFERENCE SYMBOLS

PHASE ESTIMATION ALGORITHM FOR FREQUENCY HOPPED BINARY PSK AND DPSK WAVEFORMS WITH SMALL NUMBER OF REFERENCE SYMBOLS PHASE ESTIMATION ALGORITHM FOR FREQUENCY HOPPED BINARY PSK AND DPSK WAVEFORMS WITH SMALL NUM OF REFERENCE SYMBOLS Benjamin R. Wiederholt The MITRE Corporation Bedford, MA and Mario A. Blanco The MITRE

More information

MIMO Antenna Systems in WinProp

MIMO Antenna Systems in WinProp MIMO Antenna Systems in WinProp AWE Communications GmbH Otto-Lilienthal-Str. 36 D-71034 Böblingen mail@awe-communications.com Issue Date Changes V1.0 Nov. 2010 First version of document V2.0 Feb. 2011

More information

DVB-T BER MEASUREMENTS IN THE PRESENCE OF ADJACENT CHANNEL AND CO-CHANNEL ANALOGUE TELEVISION INTERFERENCE

DVB-T BER MEASUREMENTS IN THE PRESENCE OF ADJACENT CHANNEL AND CO-CHANNEL ANALOGUE TELEVISION INTERFERENCE DVB-T MEASUREMENTS IN THE PRESENCE OF ADJACENT CHANNEL AND CO-CHANNEL ANALOGUE TELEVISION INTERFERENCE M. Mª Vélez (jtpveelm@bi.ehu.es), P. Angueira, D. de la Vega, A. Arrinda, J. L. Ordiales UNIVERSITY

More information

Attenuation (amplitude of the wave loses strength thereby the signal power) Refraction Reflection Shadowing Scattering Diffraction

Attenuation (amplitude of the wave loses strength thereby the signal power) Refraction Reflection Shadowing Scattering Diffraction Wireless Physical Layer Q1. Is it possible to transmit a digital signal, e.g., coded as square wave as used inside a computer, using radio transmission without any loss? Why? It is not possible to transmit

More information

EECC694 - Shaaban. Transmission Channel

EECC694 - Shaaban. Transmission Channel The Physical Layer: Data Transmission Basics Encode data as energy at the data (information) source and transmit the encoded energy using transmitter hardware: Possible Energy Forms: Electrical, light,

More information

Implementing Digital Wireless Systems. And an FCC update

Implementing Digital Wireless Systems. And an FCC update Implementing Digital Wireless Systems And an FCC update Spectrum Repacking Here We Go Again: The FCC is reallocating 600 MHz Frequencies for Wireless Mics 30-45 MHz (8-m HF) 174-250 MHz (VHF) 450-960 MHz

More information

Time and Frequency Domain Equalization

Time and Frequency Domain Equalization Time and Frequency Domain Equalization Presented By: Khaled Shawky Hassan Under Supervision of: Prof. Werner Henkel Introduction to Equalization Non-ideal analog-media such as telephone cables and radio

More information

Lezione 6 Communications Blockset

Lezione 6 Communications Blockset Corso di Tecniche CAD per le Telecomunicazioni A.A. 2007-2008 Lezione 6 Communications Blockset Ing. Marco GALEAZZI 1 What Is Communications Blockset? Communications Blockset extends Simulink with a comprehensive

More information

CS263: Wireless Communications and Sensor Networks

CS263: Wireless Communications and Sensor Networks CS263: Wireless Communications and Sensor Networks Matt Welsh Lecture 4: Medium Access Control October 5, 2004 2004 Matt Welsh Harvard University 1 Today's Lecture Medium Access Control Schemes: FDMA TDMA

More information

T = 1 f. Phase. Measure of relative position in time within a single period of a signal For a periodic signal f(t), phase is fractional part t p

T = 1 f. Phase. Measure of relative position in time within a single period of a signal For a periodic signal f(t), phase is fractional part t p Data Transmission Concepts and terminology Transmission terminology Transmission from transmitter to receiver goes over some transmission medium using electromagnetic waves Guided media. Waves are guided

More information

LTE PHY Fundamentals Roger Piqueras Jover

LTE PHY Fundamentals Roger Piqueras Jover LTE PHY Fundamentals Roger Piqueras Jover DL Physical Channels - DL-SCH: The DownLink Shared CHannel is a channel used to transport down-link user data or Radio Resource Control (RRC) messages, as well

More information

DDX 7000 & 8003. Digital Partial Discharge Detectors FEATURES APPLICATIONS

DDX 7000 & 8003. Digital Partial Discharge Detectors FEATURES APPLICATIONS DDX 7000 & 8003 Digital Partial Discharge Detectors The HAEFELY HIPOTRONICS DDX Digital Partial Discharge Detector offers the high accuracy and flexibility of digital technology, plus the real-time display

More information

Agilent GSM/EDGE Base Station Test with the E4406A VSA and ESG-D Series RF Signal Generators Product Overview

Agilent GSM/EDGE Base Station Test with the E4406A VSA and ESG-D Series RF Signal Generators Product Overview Agilent GSM/EDGE Base Station Test with the E4406A VSA and ESG-D Series RF Signal Generators Product Overview The flexible GSM/EDGE base station test solution with a 3G future... Designed for manufacturing

More information

MSB MODULATION DOUBLES CABLE TV CAPACITY Harold R. Walker and Bohdan Stryzak Pegasus Data Systems ( 5/12/06) pegasusdat@aol.com

MSB MODULATION DOUBLES CABLE TV CAPACITY Harold R. Walker and Bohdan Stryzak Pegasus Data Systems ( 5/12/06) pegasusdat@aol.com MSB MODULATION DOUBLES CABLE TV CAPACITY Harold R. Walker and Bohdan Stryzak Pegasus Data Systems ( 5/12/06) pegasusdat@aol.com Abstract: Ultra Narrow Band Modulation ( Minimum Sideband Modulation ) makes

More information

NEW WORLD TELECOMMUNICATIONS LIMITED. 2 nd Trial Test Report on 3.5GHz Broadband Wireless Access Technology

NEW WORLD TELECOMMUNICATIONS LIMITED. 2 nd Trial Test Report on 3.5GHz Broadband Wireless Access Technology NEW WORLD TELECOMMUNICATIONS LIMITED 2 nd Trial Test Report on 3.5GHz Broadband Wireless Access Technology Issue Number: 01 Issue Date: 20 April 2006 New World Telecommunications Ltd Page 1 of 9 Issue

More information

Dynamic Reconfiguration & Efficient Resource Allocation for Indoor Broadband Wireless Networks

Dynamic Reconfiguration & Efficient Resource Allocation for Indoor Broadband Wireless Networks Dynamic Reconfiguration & Efficient Resource Allocation for Indoor Broadband Wireless Networks Tim Farnham, Brian Foxon* Home Communications Department HP Laboratories Bristol HPL-98-123 June, 1998 broadband,

More information

Frequency Hopping Spread Spectrum (FHSS) vs. Direct Sequence Spread Spectrum (DSSS) in Broadband Wireless Access (BWA) and Wireless LAN (WLAN)

Frequency Hopping Spread Spectrum (FHSS) vs. Direct Sequence Spread Spectrum (DSSS) in Broadband Wireless Access (BWA) and Wireless LAN (WLAN) FHSS vs. DSSS page 1 of 16 Frequency Hopping Spread Spectrum (FHSS) vs. Direct Sequence Spread Spectrum (DSSS) in Broadband Wireless Access (BWA) and Wireless LAN (WLAN) by Sorin M. SCHWARTZ Scope In 1997

More information

RESULTS OF TESTS WITH DOMESTIC RECEIVER IC S FOR DVB-T. C.R. Nokes BBC R&D, UK ABSTRACT

RESULTS OF TESTS WITH DOMESTIC RECEIVER IC S FOR DVB-T. C.R. Nokes BBC R&D, UK ABSTRACT RESULTS OF TESTS WITH DOMESTIC RECEIVER IC S FOR DVB-T C.R. Nokes BBC R&D, UK ABSTRACT Digital terrestrial television services using the DVB-T standard will be launched later this year in the UK, followed

More information

Mobile Communications Chapter 2: Wireless Transmission

Mobile Communications Chapter 2: Wireless Transmission Mobile Communications Chapter 2: Wireless Transmission Frequencies Signals Antennas Signal propagation Multiplexing Spread spectrum Modulation Cellular systems Prof. Dr.-Ing. Jochen Schiller, http://www.jochenschiller.de/

More information

HD Radio FM Transmission System Specifications Rev. F August 24, 2011

HD Radio FM Transmission System Specifications Rev. F August 24, 2011 HD Radio FM Transmission System Specifications Rev. F August 24, 2011 SY_SSS_1026s TRADEMARKS HD Radio and the HD, HD Radio, and Arc logos are proprietary trademarks of ibiquity Digital Corporation. ibiquity,

More information

DVB-SH. Radio Network Planning Tool. (Release 4.2)

DVB-SH. Radio Network Planning Tool. (Release 4.2) DVB-SH Radio Network Planning Tool (Release 4.2) by AWE Communications GmbH. All rights reserved 1 1 Introduction 1.1 Overview Digital Video Broadcasting Satellite to Handheld (DVB-SH) aims to provide

More information

COMPATIBILITY AND SHARING ANALYSIS BETWEEN DVB T AND RADIO MICROPHONES IN BANDS IV AND V

COMPATIBILITY AND SHARING ANALYSIS BETWEEN DVB T AND RADIO MICROPHONES IN BANDS IV AND V European Radiocommunications Committee (ERC) within the European Conference of Postal and Telecommunications Administrations (CEPT) COMPATIBILITY AND SHARING ANALYSIS BETWEEN DVB T AND RADIO MICROPHONES

More information

QAM Demodulation. Performance Conclusion. o o o o o. (Nyquist shaping, Clock & Carrier Recovery, AGC, Adaptive Equaliser) o o. Wireless Communications

QAM Demodulation. Performance Conclusion. o o o o o. (Nyquist shaping, Clock & Carrier Recovery, AGC, Adaptive Equaliser) o o. Wireless Communications 0 QAM Demodulation o o o o o Application area What is QAM? What are QAM Demodulation Functions? General block diagram of QAM demodulator Explanation of the main function (Nyquist shaping, Clock & Carrier

More information

Data Transmission. Data Communications Model. CSE 3461 / 5461: Computer Networking & Internet Technologies. Presentation B

Data Transmission. Data Communications Model. CSE 3461 / 5461: Computer Networking & Internet Technologies. Presentation B CSE 3461 / 5461: Computer Networking & Internet Technologies Data Transmission Presentation B Kannan Srinivasan 08/30/2012 Data Communications Model Figure 1.2 Studying Assignment: 3.1-3.4, 4.1 Presentation

More information

Agilent Technologies. Generating Custom, Real-World Waveforms Integrating Test Instrumentation into the Design Process Application Note 1360

Agilent Technologies. Generating Custom, Real-World Waveforms Integrating Test Instrumentation into the Design Process Application Note 1360 Agilent Technologies Generating Custom, Real-World Waveforms Integrating Test Instrumentation into the Design Process Application Note 1360 Table of Contents Introduction...............................................................................3

More information

Agilent Creating Multi-tone Signals With the N7509A Waveform Generation Toolbox. Application Note

Agilent Creating Multi-tone Signals With the N7509A Waveform Generation Toolbox. Application Note Agilent Creating Multi-tone Signals With the N7509A Waveform Generation Toolbox Application Note Introduction Of all the signal engines in the N7509A, the most complex is the multi-tone engine. This application

More information

Characterization of Ultra Wideband Channel in Data Centers

Characterization of Ultra Wideband Channel in Data Centers Characterization of Ultra Wideband Channel in Data Centers N. Udar 1,K.Kant 2,R.Viswanathan 1, and D. Cheung 2 1 Southern Illinois University, Carbondale, IL 2 Intel Corporation, Hillsboro, OR Abstract.

More information

MODULATION Systems (part 1)

MODULATION Systems (part 1) Technologies and Services on Digital Broadcasting (8) MODULATION Systems (part ) "Technologies and Services of Digital Broadcasting" (in Japanese, ISBN4-339-62-2) is published by CORONA publishing co.,

More information

TABLE OF CONTENTS. Dedication. Table of Contents. Preface. Overview of Wireless Networks. vii 1.1 1.2 1.3 1.4 1.5 1.6 1.7. xvii

TABLE OF CONTENTS. Dedication. Table of Contents. Preface. Overview of Wireless Networks. vii 1.1 1.2 1.3 1.4 1.5 1.6 1.7. xvii TABLE OF CONTENTS Dedication Table of Contents Preface v vii xvii Chapter 1 Overview of Wireless Networks 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Signal Coverage Propagation Mechanisms 1.2.1 Multipath 1.2.2 Delay

More information

Whitepaper. 802.11n The Next Generation in Wireless Technology

Whitepaper. 802.11n The Next Generation in Wireless Technology Whitepaper 802.11n The Next Generation in Wireless Technology Introduction Wireless technology continues to evolve and add value with its inherent characteristics. First came 802.11, then a & b, followed

More information

Wireless Communication and RF System Design Using MATLAB and Simulink Giorgia Zucchelli Technical Marketing RF & Mixed-Signal

Wireless Communication and RF System Design Using MATLAB and Simulink Giorgia Zucchelli Technical Marketing RF & Mixed-Signal Wireless Communication and RF System Design Using MATLAB and Simulink Giorgia Zucchelli Technical Marketing RF & Mixed-Signal 2013 The MathWorks, Inc. 1 Outline of Today s Presentation Introduction to

More information

Interpreting the Information Element C/I

Interpreting the Information Element C/I Prepared Date Rev Document no pproved File/reference 1(17) 2000-04-11 Interpreting the Information Element C/I This document primarily addresses users of TEMS Investigation. 2(17) 1 Introduction Why is

More information

Omni Antenna vs. Directional Antenna

Omni Antenna vs. Directional Antenna Omni Antenna vs. Directional Antenna Document ID: 82068 Contents Introduction Prerequisites Requirements Components Used Conventions Basic Definitions and Antenna Concepts Indoor Effects Omni Antenna Pros

More information

Characterization and Evaluation of Non-Line-of-Sight Paths for Fixed Broadband Wireless Communications. Timothy M. Gallagher

Characterization and Evaluation of Non-Line-of-Sight Paths for Fixed Broadband Wireless Communications. Timothy M. Gallagher Characterization and Evaluation of Non-Line-of-Sight Paths for Fixed Broadband Wireless Communications Timothy M. Gallagher Dissertation submitted to the faculty of the Virginia Polytechnic Institute and

More information

Integrated Broadband Mobile System (IBMS) Demonstrator

Integrated Broadband Mobile System (IBMS) Demonstrator Integrated Broadband Mobile System (IBMS) Demonstrator V.Brankovic 1, T.Dölle 1, T.Konschak 1, M.Bronzel 2, J.Jelitto 2, G. Fettweis 2, K.Jaeger 3, R.Schiffel 3 1 SONY International GmbH, TRDE, Stuttgart,

More information

Antennas & Propagation. CS 6710 Spring 2010 Rajmohan Rajaraman

Antennas & Propagation. CS 6710 Spring 2010 Rajmohan Rajaraman Antennas & Propagation CS 6710 Spring 2010 Rajmohan Rajaraman Introduction An antenna is an electrical conductor or system of conductors o Transmission - radiates electromagnetic energy into space o Reception

More information

AN1200.04. Application Note: FCC Regulations for ISM Band Devices: 902-928 MHz. FCC Regulations for ISM Band Devices: 902-928 MHz

AN1200.04. Application Note: FCC Regulations for ISM Band Devices: 902-928 MHz. FCC Regulations for ISM Band Devices: 902-928 MHz AN1200.04 Application Note: FCC Regulations for ISM Band Devices: Copyright Semtech 2006 1 of 15 www.semtech.com 1 Table of Contents 1 Table of Contents...2 1.1 Index of Figures...2 1.2 Index of Tables...2

More information

Environmental Effects On Phase Coherent Underwater Acoustic Communications: A Perspective From Several Experimental Measurements

Environmental Effects On Phase Coherent Underwater Acoustic Communications: A Perspective From Several Experimental Measurements Environmental Effects On Phase Coherent Underwater Acoustic Communications: A Perspective From Several Experimental Measurements T. C. Yang, Naval Research Lab., Washington DC 20375 Abstract. This paper

More information

Antenna Properties and their impact on Wireless System Performance. Dr. Steven R. Best. Cushcraft Corporation 48 Perimeter Road Manchester, NH 03013

Antenna Properties and their impact on Wireless System Performance. Dr. Steven R. Best. Cushcraft Corporation 48 Perimeter Road Manchester, NH 03013 Antenna Properties and their impact on Wireless System Performance Dr. Steven R. Best Cushcraft Corporation 48 Perimeter Road Manchester, NH 03013 Phone (603) 627-7877 FAX: (603) 627-1764 Email: sbest@cushcraft.com

More information

Inter-Cell Interference Coordination (ICIC) Technology

Inter-Cell Interference Coordination (ICIC) Technology Inter-Cell Interference Coordination (ICIC) Technology Dai Kimura Hiroyuki Seki Long Term Evolution (LTE) is a promising standard for next-generation cellular systems targeted to have a peak downlink bit

More information

GSM BTS Development & GSM/EDGE Receiver based on FDE

GSM BTS Development & GSM/EDGE Receiver based on FDE GSM BTS Development & GSM/EDGE Receiver based on FDE Dinakar. P dinakarp@tenet.res.in Dept. of Electrical Engineering Indian Institute of Technology - Madras ComNet - 2007 Introduction: GSM Global System

More information

MEDIA TECHNOLOGY & INNOVATION. General issues to be considered when planning SFNs

MEDIA TECHNOLOGY & INNOVATION. General issues to be considered when planning SFNs EBU TECHNICAL MEDIA TECHNOLOGY & INNOVATION 13/03/09 General issues to be considered when planning SFNs 1. SFN networks In a Single Frequency Network (SFN), all transmitters in the network use the same

More information

Multiple Access Techniques

Multiple Access Techniques Multiple Access Techniques Dr. Francis LAU Dr. Francis CM Lau, Associate Professor, EIE, PolyU Content Introduction Frequency Division Multiple Access Time Division Multiple Access Code Division Multiple

More information

Rapid Prototyping of a Frequency Hopping Ad Hoc Network System

Rapid Prototyping of a Frequency Hopping Ad Hoc Network System Rapid Prototyping of a Frequency Hopping Ad Hoc Network System Martin Braun, Nico Otterbach, Jens Elsner, and Friedrich K. Jondral Communications Engineering Lab, Karlsruhe Institute of Technology (KIT),

More information

SC-FDMA for 3GPP LTE uplink. Hong-Jik Kim, Ph. D.

SC-FDMA for 3GPP LTE uplink. Hong-Jik Kim, Ph. D. SC-FDMA for 3GPP LTE uplink, Ph D Wireless Broadband The New Category Mobil ile Local Area Fixe ed Cellular Cordless POTS UMTS / WCDM A HSDPA 3GPP LTE Wireless Broadband 1xEV-DO WiMAX 80216e 80220 80211

More information

Efficient Data Recovery scheme in PTS-Based OFDM systems with MATRIX Formulation

Efficient Data Recovery scheme in PTS-Based OFDM systems with MATRIX Formulation Efficient Data Recovery scheme in PTS-Based OFDM systems with MATRIX Formulation Sunil Karthick.M PG Scholar Department of ECE Kongu Engineering College Perundurau-638052 Venkatachalam.S Assistant Professor

More information

T-79.7001 Postgraduate Course in Theoretical Computer Science T-79.5401 Special Course in Mobility Management: Ad hoc networks (2-10 cr) P V

T-79.7001 Postgraduate Course in Theoretical Computer Science T-79.5401 Special Course in Mobility Management: Ad hoc networks (2-10 cr) P V T-79.7001 Postgraduate Course in Theoretical Computer Science T-79.5401 Special Course in Mobility Management: Ad hoc networks (2-10 cr) P V professor Hannu H. Kari Laboratory for Theoretical Computer

More information

Sampling Theorem Notes. Recall: That a time sampled signal is like taking a snap shot or picture of signal periodically.

Sampling Theorem Notes. Recall: That a time sampled signal is like taking a snap shot or picture of signal periodically. Sampling Theorem We will show that a band limited signal can be reconstructed exactly from its discrete time samples. Recall: That a time sampled signal is like taking a snap shot or picture of signal

More information

CDMA Performance under Fading Channel

CDMA Performance under Fading Channel CDMA Performance under Fading Channel Ashwini Dyahadray 05307901 Under the guidance of: Prof Girish P Saraph Department of Electrical Engineering Overview Wireless channel fading characteristics Large

More information

Measurement, Modeling and Simulation of Power Line Channel for Indoor High-speed Data Communications

Measurement, Modeling and Simulation of Power Line Channel for Indoor High-speed Data Communications Measurement, Modeling and Simulation of Power Line Channel for Indoor High-speed Data Communications Jong-ho Lee, Ji-hoon Park', Hyun-Suk Lee, Gi-Won Leett and Seong-cheol Kim School of Electrical and

More information

Measuring the Wireless Channel

Measuring the Wireless Channel Measuring the Wireless Channel Author: Prof Roland Küng, Elektrobit AG and HSR University of Applied Sciences, Switzerland Introduction We believe most communications can eventually be available through

More information

Agilent E3830 Series Wide-bandwidth Signal Analyzer Custom Systems 100 MHz Bandwidth Microwave Vector Signal Analysis

Agilent E3830 Series Wide-bandwidth Signal Analyzer Custom Systems 100 MHz Bandwidth Microwave Vector Signal Analysis Agilent E3830 Series Wide-bandwidth Signal Analyzer Custom Systems 100 MHz Bandwidth Microwave Vector Signal Analysis The measurement challenge 2 Many advanced microwave applications involve complex wideband

More information

An Algorithm for Automatic Base Station Placement in Cellular Network Deployment

An Algorithm for Automatic Base Station Placement in Cellular Network Deployment An Algorithm for Automatic Base Station Placement in Cellular Network Deployment István Törős and Péter Fazekas High Speed Networks Laboratory Dept. of Telecommunications, Budapest University of Technology

More information

RF SYSTEM DESIGN OF TRANSCEIVERS FOR WIRELESS COMMUNICATIONS

RF SYSTEM DESIGN OF TRANSCEIVERS FOR WIRELESS COMMUNICATIONS RF SYSTEM DESIGN OF TRANSCEIVERS FOR WIRELESS COMMUNICATIONS Qizheng Gu Nokia Mobile Phones, Inc. 4y Springer Contents Preface xiii Chapter 1. Introduction 1 1.1. Wireless Systems 1 1.1.1. Mobile Communications

More information

Voice services over Adaptive Multi-user Orthogonal Sub channels An Insight

Voice services over Adaptive Multi-user Orthogonal Sub channels An Insight TEC Voice services over Adaptive Multi-user Orthogonal Sub channels An Insight HP 4/15/2013 A powerful software upgrade leverages quaternary modulation and MIMO techniques to improve network efficiency

More information

Using the Equalizer Filter in the VSA Application Firmware for R&S Signal and Spectrum Analyzer Application Note

Using the Equalizer Filter in the VSA Application Firmware for R&S Signal and Spectrum Analyzer Application Note Using the Equalizer Filter in the VSA Application Firmware for R&S Signal and Spectrum Analyzer Application Note Products: R&S FSQ R&S FSG R&S FMU R&S FSU R&S FSUP R&S FSMR The R&S spectrum analyzers and

More information

GSM and Similar Architectures Lesson 07 GSM Radio Interface, Data bursts and Interleaving

GSM and Similar Architectures Lesson 07 GSM Radio Interface, Data bursts and Interleaving GSM and Similar Architectures Lesson 07 GSM Radio Interface, Data bursts and Interleaving 1 Space Division Multiple Access of the signals from the MSs A BTS with n directed antennae covers mobile stations

More information

EE4367 Telecom. Switching & Transmission. Prof. Murat Torlak

EE4367 Telecom. Switching & Transmission. Prof. Murat Torlak Path Loss Radio Wave Propagation The wireless radio channel puts fundamental limitations to the performance of wireless communications systems Radio channels are extremely random, and are not easily analyzed

More information

Introduction to Clean-Slate Cellular IoT radio access solution. Robert Young (Neul) David Zhang (Huawei)

Introduction to Clean-Slate Cellular IoT radio access solution. Robert Young (Neul) David Zhang (Huawei) Introduction to Clean-Slate Cellular IoT radio access solution Robert Young (Neul) David Zhang (Huawei) Page 11 Introduction and motivation There is a huge opportunity for Mobile Network Operators to exploit

More information

Demonstration of a Software Defined Radio Platform for dynamic spectrum allocation.

Demonstration of a Software Defined Radio Platform for dynamic spectrum allocation. Demonstration of a Software Defined Radio Platform for dynamic spectrum allocation. Livia Ruiz Centre for Telecommunications Value-Chain Research Institute of Microelectronic and Wireless Systems, NUI

More information

APPLICATION NOTE. RF System Architecture Considerations ATAN0014. Description

APPLICATION NOTE. RF System Architecture Considerations ATAN0014. Description APPLICATION NOTE RF System Architecture Considerations ATAN0014 Description Highly integrated and advanced radio designs available today, such as the Atmel ATA5830 transceiver and Atmel ATA5780 receiver,

More information

RF Communication System. EE 172 Systems Group Presentation

RF Communication System. EE 172 Systems Group Presentation RF Communication System EE 172 Systems Group Presentation RF System Outline Transmitter Components Receiver Components Noise Figure Link Budget Test Equipment System Success Design Remedy Transmitter Components

More information

RECOMMENDATION ITU-R F.1113. (Question ITU-R 157/9) b) that systems using this mode of propagation are already in service for burst data transmission,

RECOMMENDATION ITU-R F.1113. (Question ITU-R 157/9) b) that systems using this mode of propagation are already in service for burst data transmission, Rec. ITU-R F.1113 1 RECOMMENDATION ITU-R F.1113 RADIO SYSTEMS EMPLOYING METEOR-BURST PROPAGATION (Question ITU-R 157/9) (1994) Rec. ITU-R F.1113 The ITU Radiocommunication Assembly, considering a) that

More information

WIDE AREA ADAPTIVE SPECTRUM APPLICATIONS. Daniel J. Schaefer MITRE Corporation Reston, VA

WIDE AREA ADAPTIVE SPECTRUM APPLICATIONS. Daniel J. Schaefer MITRE Corporation Reston, VA WIDE AREA ADAPTIVE SPECTRUM APPLICATIONS Daniel J. Schaefer MITRE Corporation Reston, VA ABSTRACT This paper examines spectrum opportunistic systems in which the currently assigned spectrum is monitored

More information

communication over wireless link handling mobile user who changes point of attachment to network

communication over wireless link handling mobile user who changes point of attachment to network Wireless Networks Background: # wireless (mobile) phone subscribers now exceeds # wired phone subscribers! computer nets: laptops, palmtops, PDAs, Internet-enabled phone promise anytime untethered Internet

More information

DVB-T and Wireless Microphone Exclusion Area Computation Through Interference Analysis

DVB-T and Wireless Microphone Exclusion Area Computation Through Interference Analysis SE43(11)Info 12 DVB-T and Wireless Microphone Exclusion Area Computation Through Interference Analysis Rogério Dionísio Instituto de Telecomunicações - Portugal 11th SE43 meeting, 19 September 2011 Page

More information