Concepts of LTE & RF Parametric Receiver Tests on PHY layer. David Barner Agilent Technologies

Transcription

1 Concepts of LTE & RF Parametric Receiver Tests on PHY layer David Barner Agilent Technologies

2 Agenda Brief review of LTE physical layer LTE physical layer Receiver tests Measurement solutions

3 LTE PHY Layer Characteristics Service Goals Data transfer rate ( max) Users/cell (max) Mobility DL: 173Mbps, UL: 86Mbps 200 active 0-15 km/h best performance km/h high performance Physical Layer Details Duplex Modes FDD, TDD Frequency assignments 700 MHz Public Safety 840, 940, 1750, 1930, 2150, 2570 MHz Channel bandwidths FDD: 1.4, 3, 5, 10, 15, 20 MHz DL transmission OFDM using QPSK, 16QAM, 64QAM UL transmission SC-FDMA using QPSK, 16QAM,64QAM Number of carriers 72 to 1200 Carrier spacing Fixed 15 khz (7.5 khz extended CP) Additional mod types Zadaoff-Chu, BPSK (CMD)

4 Physical Layer Definitions: Frame Structure Frame Structure type 1 (FDD) FDD: Uplink and downlink are transmitted separately One radio frame = 10 ms One slot = 0.5 ms #0 #1 #2 #3. #18 #19 One subframe = 1ms Subframe 0 Subframe 1 Subframe 9 Frame Structure type 2 (TDD) One radio frame, T f = x Ts = 10 ms One half-frame, x Ts = 5 ms TDD: Uplink and downlink are transmitted at the same time One subframe, x Ts = 1 ms One slot, T slot =15360 x Ts = 0.5 ms #0 #2 #3 #4 #5 #7 #8 #9 DwPTS Guard period UpPTS DwPTS Guard period UpPTS PTS = Pilot Time Slot

5 Slot Structure & Physical Resource Elements One slot, T slot DL N symb OFDM symbols : Resource block x DL N symb RB N sc Condition (DL) N RB sc N DL symb Normal cyclic prefix Extended cyclic prefix f=15khz 12 7 f=15khz 12 6 f=7.5khz 24 3 x RB N sc subcarriers RB N sc Resource element (k, l) subcarriers Condition (UL) N RB sc N UL symb Normal cyclic prefix Extended cyclic prefix RB N sc : DL l=0 l= 1 N symb

6 LTE Physical Layer Signals & Channels LTE air interface consists of two main components: 1. Physical channels These carry data from higher layers including control, scheduling and user payload 2. Physical signals These are generated in Layer 1 and are used for system synchronization, cell identification and radio channel estimation The following is a simplified high-level description of the essential signals and channels.

7 LTE Air Interface: Downlink Physical Channels (1 of 2) Broadcast Channel PBCH Physical Broadcast Channel Indicator Channels PCFICH Physical Control Format Indicator Channel PHICH Physical Hybrid-ARQ Indicator Channel Base Station (enb) PBCH: - Carries cell specific information such as system bandwidth, number of Tx antennas etc - Transmitted in the centre 72 subcarriers (6 RB) around DC at OFDMA symbol #0 to #3 of Slot #1 of sub-frame #0 - Modulation scheme = QPSK PCFICH: - Carries information on the number of OFDM symbols used for transmission of PDCCH s in a sub-frame - Transmitted on symbol #0 of slot 0 in a sub-frame - Modulation scheme = QPSK PHICH: - Carries the hybrid-arq ACK/NACK feedback to the UE for the blocks received - Transmitted on symbol #0 of every sub-frame (Normal duration) and symbols #0, 1 & 2 of every sub-frame (Extended duration) if the number of PDCCH symbols = 3 - Modulation scheme = BPSK (CDM) User Equipment (UE)

8 LTE Air Interface: Downlink Physical Channels (2 of 2) Control Channel PDCCH Physical Downlink Control Channel Shared (Payload) Channel PDSCH - Physical Downlink Shared Channel Base Station (enb) PDCCH - Carries uplink and downlink scheduling assignments and other control information depending on format type (there are 4 formats) - Transmitted on the first 1, 2 or 3 symbols of every subframe - Modulation scheme = QPSK PDSCH - Carries downlink user data - Transmitted on sub-carriers and symbols not occupied by the rest of downlink channels and signals - Modulation scheme = QPSK, 16QAM, 64 QAM User Equipment (UE)

9 LTE Air Interface: Downlink Physical Signals P-SS - Primary Synchronization Signal S-SS - Secondary Synchronization Signal RS Reference Signal (Pilot) Base Station (enb) P-SS: - Used in cell search and initial synchronization procedures - Carries part of the cell ID (one of 3 sequences) and identifies 5 ms timing - Transmitted on 62 out of the reserved 72 subcarriers (6 RBs) around DC at OFDMA symbol #6 of slot #0 & #10 - Modulation sequence = One of 3 Zadoff-Chu sequences; CAZAC S-SS: - Used to identify cell-identity groups. Also identifies frame timing (10 ms) - Carries remainder of cell ID (one of 168 binary sequences) - Transmitted on 62 out of the reserved 72 subcarriers (6 RBs) around DC at OFDMA symbol #5 of slot #0 & #10 - Modulation sequence = Two 31-bit binary sequences; BPSK RS: - Used for DL channel estimation and coherent demodulation - Transmitted on every 6th subcarrier of OFDMA symbols #0 & #4 of every slot - Modulation sequence = Pseudo Random Sequence (PRS). Exact sequence derived from cell ID, (one of 3 * 168 = 504). QPSK User Equipment (UE)

10 LTE Air Interface: Uplink Physical Channels Random Access Channel PRACH - Physical Random Access Channel Control Channel PUCCH Physical Uplink Control Channel Shared (Payload) Channel PUSCH - Physical Uplink Shared Channel Base Station (enb) PRACH: - Used for call setup - Modulation scheme = u th root Zadoff-Chu PUCCH: - Carries ACK/NACK for downlink packets, CQI information and scheduling requests - Never transmitted at same time as PUSCH from the same UE - Two RBs per sub-frame, the outer RB regions, are reserved for PUCCH - Modulation scheme = OOK, BPSK and QPSK PUSCH: - Carries uplink user data - Modulation scheme = QPSK, 16QAM, 64QAM User Equipment (UE)

11 LTE Air Interface: Uplink Physical Signals DM-RS - (Demodulation) Reference Signal S-RS - (Sounding) Reference Signal Base Station (enb) DM-RS: There are two types of DM-RS. PUCCH-DMRS and PUSCH-DMRS PUSCH-DMRS: - Used for uplink channel estimation - Transmitted on SC-FDMA symbol #3 of every PUSCH slot - Modulation sequence = n th root Zadoff-Chu PUCCH-DMRS: - Transmitted on different symbols depending on PUCCH format and cyclic prefix. For normal cyclic prefix and PUCCH format 1, it is transmitted on SC-FDMA symbols #2, #3 and # 4 of every PUCCH slot. For PUCCH format 1, it is transmitted on SC-FDMA symbols #1 and 5 - Modulation sequence = Zadoff-Chu S-RS: - Used for uplink channel quality estimation when no PUCCH or PUSCH is scheduled. - Modulation sequence = Based on Zadoff-Chu User Equipment (UE)

12 Sub-Carrier (RB) Downlink Frame Structure Type 1 DL N symb OFDM symbols (= 7 OFDM Normal CP) (x Ts) CP 4 CP 5 6 CP CP CP CP etc. 1 slot = Ts = 0.5 ms The Cyclic Prefix is created by prepending each symbol with a copy of the end of the symbol Time (Symbol) sub-frame = 2 slots = 1 ms RS - Reference Signal (Pilot) P-SS - Primary Synchronization Signal S-SS - Secondary Synchronization Signal PBCH - Physical Broadcast Channel PCFICH Physical Control Channel Format Indicator Channel PHICH (Normal) Physical Hybrid ARQ Indicator Channel PDCCH (L=3) - Physical Downlink Control Channel PDSCH - Physical Downlink Shared Channel #0 #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11 #12 #13 #14 #15 #16 #17 #18 #19 1 Frame = 10 sub-frames = 20 slots = 10 ms

13 Uplink Frame Structure Type 1 PUSCH Mapping UL N symb The Cyclic Prefix is created by prepending each symbol with a copy of the end of the symbol OFDM symbols (= 7 OFDM Normal CP) (x Ts) CP 4 CP 5 6 CP CP CP CP CP etc. Ts = 1/(15000 x 2048) = 32.6 ns 1 slot = Ts = 0.5 ms 1 sub-frame = 2 slots = 1 ms PUSCH - Physical Uplink Shared Channel Reference Signal (Demodulation) [Sym 3 Every Slot] #0 #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11 #12 #13 #14 #15 #16 #17 #18 #19 1 frame = 10 sub-frames = 10 ms Page 13

14 Uplink Frame Structure Type 1 PUCCH Mapping (Formats 1, 1a, 1b ) UL N symb [Syms 0,1,5,6 Every Slot] 1 [Syms 2-4 Every Slot]

15 Comparing DL (OFDMA) and UL (SC-FDMA): QPSK example using M=4 subcarriers -1,1 Q 1, 1-1,-1-1, 1 1, -1-1,-1 1, 1 1, -1-1, 1 1,1 I Sequence of QPSK data symbols to be transmitted -1,-1 1,-1 QPSK modulating data symbols V V CP CP f c 15 khz Frequency OFDMA Data symbols occupy 15 khz for one OFDMA symbol period 60 khz Frequency SC-FDMA Data symbols occupy M*15 khz for 1/M SC-FDMA symbol periods

16 Agenda Brief review of LTE physical layer LTE physical layer Receiver tests Measurement solutions

17 LTE enb Design Challenges Increased capacity & throughput MIMO radios Requires more RF hardware Requires more complex baseband processing Requires extensive validation with channel emulation Robust error correction techniques Requires more complex baseband processing Wider modulation bandwidth Higher order modulation schemes More sophisticated power control Interference & Interoperability Must integrate with existing cellular & wireless connectivity formats

18 LTE enb Receiver Test Challenges LTE Conformance Tests Require Sophisticated Signals Various modulation bandwidths (1.4 MHz to 20 MHz) Various modulation types (QSPK, 16QAM, 64QAM) Transport channel coding with specific configurations, i.e. Fixed Reference Channels (FRC) Interfering Signals AWGN Emulation of channel propagation conditions New Conformance Tests Require Special Test Configuration Three performance requirements tests require dynamic changes in signal characteristics Closed loop control of RV index based on HARQ feedback Closed loop control of RF frame timing based on TA feedback Interference and Rx diversity tests require MU-MIMO test configurations

19 LTE enb Receiver Test Challenges enb Rx Conformance Test Details 3GPP LTE enb Rx Conformance Tests (36.141) S7. Rx Characteristics Tests Reference sensitivity level Dynamic range Adjacent Channel Selectivity (ACS) Blocking characteristics Intermodulation characteristics In-channel selectivity Spurious emissions Summary of Test Requirements Tests are performed open loop Tests require interfering signals Performance metric = BLER S8. Rx Performance Requirements Tests Performance requirements for PUSCH Multipath fading propagation conditions UL timing adjustment HARQ-ACK multiplexed on PUSCH High speed train conditions (high mobility) Performance requirements for PUCCH ACK missed detection using user PUCCH format 1a CQI missed detection for PUCCH format 2 ACK missed detection for multi user PUCCH format 1a Performance Requirements for PRACH Summary of Test Requirements Some tests require closed loop feedback Tests require fading Performance metric = Throughput (or missed detection)

20 LTE enb Receiver Test Challenges enb Conformance Tests Receiver Characteristics Receiver Characteristics Wanted Signal Interfering Signal Dynamic Range (wanted interferer) Agilent Solution 7.2 Reference Sensitivity Level 7.3 Dynamic Range 7.4 In-Channel Selectivity 7.5 Adjacent Channel Selectivity 7.5 Narrowband Blocking 7.6 Blocking (in-band) 7.6 Blocking (out-of-band) 7.6 Blocking (Co-location with other base stations) FRC A1-1, 1-2, 1-3 QPSK Mod FRC A2-1, 2-2, QAM Mod FRC 1-2, 1-3, 1-4, 1-5 QPSK Mod FRC A1-1, 1-2, 1-3 QPSK Mod FRC A1-1, 1-2, 1-3 QPSK Mod FRC A1-1, 1-2, 1-3 QPSK Mod FRC A1-1, 1-2, 1-3 QPSK Mod FRC A1-1, 1-2, 1-3 QPSK Mod None required for this test -- Signal Studio +MXG AWGN 12.4 db Signal Studio + MXG E-UTRA with all BW 21.5 db Signal Studio + MXG E-UTRA Offsets up to 2.5 MHz* E-UTRA Offsets up to 4.66 MHz* CW or E-UTRA Offsets up to 7.5 MHz* CW Offsets up to GHz CW Freq from 728 MHz to 2690 MHz 48.1 db Signal Studio + MXG 51.1 db Signal Studio + MXG 57.1 db Signal Studio + MXG + PXB 85.1 db Signal Studio + MXG + PSG db Signal Studio + MXG + MXG 7.7 Receiver Spurious Emissions NA NA NA MXA Spectrum Analyzer 7.8 Receiver Intermodulation 7.8 Receiver Intermodulation (Narrow Band Intermodulation) FRC A1-1, 1-2, 1-3 QPSK Mod FRC A1-1, 1-2, 1-3 QPSK Mod CW offset up to 7.5 MHz* & E-UTRA offset up to 18.2 MHz* CW offset up to 415 khz* & E-UTRA offset up to 1780 khz* 48.1 db Signal Studio + MXG + PXB 48.1 db Signal Studio + MXG + PXB

21 LTE enb Receiver Test Challenges enb Conformance Tests Performance Requirements Performance Requirements Wanted Signal Channel Model Channel Configuration Feedback Agilent Solution PUSCH in Multipath Fading Propagation Conditions FRC A3, A4, A5 QPSK, 16QAM, 64QAM EPA 5 Hz EVA 5, 70 Hz ETU 70, 300 Hz 1x2 (2x RX diversity) 1x4 (4x RX diversity) HARQ Real-time UL Timing Adjustment FRC A7, A8 QPSK & 16QAM (SRS is optional) Moving Propagation Model a. ETU 200 Hz b. AWGN 2x2 (2x RX diversity) 2x4 (2x RX diversity) (Stationary & moving UE) HARQ & timing adjustment Real-time + Waveform Playback HARQ-ACK Multiplexed on PUSCH FRC A3-1, A4-3 to A4-8 QPSK, 16QAM ETU 70 Hz 1x2 (2x RX diversity) -- Waveform Playback High Speed Train Conditions FRC A3-2 to A3-7 QPSK (PUCCH is optional) High Speed Train with: a. Open Space b. Tunnel for multi-antenna 1x2 (2x RX diversity) 1x4 (4x RX diversity) HARQ Real-time ACK Missed Detection for Single User PUCCH Format 1a PUCCH ACK EPA 5 Hz EVA 5, 70 Hz ETU 70, 300 Hz 1x2 (2x RX diversity) 1x4 (4x RX diversity) -- Real-time or Waveform Playback CQI Missed Detection for PUCCH Format 2 PUCCH CQI ETU 70 Hz 1x2 (2x RX diversity) 1x4 (4x RX diversity) -- Real-time or Waveform Playback ACK Missed Detection for Multi User PUCCH Format 1a PUCCH ACK ETU 70 Hz 4x2 (2x RX diversity) (Requires 3 interferers) -- Waveform Playback PRACH False Alarm Probability and Missed Detection PRACH Preamble ETU 70 Hz AWGN (no fading) 1x2 (2x RX diversity) 1x4 (4x RX diversity) -- Waveform Playback

22 LTE enb Receiver Test Challenges R&D Lifecycle RX Test Considerations Test Solution Implications RF Front End Verification Linearity, EVM, Noise Figure, LO phase noise Simple signals (i.e., CW or statically correct) for initial RX testing Baseband Chipset Development BER/BLER measurements Transport channel coding Baseband Chipset Development Functional verification Advanced feature set for testing HARQ, etc Baseband Chipset Development Verify performance in real-world conditions Real-time channel emulation (fading) Calibrated AWGN Baseband Chipset Development Rx Diversity Multiple synchronized baseband generators RF & Baseband Integration Verify performance in real-world conditions Real-time channel emulation (fading) Calibrated AWGN System Design Validation Interference tests Simulation of modulated or CW signals System Design Validation Interoperability tests Simulation of multiple cellular formats Pre-Conformance Test AWGN, Channel Emulation, HARQ, Timing Adjustments, transport channel coding Complex signaling with closed loop feedback from the enb

23 Agenda Brief review of LTE physical layer LTE physical layer Receiver tests Measurement solutions

24 Agilent 3GPP LTE Test Solutions Rx RF Front End Verification Signal Studio - Uplink FDD LTE - ARB basic capability MXA Signal Analyzer Generate simple test signals Create CW signals Create multi-tone signals Generate simple LTE signals Ultimate physical layer flexibility Supports December 2009 version of LTE standard Selectable BW from 1.4 MHz to 20 MHz Select PUSCH modulation: QSPK, 16QAM, 64QAM Configurable data payloads Allocate resource blocks in frequency & time MXG Vector Signal Generator Analog I/Q, Digital I/Q, DigRF RF Receiver Front End Measure basic RF parameters Analyze amplitude flatness Measure gain at each stage Analyze phase linearity Determine noise figure Measure EVM of components & subsystems

25 Agilent 3GPP LTE Test Solutions Rx Baseband Verification Signal Studio Uplink FDD LTE ARB advanced capability Generate sophisticated LTE signals Supports December 2009 version of LTE standard Transport channel coded PUSCH with frequency hopping (inter and intra & inter subframe hopping) Uplink control multiplexing with PUSCH Process based frame configuration Test incremental redundancy with retransmitted processes (HARQ) MXG Vector Signal Generator Sounding Reference Signal with frequency hopping Demodulator I Q Baseband Filter I Q Symbol Decoder Transport Channel Decoding Output to Higher Layers Baseband Subsection

26 Agilent 3GPP LTE Test Solutions Rx BB/RF Integration & System Test MXG Vector Signal Generators RX Diversity First To Market Track Record Keeping pace with evolving LTE standard Supports both FDD & TDD frame structures Supports December 09 version of LTE standard Beta program for latest changes to standard Tx0 h00 h01 Rx0 Rx1 Scalable Test Solutions Tailor capability & performance from SISO to MIMO Easily upgrade as your test needs evolve PXB BBG & Channel Emulator Multi-format application support for interoperability / interference testing - LTE, W-CDMA/HSPA, GSM/EDGE, cdma2000, 1xEV-DO, WiMAX, WLAN Signal Studio High Performance Real-time uplink LTE signal creation Real-time MIMO channel emulation Page 26 Simplified power calibration Wide bandwidth ready for LTE Advanced (Rel 10)

27 Agilent 3GPP LTE Test Solutions Interference and Interoperability Test PXB BBG & Channel Emulator MXG Vector Signal Generator Interoperability testing Signal Studio Configuration flexibility Create (SS): LTE, W-CDMA/HSPA, GSM/EDGE, cdma2000, 1xEV-DO, WiMAX, WLAN Up to four internal baseband generators Sum CW carriers with wanted signal Sum modulated carriers with wanted signal Sum custom Matlab waveforms with wanted signal Add calibrated AWGN for accurate C/N ratios Scalable Test Solutions Tailor capability & performance from SISO to MIMO Easily upgrade as your test needs evolve Connect to ESG, MXG, & DSIM for signal creation Connect to MXA for RF fading applications Field upgradable with calibrated DSP blocks High Performance Real-time uplink LTE signal creation Real-time MIMO channel emulation Simplified power calibration Wide bandwidth ready for LTE Advanced (Rel 10)

28 Agilent 3GPP LTE Test Solutions Rx Conformance Test Signal Studio Uplink FDD LTE Real-time capability Real-time LTE Signal Generation PXB accepts closed loop feedback HARQ ACK/NACK signals Timing adjustment feedback LTE signal continuously adjusted based on feedback Predefined Fixed Reference Channel definitions PXB BBG & Channel Emulator Feedback enb Real-time Channel Emulation Standards based channel models Custom defined channel models 24 paths of fading 120 MHz modulation bandwidth Simplified power calibration Digital I/Q MXG Vector Signal Generator RF Interfering Signals Add CW blocking signals Add modulated signals for blocking &interoperability test Calibrated AWGN for accurate C/N ratios

29 HARQ / Incremental Redundancy Concepts Original data Coding Rate Matching i.e., 1/3 CC and then RM to make Block Size Match Radio Frame IR Buffer in Receiver RV Index=0 1 st TX Effects of Propagation RV Index=1 RV Index=2 2 nd TX 3 rd TX NACK NACK ACK

30 HARQ RV Index Test Assignments Example of how RV Index works Maximum RV Index sequence length is 15 in software The RV Index sequence is user definable. RV Index value can range from 0 to RV Index Sequence Process # HARQ Response RV Index 0 ACK 0 1 ACK 0 2 ACK 0 3 ACK 0 7 NACK 1 0 NACK 1 0 NACK 2 RV Index 0 is used for each ACK response RV Index is incremented for each process for each NACK response using defined sequence shown at left of slide HARQ feedback can be from external CMOS 3.3 V or RS-232 input into PXB, or from a predefined programmable ACK/NACK sequence. 0 NACK 3 0 ACK 0 RV Index reset to 0 after receiving n NACKs to reach end of RV Index Sequence or when ACK is received

31 Timing Adjustment Conformance Test Concept enb Timing Adjustment transmitted back to UE, to align UE with enb frame timing 1 symbol (2048 Ts) Normal Cyclic Prefix Resource Blocks Details Stationary UE and moving UE transmit in same subframe, but with different subcarriers Moving UE simulates changing propagation path lengths & therefore different arrival times at enb enb must command moving UE to advance or delay timing of transmission such that the signal arrives at enb with proper frame timing, i.e. does not overlap into adjacent symbols Timing adjustment test is performed with even subfames occupied Sounding Reference Signal (SRS) is optional for this test This test is performed with real-time HARQ feedback enb Frame Timing Stationary UE Moving UE simulates changing propagation path lengths In this example, the mobile UE is assigned blue Resource Blocks Moving UE signal can arrive at wrong enb frame timing as path length changes UE transmission interferes with next symbol without timing adjustment

32 PXB Closed Loop Test Concept HARQ & Timing Adjustment Tests Throughput Testing Equipment Configuration Signal Studio N7624B 3GPP LTE FDD N5106A PXB CMOS 3.3 V inputs from enb HARQ Level triggered or serial data Timing Adjustment serial data Feedback can be multiplexed into one line HARQ ACK/NACK Timing Adjustment Frame Pulse 10MHz enb LAN GPIB 10MHz Digital I/Q Baseband w/ Fading N5182A MXG RF Dynamically Changing RF Frame Timing based on TA RV Index based on ACK/NACK

33 Typical Conformance Test Configurations UL Timing Adjustment Configuration 2x2 MIMO case Signal Studio ARB LTE (Stationary UE) Signal Studio Real-time LTE (Moving UE) HARQ ACK/NACK Timing Adjustment CMOS 3.3V Signals enb PXB Digital IQ MXG RF Digital IQ RF 2x4 MIMO case Signal Studio ARB LTE (Stationary UE) Signal Studio Real-time LTE (Moving UE) CMOS 3.3V Signals HARQ ACK/NACK & Timing Adjustment RF enb PXB RF Digital IQ RF RF

34 Typical Conformance Test Configurations Multi-User PUCCH Test - 4x2 MIMO Case Agilent Configuration Signal Studio ARB LTE (Wanted UE) PXB Digital IQ MXG RF enb Digital IQ RF Signal Studio ARB LTE (Interfering UE s) Note: Closed loop feedback not required for this test

35 Agilent N5106A PXB Baseband Generator & Channel Emulator Performance & Scalability to Meet Future Testing Needs Signal Inputs Signal Creation Tools Signal Outputs Analog I/Q - Direct from PXB - Connect to any DUT or RF vector signal generator with analog I/Q inputs RF Digital I/Q RF N5102A MXA Page 35 PXB ESG or MXG

36 Agilent Solutions Addressing enb LTE Test Challenges Today N7624B/25B Signal Studio for 3GPP LTE FDD/TDD Real-time LTE signal creation options Creates all required wanted signals for Receiver Characteristics Creates all required wanted signals for Performance Requirements (including closed loop requirements) Waveform playback LTE options Ultra flexible parameter adjustment for R&D troubleshooting Perform conformance tests without closed loop control N5106A PXB Baseband Generator and Channel Emulator Adds real-time channel emulation (fading) Creates interfering LTE and CW signals (and other formats) Adds calibrated AWGN to signal Creates MIMO-like configurations (fading + summing, etc) Adds real-time baseband generator for LTE software N5182A MXG vector signal generator Upconverts LTE baseband signal with interferers and channel emulation from PXB to RF Used stand-alone (without PXB) with Signal Studio waveform playback options Signal Studio Uplink LTE Real-time capability PXB BBG & Channel Emulator MXG Vector Signal Generator

37 Agilent Solutions Key Benefits Most Cost Effective enb Rx Testing Leverage existing ESG/MXG investments Easily scale to higher order MIMO configurations Prepare for evolving LTE standard including IMT Advanced The Fastest Time to Market Perform all enb Rx conformance tests now including closed loop requirements Supports December 2009 version of LTE standard Predefined setups for required Fixed Reference Channels (FRC) and fading models Flexible parameter adjustments for troubleshooting problems Dedicated LTE application engineer support available Best Way to Minimize LTE Design Uncertainties and Rework More robust design validation early in the R&D lifecycle Consistent test signals from BB to RF

38 Thank You! Questions?