AND/OR ITS SUPPLIERS. THIS INFORMATION CARRIER CONTAINS PROPRIETARY INFORMATION WHICH SHALL NOT BE USED, REPRODUCED OR DISCLOSED TO THIRD PARTIES WITHOUT PRIOR WRITTEN AUTHORIZATION BY AND/OR ITS SUPPLIERS, AS APPLICABLE. www.thalesgroup.com Spectrum sharing, door radar & mobiel breedband Maarten Clement Nationaal Frequentie Overleg (NFO), Den Haag, 30 oktober 2013 Oktober 2013 Unclassified
Presentation Overview Introduction on Thales Nederland Antenna integration by Thales Frequency sharing of radar with IMT Interference from IMT to L-band radar Interference from L-band radar to IMT Conclusions
Radar bands below 6 GHz NL Frequency Map L-band S-band C-band Long range radar Medium range radar Short range radar
Interference from LTE to a generic radar Source: LTE cell size = 5 km Monte Carlo Simulations random variation of parameters
Co-channel sharing Separation Distance for LTE BW = 5 MHz Separation Distance Generic ITU Generic ITU Generic ITU Radar 1 Radar 2 Radar 5 215 km 270 km 255 km for LTE BW = 20 MHz 194 km 245 km 235 km Separation Distance: Probability I/N< -6dB < 0,5%
Spurious Emissions According ETSI ETSI TS 136 104 V11.4.0 (2013-04) Category A: -13 dbm per 1 MHz band Category B: -30 dbm per 1 MHz band Emission Mask
Sepration distance to RADAR 1 (Km) Compatibility in 1300-1400 MHz band 30 RADAR 1 minimum separation distance for a probability of a LTE interfering signal (irss) not respecting the condition I/N<-6 db closed to 0.5% 25 20 15 10 5 Regular 3GPP spectrum mask 3 GPP spectrum mask - 10 db 3 GPP spectrum mask - 20 db 0 0 10 20 30 40 50 60 70 80 Frequency separation (MHz)
Summary EMI LTE to generic radar Co-channel sharing between Radiolocation Service and the Downlink of Mobile Service or a TDD-network is not feasible Also no compatibility is obtained in the 1300-1400 MHz band when using a regular 3GPP LTE spectrum mask according ETSI TS 136 104, category B. When applying 20 db additional Tx filtering for the mobile system and a frequency separation >20 MHz the required separation distances are reduced to about 3 km.
Interference from L-band radar to LTE Source: L-band radars: used for detection at long distance Both naval and land-based
Co-channel sharing with base station Required separation distance to prevent co-channel interference to LTE Base Station Antenna Main Beam Antenna Side lobes Required Separation Distance 130 km 95 km
Overall compatibility in radar band Frequency separation: 30 to 100 MHz Required separation distance to LTE Base Station Blocking Spurious / Phase Noise Antenna Main Beam 30 km 45 km Antenna Side lobes 14 km 22 km
Summary EMI L-band radar to LTE Co-channel sharing between L-band radar and the LTE uplink is not feasible. Also no compatibility is obtained in the operational band of L-band radar when using current (typical) specificaions for blocking and spurious emissions.
Overall Conclusions Co-channel sharing between Radiolocation Service and the Mobile Service or a TDD-network is not feasible. Also no compatibility is obtained in the operational-band of the investigated L-band radar systems when using current (typical) specificaions for blocking and spurious emissions
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