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In-band emission in purely passive bands: some examples with the Ultra Wide Band transmission

In-band emission in purely passive bands: some examples with the Ultra Wide Band transmission. Current studies. 2002 : Creation of TG 1/8 CEPT : SE 24 followed this year by TG 3 Preliminary draft ECC report on UWB impact on other services below 10.6 GHz 1 400-1 427 MHz

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In-band emission in purely passive bands: some examples with the Ultra Wide Band transmission

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  1. In-band emission in purely passive bands: some examples with the Ultra Wide Band transmission

  2. Current studies 2002 : Creation of TG 1/8 CEPT : SE 24 followed this year by TG 3 Preliminary draft ECC report on UWB impact on other services below 10.6 GHz 1 400-1 427 MHz 6 425-7 250 MHz 10.6-10.7 GHz

  3. Passive SensorsCharacteristics Protection requirement EESS (passive): 1 400-1 427 MHz: -158.3 dBm/MHz with a sensitivity of 0.05 K, 1 400-1 427 MHz : -165.3 dBm/MHz with a lower sensitivity of 0.01 K , 6 425-7 250 MHz : -159 dBm/MHz, 10.6-10.7 GHz: -156 dBm/MHz. Recommendation ITU-R SA.1029-2 Receiver antenna gain : 9 to 45 dBi

  4. UWB Characteristics

  5. Interference Scenario Aggregate interference : methodology : NTIA, FANTASMA Free space propagation + indoor usage

  6. Results of interference analysis

  7. Results of interference analysis Band 1400 – 1427 MHz

  8. -41.3 dBm/MHz Results of interference analysis Band 6425 – 7250 MHz

  9. Results of interference analysis Band 10.6 – 10.7 GHz

  10. Proposed UWB PSD limits to ensure compatibility -88 dBm/MHz -62 dBm/MHz -60 dBm/MHz

  11. Apportionment of interferences Rec ITU-R SA.1029-2 : Interference criteria for satellite passive remote sensing Maximum level of interference on an aggregate basis To use them as single entry criteria underestimate the aggregate impact on passive services Necessity to apportion the criteria among different interference sources

  12. Apportionment of interferences Example in the band 1 400 – 1 427 MHz WP 8D has considered a 5% apportionment for unwanted emissions For bands under 5.340 the apportionment should be very small Idea within WP 7C : apportionment of 1 to 5% for UWB.

  13. Case of RR No.5.340 5.340 All emissions are prohibited in the following bands: (WRC-2000) Questionned by lawyers RR No. 4.4 Rules of Procedures UWB are not spurious or unwanted emissions

  14. Thanks for your attention Any questions ?

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