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Empirical compatibility assessment in Poland LTE causes interference to ARNS

Empirical compatibility assessment in Poland LTE causes interference to ARNS. Mateusz Berlik Office of Electronic Communications, Poland Department of Frequency Resources Management ITU Regional Seminar for Europe and CIS Countries Warsaw, 7 - 9 May 2012. Agenda.

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Empirical compatibility assessment in Poland LTE causes interference to ARNS

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  1. Empirical compatibility assessment in PolandLTE causes interference to ARNS Mateusz Berlik Office of Electronic Communications, Poland Department of Frequency Resources Management ITU Regional Seminar for Europe and CIS Countries Warsaw, 7-9 May 2012

  2. Agenda • Introduction to the LTE vs. ARNS problem • Aims and conditions of the measurements • Radio systems under tests • Measurements action • Summary Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  3. Agenda • Introduction to the LTE vs. ARNS problem • Aims and conditions of the measurements • Radio systems under tests • Measurements action • Summary Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  4. Introduction to the LTE vs. ARNS problem WRC-12 AI 1.17 - to consider results of sharing studies between the mobile service and other services in the band 790-862 MHz in Regions 1 and 3, in accordance with Resolution 749 (WRC-07), to ensure the adequate protection of services to which this frequency band is allocated, and take appropriate action. MOBILE FIXED BROADCASTING ARNS Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  5. Introduction to the LTE vs. ARNS problem Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  6. Introduction to the LTE vs. ARNS problem • Two approaches proposed by CPM-12: • coordination distances: 125 – 515 km (depending on ARNS system and scenario) • coordination field strength triggers • aggregate values – eg. 13 dBµV/m @ 10m in 6 MHz RBW for RLS1 radar; • single values – eg. -24.24 dBµV/m @ 10m for ARNS terrestrial station Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  7. Introduction to the LTE vs. ARNS problem Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  8. Introduction to the LTE vs. ARNS problem Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  9. Agenda • Introduction to the LTE vs. ARNS problem • Aims and conditions of the measurements • Radio systems under tests • Measurements action • Summary Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  10. Aims of the measurements: • to analyse an impact of the LTE system on the radar system; • to determine/assess the maximum level of the interfering signal. Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  11. What did we have? • 4 ARSN systems operating in Poland; • agreement of the army on measurements (with some restrictions); • LTE test terminals (provided by the operator); • LTE signal generator (provided by Nokia Siemens Networks Poland); • ARNS’s system operators/service staff. Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  12. What did we NOT have? • detailed knowledge about the ARNS systems; • documentation of the ARNS systems; • specialists in old ARNS systems; • compatibility criteria(!). Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  13. Agenda • Introduction to the LTE vs. ARNS problem • Aims and conditions of the measurements • Radio systems under tests • Measurements action • Summary Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  14. Scenario ARNS ground station LTE terminal/signal generator Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  15. Object of the measurements • RSP-10 MN-1 radar system: • primary (RLS1) / secondary (RLS2) radar; • only RLS1 module currently in use; • radiolocator for traffic controllers; • less than 100 km operational radius; • is going to be replaced by modern systems. Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  16. RSP-10 Radar system (RLS1) Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  17. RSP-10 Radar system (RLS1) Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  18. RSP-10 Radar system (RLS1) Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  19. RSP-10 Radar system (RLS1) Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  20. Agenda • Introduction to the LTE vs. ARNS problem • Aims and conditions of the measurements • Radio systems under tests • Measurements action • Summary Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  21. Military airfield 17-18.02.2011 Military base 15-16.02.2011 30.03.2011 Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  22. Measurement I (Toruń, 15-16.02.2011) • The radar under maintenance works; • Direct connection to the radar receiver. Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  23. Measurement I (Toruń, 15-16.02.2011) Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  24. Measurement I (Toruń, 15-16.02.2011) Pol H: E = 24.6dBμV/m Pol V: E = 48.6dBμV/m Sensitivity: -92.3 dBm Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  25. Measurement II (Malbork, 17-18.02.2011) • Operating radar used by military airfield in Malbork Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  26. Measurement II (Malbork, 17-18.02.2011) • The radar in „receive-only” mode: • very optimistic results (allowable interference > 50 dBµV/m); • Received interference’s level dramatically higher when it works in regular „send-and-receive” mode; • there was no ability to repeat the measurements. Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  27. Measurement III (Toruń, 30.03.2011) • Operating radar (after maintenance works); • Measurements similar to ones performed in Malbork; • LTE terminals as interfering transmitters. Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  28. Measurement III (Toruń, 30.03.2011) Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  29. Measurement III (Toruń, 30.03.2011) Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  30. Agenda • Introduction to the LTE vs. ARNS problem • Aims and conditions of the measurements • Radio systems under tests • Measurements action • Summary Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

  31. Summary • Because of the lack of the technical compatibility criteria, it was difficult to use the results as a point in discussion. • General conclusions: • LTE terminal does really interfere RSP-10 radar; • allowable interference field strength is probably higher than protection level from the CPM-12 Report. • The results were useful for our administration. Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012

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