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
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Empirical compatibility assessment in Poland LTE causes interference to ARNS Mateusz Berlik Office of Electronic Communications, Poland Department of Frequency.
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Empirical compatibility assessment in PolandLTE causes interference to ARNS
Mateusz BerlikOffice of Electronic Communications, Poland
Department of Frequency Resources Management
ITU Regional Seminar for Europe and CIS CountriesWarsaw, 7 - 9 May 2012
Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012
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
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
Introduction to the LTE vs. ARNS problemWRC-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
Introduction to the LTE vs. ARNS problem
Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012
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
Introduction to the LTE vs. ARNS problem
Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012
Introduction to the LTE vs. ARNS problem
Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012
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
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
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
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
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
Scenario
LTE terminal/signal generator ARNS ground station
Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012
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
RSP-10 Radar system (RLS1)
Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012
RSP-10 Radar system (RLS1)
Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012
RSP-10 Radar system (RLS1)
Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012
RSP-10 Radar system (RLS1)
Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012
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
Military base15-16.02.201130.03.2011
Military airfield17-18.02.2011
Mateusz Berlik, UKE :: Warsaw, 7 - 9 May 2012
Measurement I (Toruń, 15-16.02.2011)
• The radar under maintenance works;• Direct connection to the radar receiver.