1. 1 15/03/2016 VDL Mode 4 Co-Site Investigations Part I Co-Site Interference Scenarios Bertrand DESPERIER ISA TELECOMS

2. 2 15/03/2016 Problem Overview and Study Objectives  Characterize air co-site scenarios considered to be representative of real and anticipated operational cases  VDL Mode 4 & AM  VDL Mode 4 & VDL Mode 2  Both point to point and broadcast VDL Mode 4 usage are addressed  Prepare the elaboration of detailed testing plan according to the identified scenarios  Explore operational quality of service requirements to identify related interference criteria

3. 3 15/03/2016 How to build a Scenario ?  Victim system  User Profile: in time & size distribution (G/A or A/A)  Received victim power  Interferer system  User : in time & size distribution (A/G or A/A)  Interferer power at the victim receiver input  Frequency separation from victim channel

4. 4 15/03/2016 How to build a scenario ? Airborne type : Antenna coupling Feeder Loss (Tx, Rx) Co-site Interferer system power Interferer Power @ victim receiver input Spectrum: ICAO FMG Frequency planning Applications classes in use: Broadcast Point to point Technologies properties: Network overheads Access Mode… Interferer Channel occupancy profile Victim Channel occupancy profile Frequency Separation Typical flight: Flight phase On event application triggering Victim Power @ victim receiver input Operational Scenario Testing Scenario

5. 5 15/03/2016 Interferer Power Interferer LargeSmallLight SameOpp.SameOpp.SameOpp. Isolation (dB)355019451737 Rx Feeder loss (dB)333 Total Losses (dB)-38-53-21-49-20-40 Voice Tx Power (dBm)464240 Interferer power at receiver input (dBm) 8-721-7200 VDL4 Tx Power (dBm)434037 Interferer power at receiver input (dBm) 5-10181417-3

6. 6 15/03/2016 Usage Profiles  AM profile are based on real data (Erctl voice profile study)  4 categories of Data Link profiles have been defined  Ground to Air Surveillance broadcast (TIS-B)  Air Surveillance broadcast (ADS-B)  Sporadic point to point (CPDLC, CM, FIS, D-SIGMET, NOTAM, FLIPCY,DYNAV …)  Periodic point to point (ADS-C, CAP…)

7. 7 15/03/2016 Minimum victim signal level DSB-AM From ground DSB-AM From air VDL 4 From ground VDL 4 From air VDL 2 From ground Min signal at air receiver antenna Annex 10, Vol. III 75  V/m -82 dBm 75  V/m -82 dBm 75  V/m -82 dBm 35  V/m -88 dBm 75  V/m -82 dBm Feeder loss3 dB Antenna gain0 dB Minimum victim signal at receiver input -85 dBm -91 dBm-85 dBm

8. 8 15/03/2016 Spectrum DSB-AMVDL4VDL 2 VDL4 (Assumed based on current VDL2 To be revisited ) 4 Channels 100 kHz 1 Channel 25 kHz VDL2 4 Channels 100 kHz 1 Channel 25 kHz 1 Channel 25 kHz  Current Required guard band