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Federal Aviation Administration Radio Frequency Interference Mike Biggs Senior Engineer US FAA Spectrum Engineering Services Regional Preparatory Workshop.

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Presentation on theme: "Federal Aviation Administration Radio Frequency Interference Mike Biggs Senior Engineer US FAA Spectrum Engineering Services Regional Preparatory Workshop."— Presentation transcript:

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2 Federal Aviation Administration Radio Frequency Interference Mike Biggs Senior Engineer US FAA Spectrum Engineering Services Regional Preparatory Workshop for WRC-15 Lima, Peru March 12, 2013

3 2 Federal Aviation Administration What is Radio Frequency Interference (RFI)? ITU Definition: The effect of unwanted energy due to one or a combination of emissions, radiations, or inductions upon reception in a radiocommunication system, manifested by any performance degradation, misinterpretation, or loss of information which could be extracted in the absence of such unwanted energy. Criteria to mitigate inter-system interference are established as an element of ICAO SARPs. –E.g., 8 dB D/U for co-channel DME assignments

4 3 Federal Aviation Administration US RFI Yearly Activity Statistics ICAO Regional Preparatory Workshop for WRC-15 March 2013 Maintenance Management System (MMS) Data Event Manager System (EMS) Data Spectrum RFI Tracking System (RFIT) Data

5 4 Federal Aviation Administration RFI Categories Authorized Transmissions Authorized Transmissions Properly Licensed (i.e. FM, AM, TV) Unauthorized Transmissions Unauthorized Transmissions Wireless Video Cameras High Power Cordless Telephones Unlicensed Pirate FM Stations Spurious Intentional Intentional Unauthorized Jamming Phantom Controllers Unintentional Unintentional Spurious Transmissions ICAO Regional Preparatory Workshop for WRC-15 March 2013

6 5 Federal Aviation Administration RFI Sources Citizens Band (CB) Radios (5 th harmonic) Citizens Band (CB) Radios (5 th harmonic) Paging Systems Paging Systems Stuck Microphone Transmissions Stuck Microphone Transmissions Cell phone Spurious Emissions Cell phone Spurious Emissions Electronic Attack (EA) Missions Electronic Attack (EA) Missions Power line Noise (Broadband Noise) Power line Noise (Broadband Noise) Anomalous Propagation Anomalous Propagation Atmospheric Conditions Atmospheric Conditions Amateur HAM Radio Amateur HAM Radio Land Mobile/Dispatch Land Mobile/Dispatch ICAO Regional Preparatory Workshop for WRC-15 March 2013

7 6 Federal Aviation Administration US National Airspace System RFI ICAO Regional Preparatory Workshop for WRC-15 March 2013 Most Common Source of RFI: Most Common Source of RFI: Unauthorized Transmissions Pirate FM Broadcast Spurious Most Common FAA Victim: Most Common FAA Victim: VHF/UHF Voice Communications Most Difficult RFI to Resolve: Most Difficult RFI to Resolve: High Altitude Pilot Only Reported RFI Intermittent RFI (Airborne/Ground) Broadband RFI on Many Frequencies Phase Shift Keying RF Transmissions

8 7 Federal Aviation Administration US RFI Investigation Resources FAA Personnel and Organizations: FAA Personnel and Organizations: ATO Spectrum Engineering Services ATO Spectrum Engineering Services Headquarters Headquarters Technical Center Technical Center Command Center Command Center Frequency Management Officers (FMO) Frequency Management Officers (FMO) Technical Operations Service Areas Technical Operations Service Areas Aeronautical Center Aeronautical Center Technical Support Field Specialists (Technicians) Technical Support Field Specialists (Technicians) Aviation System Standards (Flight Inspection) Aviation System Standards (Flight Inspection) One International FIO One International FIO Six National FIOs Six National FIOs ICAO Regional Preparatory Workshop for WRC-15 March 2013

9 8 Federal Aviation Administration Automated or Manual Full Equipment Suite DF Control/Mapping MHz Regional Used mainly by FMOs Most Complete Measurement System RFI Investigation Resources FAA Assets and Software Tools FAA Assets and Software Tools Radio Frequency Interference Monitoring (RFIM) Vans Radio Frequency Interference Monitoring (RFIM) Vans ICAO Regional Preparatory Workshop for WRC-15 March 2013

10 9 Federal Aviation Administration 29 RFID Systems GPS DF Antenna L MHz Regional Automated Vehicle mounted mobile DF Detection Band MHz Portable DF (RFID) ICAO Regional Preparatory Workshop for WRC-15 March 2013

11 10 Federal Aviation Administration Regional Most Cost effective First choice instrument for technicians Approx. 300 K Systems GPS DF Antenna L1,L2,L5 VHF Yagi Antenna Directional Regional System Management Office (SMO) 33 Offices in the NAS K Detection Coverage 20 – 3000 MHz Typically 2 miles Handheld DF (K95-103) ICAO Regional Preparatory Workshop for WRC-15 March 2013

12 11 Federal Aviation Administration DF Control/Mapping Operated Automation GPS DF Array & VHF DF Array L1,L2,L5 & MHz AVN Flight Check NASE/RFI Program to assist in locating RFI/GPS sources First Choice when High Altitude PIREPS ONLY Airborne DF ICAO Regional Preparatory Workshop for WRC-15 March 2013

13 12 Federal Aviation Administration FAA Assets and Software Tools FAA Assets and Software Tools Los Angeles (LAX), Chicago (ORD), New York (JFK), Miami (MIA) FAA Intranet Web based Graphical User Interface (GUI) Web Browser Control of Fixed DF and Spectrum Analyzer New York NIMDS Miami NIMDS Master IMDS Chicago NIMDS Los Angeles NIMDS National RFI Initiative ICAO Regional Preparatory Workshop for WRC-15 March 2013

14 13 Federal Aviation Administration WEB IMDS Receiver Tuned Frequency DF Processor Bearing Averaging Triangulation Multiple Audio Playback Capability Synchronized Spectrum Analyzer Spectral View Interference Monitoring Detection System (IMDS) ICAO Regional Preparatory Workshop for WRC-15 March 2013

15 14 Federal Aviation Administration WEB IMDS Triangulated Bearing Averages Overlay on Map Increases Fix Calculation Ellipse Accuracy Multiple Ellipse Calculation for Smaller Ellipse Mapping Triangulation ICAO Regional Preparatory Workshop for WRC-15 March 2013

16 15 Federal Aviation Administration Flight Explorer ASD Aircraft Situation Display (ASD) Traffic Flow of potential aircraft PIREPS RLOS Footprint Lowest Aircraft Altitude VENN Diagram Overlay Area ICAO Regional Preparatory Workshop for WRC-15 March 2013

17 16 Federal Aviation Administration Audio Detection Visual Intensities Used for Matching with known sources Audio Spectral Views Audio Spectrogram Analysis ICAO Regional Preparatory Workshop for WRC-15 March 2013


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