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GPS-ABC radiated chamber testing overview and results : GPS-ABC Workshop VI : RTCA Washington, DC, March 30, 2017.
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2017-03-30
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Abstract:This presentation, which was given during the GPS-ABC Workshop VI in Washington, DC on March 30, 2017 details the authors' radiated testing protocols and results. GPS receiver testing was carried out April 25-29, 2016 at the Army Research Laboratory's (ARL) Electromagnetic Vulnerability Assessment Facility (EMVAF), White Sands Missile Range (WSMR), NM. Participation included DOT’s federal partners/agencies (USCG, NASA, NOAA, USGS, and FAA) and GPS manufacturers. Air Force/GPS Directorate conducted testing week of April 18th. 80 receivers were tested representing six categories of GPS/GNSS receivers: General Aviation (non certified), General Location/Navigation, High Precision & Networks, Timing, Space Based, and Cellular. Tests performed in the anechoic chamber include: Linearity (receivers CNR estimators are operating in the linear region) - 1 MHz Bandpass Noise (Type 1); - 1 MHz In-Band Noise (Type1); - 10 MHz Long Term Evolution (LTE) (Type 2); - Intermodulation (effects of 3rd order intermodulation). The test results can be summarized as follows: 1 MHz AWGN and 10 MHz LTE interference signals ITM bounds were produced for all emulated GNSS signals; most bounding ITMs showed little sensitivity to interference signal types (AWGN (1 MHz) and LTE (10 MHz)); certified aviation receiver mask did not bound the masks of the 6 civil receiver categories; and in-band interference 1-dB degradation levels were consistent with expectation (-110 to -120 dBm/MHz for the L1C/A ITMs).
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Content Notes:Presentation slides from GPS Adjacent Band Compatibility Assessment Workshop VI, March 30, 2017: https://www.transportation.gov/pnt/gps-adjacent-band-compatibility-assessment-workshop-vi
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[PDF-2.69 MB]
