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Test Plan for Impact of LTE Signals on GPS Receivers Project
NASCTN convened a panel of technical experts, from NIST and NTIA, to develop a test plan that would meet the objectives of this project:
- Develop a repeatable, calibrated, and well-documented test methodology to investigate the impact of adjacent-band LTE transmissions on GPS receivers operating in the L1 frequency band
- Collect data on a representative subset of available GPS devices in order to validate the proposed test methodology.
In May of 2016, NASCTN distributed a draft test plan and feedback form to a cross-section of GPS manufacturers, Federal agencies and spectrum regulators to obtain feedback on the proposed methodology.
Over a two-month period, NASCTN received 159 comments from the following spectrum regulators, Federal agencies, GPS manufacturers and members of the general public:
- Federal Communication Committee (FCC)
- National Telecommunications & Information Administration (NTIA)
- U.S Department of Transportation (DOT)
- National Aeronautics and Space Administration (NASA)
- U.S. Air Force Space Command (AFSPC)
- U.S. Air Force Spectrum Management Office (AFSMO)
- Deere & Company*
- Garmin Ltd.
- Honorable John Stenbit, Dr. Brad Parkinson, Dr. John Betz
- Mr. Larry Chesto
The NASCTN test team reviewed the comments and developed a revised test plan in July of 2016 that addressed the technical issues raised in the comments. The adjudicated comments are not attributed to any specific organization or individual.
*The comments submitted by Deere & Company were non-technical in nature and were not included in the comment adjudication. However, Deere & Company filed these comments to the FCC.
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