Assessment of camera capture for GPS RFI monitor

Chun Kai Feng, Thomas Johnson, Shau-Shiun Jan, Dennis Akos

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


Today, the global positioning system (GPS) has become the enabling technology of the communication, navigation, surveillance, and air traffic management (CNS/ATM) systems. However, the transmitting power of a GPS signal is extremely low and thus vulnerable to intentional or unintentional radio frequency interference (RFI). Therefore, this paper proposes a terrestrial GPS RFI monitor to identify a possible RFI source to reduce the impact on aviation operation. Each GPS RFI monitor includes a software receiver with either an automatic gain control (AGC) based or a modified energy based RFI detector in order to detect possible interference. The GPS RFI monitor also includes a camera to record the corresponding video stream simultaneously with a RFI event. If a GPS RFI device is present, the RFI monitor and camera will be triggered. Once the detector has been triggered, the associated intermediate frequency (IF) data and video stream are saved. This makes it possible to identify the characteristics of the possible GPS RFI device and to determine the time as well as the impact of the RFI event. In this paper, the recorded GPS IF signal is first processed to draw the time-frequency figures to evaluate the characteristics of the possible GPS interference, and then processed by a software-defined radio (SDR) receiver to assess the impact on positioning. The results from previous studies are compared with several RFI detectors whose detection schemes are presented in this paper as well.

Original languageEnglish
Title of host publicationProceedings of the 2014 IEEE/ION Position, Location and Navigation Symposium, PLANS 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages10
ISBN (Print)9781479933204
Publication statusPublished - 2014 Jan 1
Event2014 IEEE/ION Position, Location and Navigation Symposium, PLANS 2014 - Monterey, CA, United States
Duration: 2014 May 52014 May 8

Publication series

NameRecord - IEEE PLANS, Position Location and Navigation Symposium


Other2014 IEEE/ION Position, Location and Navigation Symposium, PLANS 2014
Country/TerritoryUnited States
CityMonterey, CA

All Science Journal Classification (ASJC) codes

  • Software
  • Computer Science Applications
  • Electrical and Electronic Engineering


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