A low-cost monitoring station for detection & localization of interference in GPS L1 band

GNSS sensors have become critical in some applications while the low power levels of the received signals are vulnerable to interference. This paper presents a system made of networked low-cost monitoring stations with the ability to detect and localize interference sources. The method is based on time difference of arrival (TDOA) measurements obtained by cross-correlating raw IF samples collected by unsynchronized front ends. The capabilities have been demonstrated experimentally in a controlled test executed in June 2012 with commercial jammers in both stationary and dynamic scenarios.