Development and test of GPS interference monitoring system

GPS is widely used in the location based service and the telematics service. And communication systems, electrical power grids, and financial networks also rely on GPS for synchronization and operational efficiency. GPS applications are newly being developed and becomes very critical infrastructure. However, GPS couldn't be used by intentional interference signal of even low power, low cost transmitters. In order to prevent the damage caused by illegal interference signal to GPS, GPS interference monitoring system(IMS) should be developed and operated. So, this paper presents the development and the test results of the GPS IMS which provides the detection, the direction finding and the location of GPS interference signal. The main functions are verified by test results of the interference test-bed environment.