GNSS Jammer Location Using Multipath Exploitation

ABSTRACT: Detecting and locating Global Navigation Satellite System (GNSS) jammers is a vital part of navigation warfare (Navwar), comprising the major thrust of Navwar Electronic Support (ES).The objective of this SBIR effort is to develop a ground-based GNSS Jammer Location capability capable of estimating the position of a GNSS jammer within 100 meters, and estimating jammer position within 10 meters when networked with other sensors.Under this effort we shall develop a design for a networked GNSS jammer locator suitable for detecting jammer signals operating on any of the GNSS frequencies which leverages fielded tactical radios in ground vehicles for data collection and networking.We shall investigate methods of creating observations that can distinguish between direct and multipath signal paths between the SDR units and the jammer to allow for precision geolocation of jammers and shall demonstrate through simulation the ability to provide precision jammer location using a combination of collaborative data sharing, within the bandwidth constraints of a tactical network, and onboard processing of the jammer signal. A plan will be developed to build and test a brassboard prototype GNSS jammer locator under Phase II for testing in laboratory and controlled field environments.; BENEFIT: Effective jammer detection and location 1) enables alternative means to mitigate jamming (such as kinetic attack), 2) supports mission planning, and 3) increases situational awareness.The proposed collaborative jammer location (JLOC) solution provides a ground-based mobile capability to effectively detect and locate GNSS jammers at the tactical edge greatly increasing an operational teams ability to deter jamming attacks.The GNSS JLOC network technology is designed to transition into operation as a software application running on fielded tactical radios providing GNSS jammer situational awareness throughout mission execution.