Completely Integrated Jamming Test System (CIJTS)

GPS guided weapons systems are susceptible to intentional RF interference and Jamming. Techniques exist to mitigate this interference, but they must be tested in the presence of an actual jamming threat to gain the highest assurance that they will work. Live jamming tests in the field require extensive approval and logistics to make sure that they do not interfere with other civil and military users. The approach described in this proposal is to utilize real L-band jamming signals that are not at the safety-of-life GPS frequencies. The approach involves splitting the signals from each element of CRPA antenna array with an antenna interface unit, and coherently mixing the jamming signal with the live GPS data. The CRPAs used by military aircraft for Jammer mitigation through null steering are sensitive at frequencies other than those used by the GPS, in addition to being tuned for reception at GPS frequencies. Since the proposed jammer is not at the nominal GPS frequencies, it should cause no concern that other GPS signals will be jammed unintentionally. However, the live L-band jamming used with this system will allow testing of antenna electronics using anti-jam techniques such as nulling.