Passive location and precision analysis based on multiple CDMA base stations

The use of multiple non-co-operative CDMA base stations as external illuminators for passive radar target detection and location is investigated. A signal-processing scheme is developed to locate moving targets. Clutters resulted from direct-path and multi-path signals are filtered adaptively using a well-designed cost function. The target´s range and speed information are acquired via pulse compression. Finally by fusing couples of location parameters, the target could be located and the multiple base stations could bring about an improvement in location precision. The real data and simulation results verify the feasibility of this passive location system.