Data ambiguity in passive radar tracking

A multistatic passive radar system exploits third party transmitters like radio or television transmitters for target surveillance. Signals of non-cooperative illuminators are generally not designed for radar purposes resulting in possibly low quality of the bistatic measurement and in ambiguous measurement. For different types of passive radar (exploiting DAB, DVB-T, FM and GSM illumination) we discuss the dimension of the association problem and the impact on the design of the tracking algorithm.