Ambiguity function analysis for passive radar system performance

Passive coherent location (PCL) systems can employ a variety of terrestrial broadcast signals for target detection and ranging. Through analysis of the ambiguity function, one can determine a signal's suitability for this application. The main parameters of concern are amplitude, range resolution, Doppler resolution and sidelobe ratios. This paper presents an analysis of several recorded signals in terms of their suitability for PCL. We also discuss the effects of compromise when choosing between performance in range or Doppler resolution, signal processing gain, and surveillance volume.