Integration gain limitations in passive coherent location radars for manoeuvring target detection

摘要

The lack of transmission antenna gain in passive coherent location (PCL) systems can be circumvented somewhat by the fact that most broadcast waveforms are continuous waveforms and that the lengthening of the integration time can help to increase signal energy. However, with the increase of integration time, a PCL system encounters some limitations in detecting manoeuvring targets. To investigate this, the uniformly most powerful invariant (UMPI) detector presented by Zaimbashi et al. is considered. The detection performance of the UMPI detector in a closed-form expression for a manoeuvring target is obtained. The theoretical findings accompanied by simulation results demonstrate that a manoeuvring target can seriously degrade the detection performance of the UMPI detector when using long integration times.