Two-stage spectrum sensing in passive radar

Abstract

In this paper, we address the problem of spectrum sensing of received signal in the passive surveillant systems. The received signal is assumed to be completely unknown. We use the two-stage spectrum sensing method to facilitate the detection operation in the passive radars. Moreover, the proposed spectrum analyzer in the passive radar is compared with the one-stage spectrum sensing. Analytical and numerical results show that this method reduces the computational complexity and estimates the frequency characteristics accurately.