Jamming Noise Suppression Using Discrete Polynomial-Phase Transform in Pulsed Radars

In this paper, a method is provided for suppressing FM noise jammer signal with polynomial-phase in pulsed radar based on the discrete polynomial-phase transform. In the first step, DPT transform is used to estimate polynomial-phase coefficients and amplitude of jammer signal. In the second step, the jammer signal has been reconstructed using the estimated amplitude and phase of the jammer signal, Then, jamming is suppressed efficiently by subtracting the reconstructed jammer signal from the received signal. Mean square error and CRLB for polynomial coefficients and amplitude of jammer signal in presence of combined target signals and the receiver noise, are calculated theoretically for the case of linear frequency modulation, and then are compared with simulations. The detection performance of the proposed method is also shown.