Utilization of chirp-z transform to improve the performance of target number detection of low resolution radar

Although it is difficult to resolve formation flight targets for low resolution radar, several signal processing methods are proposed to solve the problem. All these methods need to first obtain the I/Q data of the range gate containing the formation targets. In this paper, chirp-z transform (CZT) is proposed to be used in obtaining peak I/Q data of range gate, which can reduce the amplitude and phase errors and assure the effectiveness of further signal processing. Simulation results show that by applying CZT to obtain target echo data and then perform Doppler analysis or one-dimensional (1D) cross-range imaging, the target number can be effectively determined