RANGE SUPER-RESOLUTION AT LOW SNR VIA INTERPULSE FREQUENCY HOPPING AND SIGNAL ENHANCEMENT
利用脉间跳频和信号增强技术实现低信噪比下雷达距离超分辨

For linear and non-linear frequency modulation (LFM/NLFM) signals with large time-bandwidth product (TB), radar super-resolution in range domain at low SNR is investigated. A novel signal enhancement algorithm based on FFT for LFM/NLFM signals used for preprocessing, which significantly raises the effective signal-to-noise ratio (SNR), is presented. By use of decorrelation between echoes of different targets achieved by pulse-to-pulse carrier frequency hopping, a variety of approaches are suggested to further lower the SNR threshold for range super- resolution. Monte-Carlo simulation results are presented to illustrate the improved performance.