压缩感知在多载波EBPSK雷达中的应用

Compressive sensing for multi-carrier EBPSK radar

将压缩感知(CS)技术应用于多载波相位编码脉冲雷达中,分析了该雷达的目标时延和多普勒频率估计以及不同频点散射系数估计的性能.对比了在不同目标数条件下采用BCoSaMP重构算法时EBPSK与BPSK的目标时延和多普勒频率估计性能,并估计了雷达的目标散射系数.仿真结果表明:基于CS的密集多载波雷达的目标检测性能优于正交多载波雷达,而且在正交与密集多载波条件下,EBPSK调制的目标检测性能优于BPSK调制;目标散射系数估计精度与信噪比呈对数关系,在低信噪比时EBPSK调制的目标散射系数估计性能优于BPSK调制.理论分析与仿真结果表明了CS技术在降低信号的采样频率方面的有效性和可行性.

Compressive sensing （CS） technique is used in the multi-carrier phase-coded （MCPC） pulse radar, and the radar performance including the delay and Doppler frequency estimation and tar- get scattering coefficients of different frequencies is analyzed. The extended binary phase shift keying （EBPSK） and binary phase shift keying （BPSK） performance of delay and Doppler frequency esti- mation are compared under the conditions of different numbers of targets using the block compressive sampling matching pursuit （BCoSaMP） reconstruction algorithm. And the target scattering coeffi- cients of this radar are estimated. Simulation results show that the detection performance of the dense multi-carrier radar based on CS is better than that of the orthogonal multi-carrier radar, and under the condition of the orthogonal and the dense multi-carrier, the target detection performance of the EB- PSK modulation outperforms that of the BPSK modulation. Furthermore, the estimation accuracy of the target scattering coefficients has a logarithmic relationship with signal to noise ratio （SNR）, and the EBPSK modulation signal has better target scattering coefficients estimation performance than the BPSK modulation signal at low SNR. Theoretical analysis and simulation results show the effective- ness and feasibility of the CS techniaue in terms of reducin~ the samolin~ freauencv of the signal.