基于正负线性调频信号的压缩感知波形分离方法  

CS-based Waveform-separation Method Based on Positive and Negative Linear Frequency Modulation Signal

作　　者：陈桥 童宁宁[1] 丁珊珊 胡仁荣 CHEN Qiao;TONG Ningning;DING Shanshan;HU Renrong(Air and Missile Defense College,Air Force Engineering University,Xi’an 710051,China)

机构地区：[1]空军工程大学防空反导学院

出　　处：《弹箭与制导学报》2019年第4期37-40,44,共5页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：国家自然科学基金(6157010318)资助

摘　　要：基于压缩感知的波形分离方法代替了传统的匹配滤波过程,改善了波形分离效果。由发射波形集及其时延构成的感知矩阵列相关性直接影响重构效果,因此选择发射波形是关键。研究了感知矩阵的列相关性取决于发射信号自相关和互相关性能,因此对比分析了相位编码、OFDM-chirp和正负线性调频信号的相关性能,构造出感知矩阵进行仿真。得出正负线性调频信号应用于压缩感知波形分离方法使得成像效果最佳。CS-based waveform-separation method replaces the traditional matched filtering and effectively improves the results.The waveform selection is the key link of this method,because sensing matrix column correlation will influence the effect of restructuring which is related to transmitting waveforms and time delay.Theoretical analysis shows that the column correlation depends on transmitting waveforms’autocorrelation and cross-correlation performance.Therefore the paper compared and analyzed phase coded signal、OFDM-chirp and positive and negative linear frequency modulation signal and constructed relevant sensing matrix to simulate.The result is that the positive and negative linear frequency modulation signal has the best function.

关 键 词：波形选择 压缩感知 波形分离 感知矩阵 

分 类 号：TN958[电子电信—信号与信息处理]