CAJ | 학술논문

针对基于外部照射源的无源雷达中强直达波和多径干扰会严重影响目标的检测和方向估计的问题，提出了一种基于压缩感知的无源雷达信号处理方法。首先将回波天线接收的信号与参考信号作时延-多普勒二维相关，然后利用压缩感知重构算法对各个时延-多普勒单元内的数据在方位向作稀疏重构，以提取目标回波信号。基于FM信号的仿真结果表明，本文提出的方法不仅能够有效消除直达波和多径干扰对检测目标回波的影响，同时由于压缩感知重构算法的高分辨性，还能够获得目标的方位信息。
침대기우외부조사원적무원뢰체중강직체파화다경간우회엄중영향목표적검측화방향고계적문제，제출료일충기우압축감지적무원뢰체신호처리방법。수선장회파천선접수적신호여삼고신호작시연-다보륵이유상관，연후이용압축감지중구산법대각개시연-다보륵단원내적수거재방위향작희소중구，이제취목표회파신호。기우FM신호적방진결과표명，본문제출적방법불부능구유효소제직체파화다경간우대검측목표회파적영향，동시유우압축감지중구산법적고분변성，환능구획득목표적방위신식。
Considering that the strong direct-path wave and multi-path interference would affect badly the target detection and DOA estimation in a passive radar based on the external irradiation source, we propose a method of signal processing for the compassed sensing-based passive radar. First, the time-delay Doppler two-dimensional correlation is made between the signals received by the echo antenna and the reference signals, and next, the data in each time-delay Doppler units are sparsely reconstructed on its azimuth by using the compressed sensing reconstruction algorithm, for extracting the target’s echo signals. Simulation results on account of FM signals show that the proposed method can not only eliminate effectively the influences of direct-path wave and multi-path interference on detection of target echoes, but also obtain the azimuth information of the targets, meanwhile, due to the high resolution of compressed sensing reconstruction algorithm.