主元分析法去除瞬态系统收发耦合波研究

在瞬态信号的测量系统中，收发天线的耦合信号是接收系统的主要干扰之一，对系统的性能有很大影响，尤其对近场遥感系统如表层穿透雷达(SPR)系统的影响更为明显。故耦合波的去除对系统的信号处理性能起着至关重要的作用。该文依据SPR系统对信号处理的特定要求及其工作条件，提出了采用主元分析法去除直达波的方法。通过理论分析和具体试验证明该方法可有效去除回波信号中耦合信号；此外，该处理算法简单高效，易于实现实时处理。

Principal Component Analysis Method to Suppress TX/RX Coupled Interference

In a transient signal system, the TX/RX coupled interference is one of principle interferences and has great influence to the system capability, especially to the near field remote sensing system such as Surface Penetrating Radar (SPR). Suppression of the coupled interference is very important for the system performance. With consideration of the system operating condition, the signal and system character, realization object of the signal processing ,the Principal Component Analysis (PCA) method is employed. The validity of the method for the engineering application is demonstrated with theoretical analysis and experiments in this paper, and it can be applied to real-time processing.