基于部分匹配的雷达回波信号检测

Radar echo signals detection using partial match pattern

针对雷达回波信号检测中对整个回波信号全部匹配滤波需要较长时间及较多资源的问题,提出部分匹配滤波方法.将雷达接收机接收到的回波数据,以雷达发射的线性调频(LFM)脉冲信号的脉宽为长度,分成若干段,逐段匹配滤波,通过判决门限找到匹配结果中的信号峰值后,计算出目标反射回波的位置.运用Matlab对时宽带宽积为500的线性调频脉冲信号进行仿真,结果表明:该方法适用于信噪比高于-12 dB的信号的搜索定位;该方法既可减少处理时间,又能节省系统资源.

Part matching filter was proposed to reduce the processing time and resources used in detecting radar echo detecting with full matching filters, in which echo signals received by radar receiver were divided into some sections according to the length of the linear frequency modulation（LFM） pulse transmitted by radar transmitter, and each section was filtered. Target echo signal was detected via computing after the peak value was found applying the judge threshold value to part matching filter result. Simulation based on Matlab for LFM which its time-bandwidth product is 500 shows that the method is available for radar signal which its SNR （signal to noise ratio） is greater than -12 dB. The method can save processing time as well as the system resource.