基于DSP的FMCW雷达泄漏对消系统分析  

DSP based Leakage Cancellation Scheme for FMCW Radar

作　　者：张鹏[1] 熊杰[1] 

机构地区：[1]电子科技大学,成都611731

出　　处：《火控雷达技术》2015年第1期43-48,共6页Fire Control Radar Technology

摘　　要：对于单天线FMCW雷达系统,由于它利用一个天线去发射和接收信号,大功率的发射信号会泄露的接收支路,首先,强泄露信号会使接收机前端的低噪声放大器饱和,其次,发射机噪声泄露的接收机将引起接收机灵敏度下降,最后,强的泄露会造成接收机产生虚假目标。针对这一问题本文提出了一种基于DSP的自适应射频对消系统,并分析了系统中可能存在的问题,最后进行了系统中数字部分的算法仿真证明了理论分析的正确性。Frequency modulation continuous wave （FMCW） radar system with a single antenna transmit and re- ceives signals with the same antenna; therefore high power transmitted signal would leak to receiving channel. Firstly, strong leakage signal will saturated low noise amplifier （LNA） in front - end of receiver. Secondly, sensi- tivity of the receiver will decrease due to noise of transmitter leaked to the receiver. Finally, strong leakage signal will make the receiver generate false target. To solve this problem, an adaptive RF cancellation system based on digital signal processing is proposed; problems may exist in this system are analyzed. Algorithm simulation to digital part proves the validity of the theoretical analysis.

关 键 词：FMCW雷达 自适应算法 同频干扰 自适应对消 

分 类 号：TN95[电子电信—信号与信息处理]