强杂波背景下FMCW雷达低小慢目标探测研究

Research on Low Small Slow Target Detection by FMCW Radar in Strong Clutter Background

强杂波背景下的雷达回波处理一直是雷达信号处理的难点和重要工作。对调频连续波雷达信号处理进行了详细分析,完成了中频采样、数字下变频、FFT处理、MTI/AMTI处理、反异步处理、CFAR和杂波图处理原理框图设计。通过对强杂波背景下FMCW雷达低小慢目标的探测能力分析,提升了强杂波背景下对近距离小木船及海面漂浮的浮筒等低小慢目标的探测能力。为复杂海洋环境下FMCW雷达低小慢目标探测提供了一种新方法。

Radar echo processing in strong clutter background has always been a difficult and important work of radar signal processing.Firstly,the signal processing of FMCW radar is analyzed in detail.Then the principle block diagram design of IF sampling,digital down conversion,FFT processing,MTI/AMTI processing,anti-asynchronous processing,CFAR and clutter map processing is completed.Finally,the detection of low small slow targets by FMCW radar could improve the detection ability of low small slow targets such as short range small wooden ships and floating buoys on the sea under strong clutter background.Thus,a new method is provided for FMCW radar to detect low small slow targets in complex marine environment.