FMICW雷达海洋回波信号频率间断点和频率混叠的处理

Sea Echo Signal Processing of Interrupted and Overlapping Frequency Points for FMICW Radar

根据 Donald E.Barrick提出的线性调频中断连续波 (FMICW)雷达信号处理方法 ,探测海洋表面回波距离、Doppler频移和角度信息 .研究了当使用 FMICW雷达实现天线的收发共用时 ,雷达接收和发送矩形脉冲串两项因素引起的频率混叠 ,以及周期线性调频连续波 (FMCW)存在频率间断点对 Doppler谱的影响 .提出了采用FMICW雷达天线收发共用时 ,处理频率间断点和频率混叠的方法 .利用浙江舟山实验数据进行处理 。

Donald E.Barrick's method of FMICM radar signal processing for range/Doppler/angle of ocean echo determi nation is introduced first.When we used the FMICW radar to realize the receiver and trasmitter using one and the same antenna, we had only thinked over a receiver or trasmitter pulse series factor causing influence of frequency overlap ping .Because signals of ocean echo are modulated by the receiver and trasmitter pulse series, we must prevent them from causing frequency overlapping.Because producted FMCW is a period signal,it exists some interrupted frequency points, how to process the points will affect the quality of Doppler. In this paper,we describ the methods of processing interrupted frequency points and frequency overlapping, when the receiver and trasmitter use one and the some antenna for the FMICW radar, and analyse the test datas in ZhouShan ZheJiang China, prove that the methods are correct.