摘要
在进行外场RCS测量时,测量距离模糊窗口远大于目标区有效窗口;为此本文提出了一种测量数据减缩方法;该方法用一个相关本振信号对目标区回波信号进行二次移频处理,大幅度降低了信号载波频率,从而有效地缩减了采样频率;压缩了采集数据存储量。
When performing RCS measurements for outdoor targets, usually the whole space range under measurement is greatly longer than the actual target zone, which causes very large data storage and makes further data processing difficulty. To solve this problem, an effective method is presented in this paper, which can largely reduce measurement data. In this method, a related local oscillation signal is generated to be mixed with the received signal, which can greatly decrease the carrier frequency of the return signal from targets. With this method, a much lower sampling rate is guaranteed, which can greatly reduce the data storage and signal processing time.
