摘要
１ＦＭＣＷ雷达在理论上具有很高的测距精度和距离分辨力，然而在实际系统中，由于其采用ＦＦＴ进行信号处理所固有的频域采样间隔，使得其测距精度与距高分辨力处于同一数量级。为此，本文在传统ＦＦＴ处理的基础上，采用Ｃｈｉｒｐ－Ｚ变换进一步对其回波中频距离谱的主瓣进行局部细化，从而在运算量增加不多的情况下，大大提高１ＦＭＣＷ雷达的测距精度，以满足高精度测距的实际需要。
The Linear Frequency Modulation Continuous Wave (LFMCW) radar has high theoretical range precision and range resolution, but the practical range precision is the same order as the range resolution because of the inherent frequency space of FFT in signal processing. In this paper, Chirp-Z transform is adopted to reduce the frequency space of main lobe of echo range spectrum based on the FFT and to increase less operation. This method can consumedly improve the range precision of LFMCW radar and satisfy with the practical needs of high precision radar ranging
出处
《信号处理》
CSCD
2002年第2期110-112,106,共4页
Journal of Signal Processing
