摘要
LFMCW雷达检测运动目标,可以采用对称三角LFMCW信号,通过频域配对实现动目标距离、速度的去耦合。但是在实现时,如果只采用传统的FFT作为核心算法就会引起较大的测距、测速误差。本文采用FFT-CZT两级处理方法,从而在运算量增加不多的情况下,显著提高LFMCW雷达的动目标测距、测速精度。仿真结果表明,本方法适用于各种带宽的LFMCW雷达,具有通用性。
Triangular frequency modulation continuous wave, combined with frequency domain matching, is adopted to solve the problem of range-velocity decoupling in LFMCW radars. But the algorithm based on traditional FFT can cause range precision and velocity precision decreased, because of the inherent frequency space of FFT. FFT-CZT two-stage processing is adopted to improve the range precision and velocity precision of LFMCW radar moving target. The method is proved in different band-width LFMCW radar and can be applied widely.
出处
《电子信息对抗技术》
2007年第1期33-35,40,共4页
Electronic Information Warfare Technology
关键词
LFMCW雷达
CHIRP
Z变换
运动目标检测
LFMCW radar
Chirp Z transform
range and velocity measurement of moving target
