MTD雷达的舰速补偿

Velocity compensation of MTD radar

舰速补偿问题是舰载雷达必须考虑的问题,MTD雷达的核心是一组多普勒滤波器,针对采用FFT算法实现的滤波器组,可利用傅立叶变换的移位性质将信号频谱移动实现舰速补偿。但为避免载体运动造成的动目标和固定目标的回波频谱太近的影响,提出采用改变相参信号的办法实现补偿,应用实例分析舰速测量误差对系统改善因子的影响。

The problem of velocity compensation is considerable in shipborne radar. The core of MTD radar is a Doppler filter group. To achieve velocity compensation aiming at the Doppler filter groupe realized by FFT arithmetic, it can use the shift character of Fourier Transform which can move the signal spectrum. But to avoid the effect of the close distance between moving and quiescent target spectrum which caused by the moving carrier, this paper put forward a compensated method which change the Coherence signal. At last the paper analyzed the effect of the error of velocity measure on system improvement factor.