步进频连续波采样频率跟随技术

本文介绍了一种步进频连续波雷达检测目标的原理,提出利用采样频率跟随法完成这种步进频连续波雷达的信号处理。即使用该方法可解决针对目标运动引起的步进频速度—频率耦合和速度—距离扰动等问题,在不同的步进频率下,通过采样频率跟随会使同一目标有相同的数字多普勒频率信号;再对步进频率的每个多普勒频点相位进行补偿,可以得到相对精确的距离—速度二维像。因此,采样频率跟随法是一种动目标距离—速度二维检测处理方法。

SFCW Sampling Frequency Follows Method

The theory of detecting target for stepped-frequency continuous wave radar is introduced in this paper and the signal processing of stepped-frequency continuous wave which uses the sampling frequency follows method is presented. Aiming at the problem of velocity-frequency coupling and velocity-range disorder caused by target moving, the same target has same digital Doppler frequency signal through using this method. Then, though compensating every phase of Doppler frequency of stepped-frequency signal, we can obtain a precision range-velocity image. Therefore, the sampling frequency follows method is a 2D range-velocity detecting method of moving target.