调频中断连续波雷达(FMICW)既能解决传统连续波雷达发射信号泄漏问题,又具有分辨率高和被截获概率低的优势,但其在对动目标的检测上存在难度。针对这一问题,文中对FMICW 回波特性展开研究。建立中频回波信号模型,对差拍信号进行分析与推导,再利用二维快速傅里叶变换(FFT)技术提取动目标的速度与距离信息。最后通过MATLAB 进行仿真,同时对二维FFT 算法的复杂度作了分析。结果表明所提方法的有效性。

Frequency modulated continuous wave (FMICW), which can solve the problem of transmitting signal leakage of FMCW, has the advantages of high resolution and low intercept rate. But it is difficult to detect moving target. In order to solve this problem, the echo characteristics of interrupted continuous wave radar are studied in this paper. Firstly, the model of echo signal is established, the beat signal is analyzed and deduced, and then the velocity and distance information of moving target is extracted by two-dimensional FFT technology. Simulation is made by MATLAB, at the same time, the two-dimensional FFT algorithm complexity is analyzed. The results show that the method is effective.

TN958.3