动目标检测(MTD)是现代雷达信号处理领域的一项重要技术,而对MTD的性能起决定性作用的是多普勒滤波器组的设计。相对传统采用快速傅里叶变换(FFT)方法设计的MTD的缺点,希望设计出一组在零频处抑制比达60dB,对动杂波抑制比达50dB的一组滤波器。文中采用特征滤波器法设计得到了一组滤波器系数,并经过简要仿真验证,用该方法得到的滤波器组较传统FFT法设计的滤波器组性能要优越,在某些性能上也优于加窗FFT法。
Moving target detection (MTD) is an important technology in the field of radar signal processing, and the performance of MTD plays a decisive role in the design of Doppler filter banks. Considerting the shortcomings of the traditional Fast Fourier Transform (FFT) design of MTD, we design a set of fiher with a rejection ratio of 60dB at zero frequency and 50dB to dynamic clutter rejection ratio. In this paper, a set of filter coefficients are designed by using the characteristic filter method. A brief simulation shows that the filter banks obtained by this method are superior in performance to those by the conventional FFT method, and are also superior in some aspect to the Windowed FFT method.