利用时变滤波器模拟多普勒信号

计算机模拟的多普勒信号可用于评估各种多普勒信号处理的性能。为了快速而容易实现模拟正交多普勒信号，提出了一种仅利用一个时变波滤器的方法。该方法根据白噪声通过时变滤波器的特性而实现的。实验表明，对以该方法模拟的多普勒信号的短时傅里叶分析结果与理论预测相吻合，故该方法是切实可行的。

Simulating Doppler Signals Using a Time-Varying Filter

A computer method of simulating Doppler signals is needed to assess the performance of various Doppler signal digital processing techniques. To develop a rapid and simply implemented simulation method for nonstationary in-phase and quadrature Doppler signals, a method using only a time-varying impulse response filter is described in this paper. This method is based on the application of white noise to a filter with a time-varying impulse response. Results of analysing simulated Doppler signals using the short time Fourier transform shows the agreement with the theoretical prediction,which means this simulation method is reasonable.