利用平稳性提高法估计脉冲多普勒信号的频谱宽度

脉冲多普勒的频谱宽度可用于诊断血管疾病。为了准确估计这一参数，该文阐述了平稳性提高了方法，并把它和传统的短时快速傅里叶变换法进行比较，分析模拟脉冲多普勒信号的实验表明，平稳性提高法比短时快速傅时右变化法对脉冲多普勒集训珠频谱有更高的估计精度。

Estimating the spectral bandwidth of pulsed Doppler signal with the stationarising method

The spectral bandwidth of pulsed Doppler signal can be used to diagnose vessel diseases. To estimate this index with a maximum accuracy,a stationarising method is described in this paper. It is also compared with the conventional short term Fourier transform. From the experiments of analysis of simulated pulsed Doppler signal,it was found that the resolution of estimation of spectral bandwidth with the stationarising method is higher than that using the short term Fourier transform. Since the Fast Fourier Transform can be also used in the stationarising method,this method is easily implemented in real-time. So the stationarising method is. an effective one to estimate the spectral bandwidth of pulsed Doppler signal.