谱估计差异是医学诊断应用中谱分析仪的实际敏感性的一个确定因素。本文提出了一种简单的方法用于改进多谱勒信号的瞬时谱估计的定义。文章首先介绍了FFT谱估计的随机特性,在此基础上,提出了“估计噪声”的概念用于解释估计的随机不确定性,根据此概念提出了谱估计的自适应滤波方法使“估计噪声”所产生的效 Spectral estimation differences are a determining factor in the actual sensitivity of a spectrometer in medical diagnostic applications. In this paper, we propose a simple method to improve the definition of instantaneous spectral estimation of Doppler signals. Based on this, the concept of “estimating noise” is proposed to explain the stochastic uncertainty of estimation. According to this concept, an adaptive filtering method of spectral estimation is proposed to make the estimation of noise Produced by the effect