提高多普勒声雷达的测量精度,从信号中提取更多信息可使其潜力得以发挥。提取频谱二阶矩可获得有关湍流的信息,对于研究混合层的发展、重力波的演变等是有意义的。但横向风对后向散射声信号的谱宽有较大影响。噪声是另一个麻烦。本文给出一种改善的参数估计法和试验结果,效果较好。 Increasing the accuracy of Doppler radar measurements and extracting more information from the signal allows its potential to be realized. Extracting the second moment of the spectrum to obtain information about turbulence is significant for studying the development of mixed layers and the evolution of gravity waves. However, the transverse wind has a greater impact on the spectral width of the backscattered acoustic signal. Noise is another hassle. This paper presents an improved parameter estimation method and experimental results, the effect is better.