本文提出了一种提取噪声中正弦信号的总体最小二乘方法。在采用信号增强技术降低观测噪声后 ,利用总体最小二乘方法估计被测信号参数可以得到比传统方法更好的分析结果。仿真实验表明 ,本文方法具有较好的噪声稳定性和较高的频域分辨能力 ,能准确地检测出频率非常接近的正弦信号 ,具有较好的估计性能 In this paper, we propose an overall least square method for extracting sinusoidal signals in noise. After using the signal enhancement technology to reduce the observed noise, the total least square method can be used to estimate the measured signal parameters to obtain better analysis results than the traditional methods. The simulation results show that the proposed method has better noise stability and higher resolution in frequency domain, and can accurately detect sinusoidal signals with very close frequency and has better estimation performance