一种基于双通道微弱正弦信号幅值检测的新方法

针对传统的基于自相关法的弱正弦信号幅值测量中存在准确度不高的问题,本文提出了一种新的基于双通道的正弦信号幅值检测新方法。根据正弦信号和噪声的统计性质,采用双通道对原始信号进行同步采样,提取原始正弦信号的幅值信息,分析了各个因素对算法的影响,实验结果表明本文的算法较传统的自相关法准确度有大幅提高,具有一定的工程实用价值。

A New Amplitude Measurement Method for Signual Signal Based on Double Channel

The accuracy of traditional method for amplitude detection based on auto-correlation is not high, and a new method for amplitude of weak sinusoidal signal in powerful noise based on dual-chan- nel is introduced in this paper. According to the statistical properties of sinusoidal signal and noise Using synchronous sampling to get the amplitude information of original signal, and each factor which affects the result of the Algorithm is analyzed. The simulations proves its feasibility and effectiveness to detect the weak sinusoidal signal and having much higher resolution than auto-correlation method. So it has some practical value.