一种高频周期信号的低频采样方法

在模拟信号转换为数字信号的过程中,对转换结果影响最大的是采样频率的设定,针对采样频率的设定受到Nyqu ist定理的限制,传统的模拟信号数字化系统可以处理的模拟信号频率较低的现状,文中主要从理论上推导和证明了一种突破Nyqu ist定理的限制方法,使用这种方法可以在模拟信号转换为数字信号的系统中,使用较低采样频率对高频率周期信号进行采样。从而能够使数字处理技术得到更加广泛的应用。

Low-frequency Sampling Method for High Frequency Periodical Signal

During the conversion from analog signal to digital signal,the sampling frequency is the key factor for conversion results.The setting of sampling frequency is limited by nyquist theorem,and the digitalized system for traditional analog signal can only process the analog signal with lower frequency.A method which is beyond the limitation of Nyquist theorem is derived and verified in this paper.In some systems where the analog signal is converted into digital signal,the lower sampling frequency can be used for the sampling of high frequency periodical signal through this method,and therefore the digital processing technology can be extensively employed.