基于时、频域数字坐标重叠技术的信号处理研究

Study on Digital Signal Processing about the Time-domain and Frequency Domain Technology Coordinate Overlapping Research

过快速傅里叶变换(FFT)对原始信号时域转换频域过程及其相互的特性做了深入的研究,并分析了折叠频率、最大分辨频率、采样频率特性及其关系,在此基础上提出采用比例系数来换算数字坐标的算法,使时、频域数字坐标重叠.在这种数字化重叠坐标中,计算机对滤除或提取某一频率带来很大方便和直观.仿真实验表明该方法对信号处理具体的实现提供了简单实用的方案,给当前信号处理的研究提供了一个新的思路.

This article studies on original signal from Time-Domain to Frequency-Domain conversion process and their characteristics through FFT. Then it analysis the characteristics of the folding frequency, the greatest frequency resolution and the sampling frequency and their relations, It puts forward a algorithm through Conversion factor proportional to the number of coordinates. So, the Time-Domain and Frequency-Domain digital coordinates overlap. Computer let it easy to filter or extract a certain frequency in this process. The simulation shows that the method of signal processing provides a simple and practical realization of specific programs, which provides a new way of thinking to the current signal processing.