DTMF信号的高精度数字频谱分析技术

High Accuracy Digital Spectrum Analysis Technique of DTMF Signal

本文介绍了一种采用离散傅里叶变换的高精度数字频谱分析方法，用它实现了双音多频（ＤＴＭＦ）信号的预率分离与识别，得到了有价值的结果。

Abstract：This paper presents a high accuracy niethod to analyse digital spectrum usingDiscrete Fourier Transform（DFT ）．It can be used to separate and discern the frequency ofDTMF signal．Worthy results are obtained.