FSK与DTMF来电显示通信终端的设计

THE DESIGN OF FSK AND DTMF CALLER IDENTIFICATION COMMUNICATION TERMINAL

在通信中,常用的调制信号有两种:FSK和DTMF,其中FSK是属于数字领域的通信方式,而DTMF则是属于模拟领域的通信方式。本文将两者统一起来,对来电信号进行解调,进而提取来电号码。所提出的设计方法可以应用于个人身份识别、进口电话机的格式转换、企业黄页信息检索等领域,从而来满足人们对信息的需求。

There are two common modulation signals in telecommunications： FSK and DTMF. FSK is a digital communication way, while DTMF is a simulative communication way. My research is to try to combine the two together and adjust the calling signals in order to identify the calling phone number. In order to satisfy people＇ s demand for information, this research subject could be used in the following fields： to know the caller＇ s identity, to transmit the format of import phones and to search for the enterprise yellow paper in- formation.