GAT滤波器在双音多频信号中的实现  

Realization of GAT filter in dual tone multi-frequency signal

作　　者：彭卫韶[1] 李义府[1] 金智[2] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083 [2]长沙医学院计算机系,湖南长沙410219

出　　处：《长沙医学院学报》2005年第1期38-40,共3页Journal of Changsha Medical University

摘　　要：双音多频(Dual Tone Multi—Frequency)信号是音频电话中的拨号信号,在全世界范围内得到广泛应用。本文通过 GAT(Goertzel Algorithm Theory)的设计和成功实现,能很好地解决音频译码器芯片缺少消除噪音功能且未留扩展端口的不足,利用11公布的 Code Composer Studio 插件可以通过配置 DSK 使检测器电路更加简单,采用 GAT 算法比 FFT 更加简洁迅速,使双音频多频信号检测变得准确、迅速和简单。Dual tone multi-frequency(DTMF) signals used in the dial system of telephone are widely adopted all over the world to solve the problems of coding chip in lacking of noise-filter and extended socket through the designing and realization of GAT.The DSK test circuits get simpler by the published code composer studio parts.GAT algorithm runs quicker and simpler than FFT,which makes the dual tone multi-frequency test accurate fast and simple.

关 键 词：双音多频 D GAT 浮点数字信号处理器 滤波 

分 类 号：TN713[电子电信—电路与系统] TN912.3