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介绍DTMF信号的产生及检测原理,使用Matlab模拟双音多频信号(DTMF)作为一种用户信令被用于电话系统中的电话机与交换机之间的信号传输过程。在Matlab下的仿真实现有助于其具体系统的优化设计及低噪音环境下的信号检测。
The principle of DTMF signal generation and detection is introduced. DTMF is used as a kind of user signaling to simulate the signal transmission process between telephone and switch in telephone system. The simulation in Matlab helps to optimize the specific system design and signal detection in low noise environment.