中文说明：
MATLAB环境下的Simulink仿真平台，构建PCM编码与解码电路图，对模拟信号进行采样、量化、编码, 将编码后的信号输入信道再进行PCM解码，还原出原信号.建立仿真模型,分析仿真波形。
English Description：
In the Simulink simulation platform of MATLAB, the PCM coding and decoding circuit diagram is constructed. The analog signal is sampled, quantized and coded. The coded signal is input into the channel and then PCM decoding is carried out to restore the original signal. The simulation model is established and the simulation waveform is analyzed< br/>