实现了pcm调制的全过程的MATLAB仿真，包括调制、A率压缩、量化、解扩、解调、信号恢复。-Modulation achieved pcm MATLAB simulation of the whole process, including the modulation, A rate of compression, quantization, despreading, demodulation and signal recovery.

实现了对模拟信号的量化编码并计算了模拟信号的量化噪声-The realization of the analog signal and the quantization coding to calculate the quantization noise analog signal