路径损耗，阴影，衰落（瑞利，莱斯和中头m）；信号的调制，解调和比特错误率（BER）与SNR曲线-The path loss, shadowing, fading (Rayleigh, Rice and Nakagami-m) signal modulation, demodulation and bit error rate (BER) and the SNR curve

掌握脉冲编码调制原理； 理解量化级数、量化方法与量化信噪比的关系 -Grasp the pulse code modulation principle Understanding of quantization levels, and quantitative methods to quantify the relationship between SNR