包括各种调制方式的比较，在加性噪声下以及在多径下的仿真，包括各种函数的代码（编码，调制，译码，解调，等一系列完整的函数）-Include a variety of modulation methods of comparison, in the additive noise as well as in multi-path simulation, including the various function codes (coding, modulation, decoding, demodul