大二写的课设程序，模拟数字通信系统仿真，包含AM,DSB,SSB,2ASK,2PSK,2FSK,以及信道编码，信源编码，误码率分析(Sophomore's Course Program, Analog Digital Communication System Simulation, Including AM, DSB, SSB, 2ASK, 2PSK, 2FSK, Channel Coding, Source Coding, Error Rate Analysis)