对MPAM调制方式的仿真，做出ser和ber曲线，与理论值比较。-simulation about MPAM modulation and demodulation. Draw ser and ber curve, compared to theoretical ones.

进行CDMA复用的子函数，可以根据用户信号的路数自动调节扩频比，包含对应的解复用程序，经验证可用。-Functions for CDMA multiplexing, the user can be automatically adjusted according to the ones of the spreading ratio of the signal, including the corresponding demultiplexing process, proven available

Alamouti Code to achieve diversity without channel knowledg at the transmitter It is assumed that system contains 2 transmit antennas and one receive antenna. At the transmitter the data of a two consecutive slots will be considered. At the odd time