中文说明：
多输入多输出正交分频多工模拟器。正交分频多工:OFDM模拟器(外层函数) create_channel:产生一个瑞利衰落信道复用,解的天线配置、正交分频多工结构、power-delay档案。svd_decompose_channel:既然全网络知识是假设,在并行传输奇异值模式。这个函数分解这些频道模式。BitLoad:适用bit-loading算法来实现预期的钻头和能量
English Description：
MIMO OFDM simulator. OFDM simulator (outer layer function) create_ Channel: generate a Rayleigh fading channel multiplexing solution, antenna configuration, orthogonal frequency division multiplexing structure, power delay file. svd_ decompose_ Channel: since the whole network knowledge is assumed, in parallel transmission of singular value mode. This function decomposes the channel patterns. Bitload: apply bit loading algorithm to achieve the expected bit and energy