给出了几种OFDM仿真的源程序，包括传输误码率与信噪比的关系图等。-given several OFDM simulation of the source, including transmission error rate and SNR map of the relationship.

高阶QAM归一化映射表，并经过量化。直接运行-High-order QAM normalization map, and after quantization. Run directly

The MAP algorithm also known as BCJR algorithm is an algorithm for maximum a posteriori decoding of error correcting codes defined on trellises (principally convolutional codes). The algorithm is named after its inventors: Bahl, Cocke, Jelinek and Ra