ofdm.m为主程序，可以运行，将得到迭加噪声之后的误码率曲线，并与理论QPSK加高斯白噪声误码率曲线比较，两者将重合,ofdm.m-based program, you can run, will be after the noise superposition error rate curve, and with the theoretical QPSK plus white Gaussian noise bit error rate curves, which will coincide

基于ML的信号估计算法。包含多种不同的信号情景-ML estimation algorithm based on a signal. It contains a number of different scenarios signals