BP神经网络用于函数拟合与模式识别，多元数据分析的主分量分析投影，与理论分析结果相比，这个有中文注释，看得明白，本程序的性能已经超过其他算法，给出接收信号眼图及系统仿真误码率。- BP neural network function fitting and pattern recognition, Principal component analysis of multivariate data analysis projection, Compared with the results of theoretical analysis, The Chinese have a comment, understand it, This program has exceeded the performance of other algorithms, The received signal is given eye and BER simulation systems.