de_Precoding

This is qpsk ber curve simulation.

照书上写的一个小程序，已经测试过没有问题(According to the book written by a small program, no problem has been tested)

说明：  这是一个有关频谱分析的程序，可实时的画出任意信号的频谱，通过测试程序无误，欢迎下载(This is a spectrum analysis procedure can draw an arbitrary signal in real-time spectrum, through the test procedure correctly, please download the)

SSIM 1.0 Local Search Similarity

MATLAB高等变换数学变换及建模分析的良好入门教材，可供各校研究生只用(MATLAB higher transformation mathematical transformation and modeling analysis of the good introductory teaching material, the schools only for graduate students )

实现快速傅里叶变换，自编函数FFT.而不需使用matlab自带的FFT函数(it can realize the fast fuleir tansform)

BP算法的实现，压缩感知l1算法，谢谢了(BP algorithm, the compressed sensing algorithm l1, thank you)

This is dialog program. for use playing the music through the serial interface. So, this program is included RS-232.

说明：  精度测试时延，基于原始套接字，高精度的测量，大学实验用很好(Socket)

实现背包的最有装载，可以实现背包的最有价值(The realization of the most loaded backpack, the backpack can be the most valuable)