a1xiangganjilei

这是用matlab编的代码，实现的功能是可以方便的给定一段信号，画出它的频域的频谱图，对写论文有帮助(This is compiled with the matlab code, function is convenient for a given period of the signal, draw its frequency spectrum chart, to help write the paper)

Implementation algorithm to change contrast of an image

this is a vehicle detection algo, all the files are well explained in the rar file

介绍了线性规划方法，并有实力分析，附有matlab程序代码(Linear programming, and strength analysis with matlab program code)

文章分析了几种室内常见的光噪声以及他们对无线光链接带来的影响。(Indoor ambient light noise and its effect on wireless optical links.)

block diagram of wcdma system communication

Levenberg–Marquardt algorithm

一些特性在OPNET中不能准确描述，若OPNET与matlab联调，则能利用二者的优点使仿真更精确(the code combined OPNET with Matlab)

说明：  ENERGY DETECTION SPECTRUM SENSING

详细的卷积编码与维特比译码算法。产生随机信号，对信号进行卷积编码，然后经过数值转换、格雷编码，QPSK调制，进入加噪信道，之后进行QPSK解调，格雷解码， 数制转换、 维特比译码得到接收端的信号。(Detailed convolutional coding and Viterbi decoding algorithm. Random signal, the signal convolution coding, and then through numeric conversion, Gray coding, QPSK modulation, plus noise into the channel, followed by QPSK demodulation, decoding Gray, number system conversion, Viterbi decoding to get the receiving end of the signal.)