chengxu

国外编写的一个QPSK仿真程序，给出了调制解调及误码分析(Foreign QPSK simulation program written in a given modulation and demodulation and error analysis)

DUET 算法实现程序，针对时延及衰减模型。(DUET algorithm procedure for delay and loss model.)

Voice/Speech recognition

Physical Principles of Sedimentary Basin Analysis源代码和书(Physical Principles of Sedimentary Basin Analysis)

包含有DCT水印嵌入算法，DWT水印嵌入算法，以及水印攻击和性能测试程序。参考价值极大(mark )

绘图,关于图像的圆形绘制，使用MATLAB绘图函数，自定义函数绘制圆形图像(circle)

魏巍的《MATLAB程序设计教程》电子教案，很全的啊(Wei Wei' s " MATLAB Programming Guide" e-lesson plans, it is full of ah)

本论文首先介绍了当前深空通信的编码调制技术的现状与发展，阐述了以往 的深空通信中的编码和调制技术的方案和局限性，提出LDPC码和FQPSK调制的 优越性和发展前景。第二章描绘了LDPC码的奇偶校验矩阵的图形表示、生成方 式和译码方法，并比较二元LDPC码和多元LDPC码的优越性和实现问题。第三 章在介绍FQPSK调制的方案的由来、改进和发展的基础上，对其进行了功率谱分 析，介绍了一些常规的解调方案。(This paper introduces the current situation and development of the technology of deep-space communication code modulation on the coding and modulation techniques in deep space communications program and limitations of the proposed of LDPC codes FQPSK modulation superiority and development prospects. Chapter II depicts a graphical representation of the LDPC code of the parity check matrix generation method and decoding method, and compare the superiority of binary LDPC codes and multiple LDPC code and implementation problems. Chapter origin in the introduction FQPSK modulation program, improvement and development on the basis of its power spectrum analysis, conventional demodulation.)

基于粒子群的神经网络优化算法的应用，在土壤水分特征曲线中的应用。(Neural network based on particle swarm optimization algorithm applied in the soil moisture characteristic curve application.)

说明：  如何在图像中加入一个冲击信号，求冲击信号的自相关 并求与高斯信号的互相关性(how to insert noise,and how to konw the correlation with gaosi noise)