JunHengHua

This matlab code describes soft demapper (soft bit) for different modulation types: BPSK, QPSK, PSK 8, QAM 16, QAM 64, which are considered for turbo encoding/decoding. And simulation results are also presented.

包括最小二乘法、SVM、神经网络、1_k近邻法,小波包分析提取振动信号中的特征频率，利用最小二乘算法实现对三维平面的拟合。( Including the least squares method, the SVM, neural networks, 1 _k neighbor method, Wavelet packet analysis to extract vibration signal characteristic frequency, Least-squares algorithm to fit a three-dimensional plane.)

qpsk信号瑞利信道的仿真程序还有搞死的有ber(qpsk signal Rayleigh channel simulation program has also Gaosi ber)

说明：  《matlab语言常用算法程序集》源代码 第五章(&quot Matlab common algorithms assembly language&quot source code Chapter)

there are very useful codes in this file

结合海底环境，采用32元线列阵实现匹配场的定位仿真(Combination of undersea environment, to achieve a 32-element linear array positioning simulation matched field)

此压缩包包含两个程序，一个为录音程序，另一个为放音程序，皆用MATLAB编写，可以改变采集信号的频率和指定播放频率。是在学习数字信号处理中用到的一个小练习。欢迎尝试运行，和进一步修改。(This compressed package contains two programs, one for recording the program, and the other for playback program, are using MATLAB, you can change the frequency of collection and the specified playback signal frequency. Digital signal processing is used to learn a little practice. Welcome to try to run, and further modified.)

三种动态信道分配算法的比较，一种为随机分配算法，另外两种用于认知无线电领域，一种为从资源角度出发的RP算法，一种是从需求角度出发的DP算法。(Three dynamic channel allocation algorithm for comparison, a random allocation algorithm, the other two areas for cognitive radio, a perspective from the resources of the RP algorithm, one is from the demand point of view of the DP algorithm.)

平均互信息函数法：平均互信息函数法的基本思想是：选取互信息函数第一次达到局部极小值时的时间作为最佳延迟时间。(AMI Average mutual information function)

一个载波恢复与符号定时的仿真。 载波恢复使用平方环，符号定时基于早迟门，发送信号采用BPSK调制方式，统计计算的误码率。(A carrier recovery and symbol timing simulation. Carrier recovery loop using the square, the symbol timing based on early-late gate, sending a signal using BPSK modulation, bit error rate statistics calculations.)