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在通信中实现ＱＡＭ８的星座图恢复，并且附上了结果图作为参考。ＱＡＭ８的星座图是一种简单的调制方式(QAM8 achieve constellation in communication recovery, and attach the results shown as a reference. QAM8 constellation is a simple modulation)

LDPC编码译码的Matlab代码，主要考察吞吐量随信噪比变化的关系。demo文件运行程序，其他文件为自己编的函数。(The LDPC codec Matlab code, mainly on the throughput changes with the signal-to-noise ratio. demo file to run the program, and other documents made themselves function.)

关于端点检测的几种方法，语音样本是自己录制的，对传统算法做了一些改进，加入了去噪，去噪之后再进行端点检测，均调通 vad0303：自己设置调整门限为一定值 vad0310：根据能量值和过零率设置门限，自适应门限值 vad0310_2：基于比例因子的门限自调整 vad0310.m加入了噪声，端点检测前都噪声进行了处理 entropy.m：基于自适应子带频谱熵的稳健性语音端点检测 可用于语音增强及端点检测 dbdoor.m：双门限算法，用于语音端点检测。可以通过调整门限值，并加入门限自适应算法，实现语音端点检测(Several methods on endpoint detection, recording their own voice samples, the traditional algorithm has made some improvements, adding a de-noising, and then after de-noising endpoint detection are transferred through)

使用小波包变换分析信号的MATLAB程序(Simulation of a simple short-circuit voltage sag signal, find the modulus maxima of wavelet coefficients...)

the above uploaded codes are very useful for image segmentation,edge detection

说明：  lu分解,可以应用该函数分解矩阵，lu分解,可以应用该函数分解矩阵，(lu fen jie)

this is for the time varying system response or channel behaviore

PID参数的整定就是合理的选择PID三参数。从系统的稳定性、响应速度，超调量和稳态精度等各方面考虑问题，三参数的作用如下：(PID parameter setting is the reasonable choice of three parameters of PID. From the system stability and response speed, overshoot and steady state accuracy and so on various aspects to consider problem, the role of the three parameters are as follows:)

the code simulates the ofdm over rayielgh fading channels

函数查找最小边的权重匹配给出的M×N的边缘 使用匈牙利算法权重矩阵的权重 A function for finding a minimum edge weight matching given a MxN Edge weight matrix WEIGHTS using the Hungarian Algorithm. ( A function for finding a minimum edge weight matching given a MxN Edge weight matrix WEIGHTS using the Hungarian Algorithm. )