LetterClustring

这个是我个人编写的短时傅里叶变换的函数matlab.适用于语音压缩与语音分析.在其中可以加入一些自己的代码，即可改成phase vocoder(this is the STFT function which is wrote by myself(matlab). It is suit for speech compression and analyse. if you add some code in it, it can turn to a phase vocoder straightforward. )

源码程序,用MATLAB.m文件实现QPSK信号的调制与解调(Source program to achieve MATLAB.m document QPSK signal modulation and demodulation)

The Gaussian blur is a type of image-blurring filter that uses a Gaussian function (which also expresses the normal distribution in statistics) for calculating the transformation to apply to each pixel in the image

matlab关于多天线相关矩阵的子程序，调用输入为天线间距，到达角度，和角度扩展(matlab on multi-antenna correlation matrix of the subroutine, call input antenna spacing, arrival angle, and angle expansion)

OFDM的调制过程，已经运行过，比较不错，过程很清晰(OFDM modulation process has been run before, quite good, the process is very clear)

采用自适应信号处理技术的低成本回波抵消器(Adaptive signal processing techniques echo canceler cost)

very uesful program about ofdm

说明：  该例程实现了男女声音识别的算法，识别准确率较高(This routine realizes the algorithm of male and female voice recognition, and the recognition accuracy is high.)

说明：  隐马尔科夫模型是关于时序的概率模型，描述由一个隐藏的马尔科夫链随机生成不可观测的状态随机序列，再由各个状态生成一个观测而产生观测序列的过程。隐藏的马尔科夫链随机生成的状态的序列，称为状态序列；每个状态生成一个观测，而由此产生的观测的随机序列，称为观测序列。马尔科夫链由初始概率分布、状态转移概率分布以及观测概率分布确定(The hidden Markov model is a probabilistic model for time series. It describes the process of randomly generating unobservable state random sequences from a hidden Markov chain, and then generating an observation by each state to produce an observation sequence. A sequence of randomly generated states of hidden Markov chains, called a sequence of states; each state produces an observation, and the resulting random sequence of observations is called an observation sequence. Markov chain is determined by initial probability distribution, state transition probability distribution and observation probability distribution)

this code is a faster kmeans clustering implementation