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帮助大家学习matlab和mathmatica(help you learn matlab)

functions usable for waterproof picture ! matlab code

说明：  快速傅里叶变换的应用，可以看一看。。。。。。。。。。。。(fft transform)

该程序主要用于实现施密特正交化过程，能够较好的完成程序运行(The program is mainly used to achieve Schmidt process, better able to complete the run)

输入信号为方波信号+高斯白噪声，方波信号基 频为1kHz，幅值为1，高斯白噪声方差为0.2， 均值为0，采样频率为20kHz。试用最大熵估计 法估计此信号的AR模型及其功率谱，并分析结 果(The input signal is a square wave signal+ Gaussian white noise, square wave signal fundamental frequency 1kHz, amplitude is a Gaussian white noise variance is 0.2, the mean is 0, the sampling frequency is 20kHz. Try maximum entropy estimation method to estimate the AR model of this signal and its power spectrum, and analyze the results)

说明：  用MATLAB产生简单三角信号及高斯信号(Generating simple triangle signal and Gaussian signal by MATLAB)

S变换的matlab源码，并应用几个信号作为例子来说明怎么使用s变换以及s变换可以用来做些什么事情。s变换是时频分析领域中一个较新的内容，现在在信号处理，地震勘探，语音识别等领域都开始了对它的应用研究，是目前的一个热点。(S transform matlab source, and apply some signal as an example to illustrate how to use s and s transform transform can be used to do things. s transform time-frequency analysis are a relatively new area of content, now in the signal processing, seismic exploration, speech recognition and other areas of the beginning of its applied research, is a hotspot.)

能实现人脸的简单匹配算法，本人亲自测试，还行吧(To achieve a simple matching algorithm, face, OK.)

这是<matlab程序设计教程>的书籍源代码。(this is the book code of matlab program design course)

QPSK调制代码,高斯和瑞丽衰落信道后的信号波形(QPSK　Modulation)