digital-signal-processing

说明：  Matlab从入门到精通中所有的源程序。(Matlab from entry to master all of the source.)

QPSK Modulation and Demodulation with AWGN , Performance comparision against on BER / EB/NO ratio.

这是讲述复值信号的pdf文档，对加深信号的学习会有帮助。(This is about the complex-valued signal pdf documents, the study would help to enhance the signal.)

共振解调的过程如下：首先对采集到的信号进行傅里叶变换，然后利用传感器自身的谐振频率进行分析，对滤波后的信号进行包络，包络以后去除了高频部分，得到包络信号，再对改进的包络信号进一步进行低通滤波，最后对最终得到的信号进行傅立叶变换求其频谱图。共振解调的原理及其过程可以用图2 来进行表述。(The process of resonance demodulation is as follows: First, Fourier transform is performed on the collected signal, and then the resonance frequency of the sensor is used for analysis. The filtered signal is enveloped, and the high frequency part is removed after enveloping to obtain an envelope. The signal is further subjected to low-pass filtering on the improved envelope signal. Finally, the spectrum of the resulting signal is Fourier-transformed. The principle of resonant demodulation and its process can be expressed in Figure 2.)

该程序时用于做图像分割源代码，应用水平集方法的，速度很快的一种方法(The program used to do image segmentation source code, application level set method, a method of fast)

一个简化的H.261视频编码方案，最后显示两张图压缩编码后的压缩比(a simple h.261 video coding method, and finally display the compress rate of two pictures.)

MATLAB神经网络功能的使用教程，详细介绍了神经网络技术的功能、原理及编程(The use of MATLAB neural network function tutorial, neural network technology was introduced in detail the function, principle and programming)

matlab的时频分析工具箱，希望在对信号的分析上可以帮助到大家。(the time-frequency analysis matlab toolbox, hope that the analysis of the signal can help to everyone. )

%% 用聚类法确定葡萄酒分级 % 《MATLAB数学建模方法与实践》(《MATLAB在数学建模中的应用》升级版)，北航出版社，卓金武、王鸿钧编著.(Classification of wine by clustering method Mathematical Modeling Methods and Practice in MATLAB (Upgraded Edition of Application of MATLAB in Mathematical Modeling), edited by Zhuo Jinwu and Wang Hongjun, Beihang Publishing House.)

mimo with cm1-4 channels