chengxu

用matlab作图时，对于下标的标注格式需要用特殊符号来实现。本文档里面归纳了相关的标注格式的符号，供大家学习参考。(Plotted using matlab need to use special symbols for subscripts label format. This document which summarizes the annotation format symbols, for all to learn.)

music含有空间平滑的算法，备注很详细。(music contains a spatial smoothing algorithm, very detailed notes.)

说明：  卫星信道中的调制识别的matlab仿真分析，很不错的(Satellite channels in the modulation recognition of matlab simulation analysis, it is good)

PULSE CODE MODULATION

基于MATLAB的几种数字调制仿真，包括2ASK、4ASK，2PSK，4PSK，QAM等调制方式。结合GUI图形表示出来。内含两个文件，一个是digital_modulation.fig图形文件，另一个是digital_modulation.m源码文件。(digital_modulation)

classifier ID3 to classify data

MATLAB经典示例 以示参考 十分有用(MATLAB classic example to show reference useful)

This function make iteration classification to find the best feature combination

主要用途是对抗多径衰落。由于多径衰落的存在，使得同一个帧由于路径不同，到达用户端的时延有先有后。在相关的频域上的会造成子载波之间的相互干扰，影响 性能。另外，由于有了循环前缀，使得IFFT FFT操作把原来的线性卷积变成循环卷积，大大简化了相应的信号处理复杂度(The main purpose is to fight against multipath fading. Due to the presence of multipath fading, the first after they have the same frame different paths to reach the client delay. Would cause mutual interference between sub-carriers in the frequency domain, affecting performance. In addition, thanks to the cyclic prefix, so IFFT FFT operation to the linear convolution of the original into a circular convolution, greatly simplifying the corresponding signal processing complexity)

该程序的功能是用小波实现图像去噪的目的，主要是自然图像。(the procedure is the function image using wavelet denoising, our main purpose is natural images.)