2010101261572177

用MATLAB软件实现带通，低通，高通滤波器的窗函数的频率响应，观察频响特点(MATLAB software band-pass, low pass, high pass filter window function frequency response, the observed frequency response characteristics)

EMD的Toolbox及使用方法 经验模态分解（Empirical Mode Decomposition, 简称EMD）是由美国NASA的黄锷博士提出的一种信号分析方法.它依据数据自身的时间尺度特征来进行信号分解, 无须预先设定任何基函数。这一点与建立在先验性的谐波基函数和小波基函数上的傅里叶分解与小波分解方法具有本质性的差别。正是由于这样的特点, EMD 方法在理论上可以应用于任何类型的信号的分解, 因而在处理非平稳及非线性数据上, 具有非常明显的优势。所以, EMD方法一经提出就在不同的工程领域得到了迅速有效的应用, 例如用在海洋、大气、天体观测资料与地震记录分析、机械故障诊断、密频动力系统的阻尼识别以及大型土木工程结构的模态参数识别方面。本工具书主要分以下几个部分：导论、非稳态信号介绍、一维时频信号分解、二维时频信号分解、时频影像信息提取等。 (Time frequency toolbox for use with MATLAB The Time-Frequency Toolbox has been mainly developed under the auspices of the French CNRS (Centre National de la Recherche Scientifique). It results from a research effort conducted within its Groupements de Recherche ”Traitement du Signal et Images” (O. Macchi) and ”Information, Signal et Images” (J.-M. Chassery). Parts of the Toolbox have also been developed at Rice University, when one of the authors (PG) was visiting the Department of Electrical and Computer Engineering, supported by NSF. Supporting institutions are gratefully acknowledged, as well as M. Guglielmi, M. Najim, R. Settineri, R.G. Baraniuk, M. Chausse, D. Roche, E. Chassande-Mottin, O. Michel and P. Abry for their help at different phases of the development.)

此代码实现的是适用matlab实现输入文件的模版匹配，(Realize this code is applicable to realize the input file matlab template matching,)

该文件给出了单载波频域均衡中MMSE均衡方法的MATLAB实现，其中包含调制解调，交织，解交织以及编译码，包含了整个通信系统的各部分，希望对大家有帮助。(The document gives the MATLAB single-carrier frequency domain equalization MMSE equalization method, which contains modulation and demodulation, interleaving, de-interleaving and encoding and decoding, including the various parts of the whole communication system, we want to help.)

m现代通信系统－使用matlab,该书的所有程序(m modern communication systems- using matlab, the book all the procedures)

HMM (Hidden Markov Model ) Matlab m-Files

基于MATLAB,各种信道的估计方法，共13种(Estimation_of_Kinds_of_Channels(MATLAB))

matlab一百例，有详细的程序讲解，很有用的资料(matlab one hundred cases, explain the procedures detailed, useful information)

这部分代码主要实现了TURBO码的编解码，运用max-log-map译码方法进行译码(this code realise the encode and decode function of turbo,the decoding algorithm is by max-log-map)

mqam demodultion code with fc,fs,fd,M and ini_phase parameter