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Title : Implementation of quadrature modulation and demodulation Design Object : By implementing quadrature modulation and demodulation of analog signals in digital signal processing, students will have better understanding of sampling and frequency analysis of discrete-time signals. Design Content : Make a MATLAB function which performs quadrature modulation and demodulation for a input signal with anti-aliasing filtering.

本人编写的QC-LDPC码的完整实现，采用阵列校验矩阵，极其简单，适合入门(A easy-to-learn source code of QC-LDPC encoder)

eof分解用的函数，说明如下：function [EOF,PC,F,diff]=EOFcgx(X) EOF分解。Xm*n 空间数据维数m，n为时间采样点 返回值EOF为空间模态,PC为时间模态。第一空间模态EOF(:,1),第一时间模态PC(1,:) 返回值F为特征值，diff为误差 (eof decomposition function as follows: function [EOF, PC, F, diff] = EOFcgx (X) EOF decomposition. Xm* n spatial dimension m, n is the time of sampling points Returns the value EOF spatial modes, PC is the time modes. The first space modal EOF (:, 1), the first time the modal PC (1, :) Return value F for eigenvalues, diff for error )

OMP算法对一维噪声信号去噪，具体过程可参考M.Elad的matlab包,容易理解，思路清晰(OMP algorithm for one-dimensional noise signal de-noising, the specific process may refer M.Elad the matlab package, easy to understand, clear thinking)

跳频信号是新的通信与雷达信号的一种，其保密性强，不易受噪声干扰，但解调复杂。本程序给出了高斯白噪声情况下调频信号的模拟过程，供通信和雷达专业的师兄弟参考。这是本文论文一部分的程序(FH signal is a new kind of communications and radar signals, and its confidentiality, less susceptible to noise interference, but the demodulation complexity. This procedure gives the Gaussian white noise process of FM analog signals for communication and radar fellow professional reference. This is a part of this thesis, the procedures)

说明：  FIR数字滤波器的设计方法主要是建立在对理想滤波器频率特性作某种近似的基础上的。这些近似方法有窗函数法、频率抽样法、最佳一致逼近法。在这里只讨论窗函数法。程序中也是采用了这种方法。(FIR digital filter design method is mainly based on the frequency characteristics of the ideal filter for some kind of approximation on the basis of. These approximate methods are a window function method, frequency sampling method, the best uniform approximation method. Here only to discuss the window function method. Procedure is also adopted this approach.)

MATLAB应用程序实例300个，包括图形应用篇、界面设计篇、图形处理篇、数值分析篇，相当经典！(they are Examples of MATLAB applications 300, including the application of article graphics, interface design articles, graphics processing papers, numerical analysis of articles, they are quite classic!)

此程序为simulink仿真程序，是对于川渝电网中珞璜火力发电机组进行的单机无穷大系统的仿真，其中发电机控制部分为实际运行中数据。(This procedure for the Simulink simulation program, is a simulation of a single machine infinite bus system for the Sichuan Chongqing Power Grid Luohuang thermal power generating units of the generator, control part is data in practical operation.)

该算法详细仿真了EKF、UKF以及PF三种方法，进行了对比，只需简单的调整参数就可以观察在不同条件下的滤波效果。(The algorithm detailed simulation of the EKF, UKF and PF three methods were compared, a simple adjustment of parameters can be observed under different conditions of the filtering effect.)

《数字信号处理：基于计算机的方法（第三版）》资源下载第一部分。 著者： （美）米特拉著 作译者： 孙洪等译 ISBN号： 7-121-02652-X 出版日期： 2006-06 出版社：电子工业出版社 内有书中事例所用的语音，图片和视频信号DEMO。()