【数字信号调制】基于QPSK实现调制和解调含Matlab源码

1 简介

本课题是对数学通信中的QPSK的调制与解调进行了研究与设计,利用Matlab程序语言对QPSK进行调制与解调的仿真,使得我们对于QPSK数字调制系统的过程更加清晰,以便于更好的理解调制与解调的过程.而且设计中用程序语言编写程序分析了QPSK系统抗噪声的能力,通过将理论误码率和仿真误码率的比较,我们客观的,形象的了解误码率的性能.在Matlab中仿真结果与理论基本一致,这对理解QPSK系统的性能起到很大的帮助,并为我们进一步未来科技发展中研究通信中的调制与解调提供了有效的参考依据.​

2 部分代码

function varargout = GUI_2FSK(varargin)% GUI_2FSK MATLAB code for GUI_2FSK.fig%      GUI_2FSK, by itself, creates a new GUI_2FSK or raises the existing%      singleton*.%%      H = GUI_2FSK returns the handle to a new GUI_2FSK or the handle to%      the existing singleton*.%%      GUI_2FSK('CALLBACK',hObject,eventData,handles,...) calls the local%      function named CALLBACK in GUI_2FSK.M with the given input arguments.%%      GUI_2FSK('Property','Value',...) creates a new GUI_2FSK or raises the%      existing singleton*.  Starting from the left, property value pairs are%      applied to the GUI before GUI_2FSK_OpeningFcn gets called.  An%      unrecognized property name or invalid value makes property application%      stop.  All inputs are passed to GUI_2FSK_OpeningFcn via varargin.%%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one%      instance to run (singleton)".%% See also: GUIDE, GUIDATA, GUIHANDLES% Edit the above text to modify the response to help GUI_2FSK% Last Modified by GUIDE v2.5 30-Nov-2018 14:09:53% Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct('gui_Name',       mfilename, ...                   'gui_Singleton',  gui_Singleton, ...                   'gui_OpeningFcn', @GUI_2FSK_OpeningFcn, ...                   'gui_OutputFcn',  @GUI_2FSK_OutputFcn, ...                   'gui_LayoutFcn',  [] , ...                   'gui_Callback',   []);if nargin && ischar(varargin{1})    gui_State.gui_Callback = str2func(varargin{1});end​if nargout    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});else    gui_mainfcn(gui_State, varargin{:});end% End initialization code - DO NOT EDIT​% --- Executes just before GUI_2FSK is made visible.function GUI_2FSK_OpeningFcn(hObject, eventdata, handles, varargin)% This function has no output args, see OutputFcn.% hObject    handle to figure% eventdata  reserved - to be defined in a future version of MATLAB% handles    structure with handles and user data (see GUIDATA)% varargin   command line arguments to GUI_2FSK (see VARARGIN)% Choose default command line output for GUI_2FSKhandles.output = hObject;​​​

3 仿真结果

4 参考文献

[1]李强强. 基于MATLAB的QPSK的调制与解调的仿真[J]. 数字化用户, 2013, 000(036):3-3.

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