一、获取代码方式
获取代码方式1：
完整代码已上传我的资源： 【数字信号调制】基于matlab GUI BPSK调制+解调【含Matlab源码 644期】
获取代码方式2：
通过订阅紫极神光博客付费专栏，凭支付凭证，私信博主，可获得此代码。
备注：订阅紫极神光博客付费专栏，可免费获得1份代码（有效期为订阅日起，三天内有效）；
二、BPSK简介
1 BPSK调制过程
1.1 用旋转向量的角度理解BPSK调制
2 频谱效率
二进制相移键控的频谱效率是1bps/hz
计算方法
3 缺点
频谱效率低，我们要想办法提高频谱效率
三、部分源代码
function varargout = GUI_BPSK(varargin)% GUI_BPSK MATLAB code for GUI_BPSK.fig%GUI_BPSK, by itself, creates a new GUI_BPSK or raises the existing%singleton*.%%H = GUI_BPSK returns the handle to a new GUI_BPSK or the handle to%the existing singleton*.%%GUI_BPSK('CALLBACK',hObject,eventData,handles,...) calls the local%function named CALLBACK in GUI_BPSK.M with the given input arguments.%%GUI_BPSK('Property','Value',...) creates a new GUI_BPSK or raises the%existing singleton*. Starting from the left, property value pairs are%applied to the GUI before GUI_BPSK_OpeningFcn gets called. An%unrecognized property name or invalid value makes property application%stop. All inputs are passed to GUI_BPSK_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_BPSK% Last Modified by GUIDE v2.5 03-Dec- 19:45:43% Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct('gui_Name', mfilename, ...'gui_Singleton', gui_Singleton, ...'gui_OpeningFcn', @GUI_BPSK_OpeningFcn, ...'gui_OutputFcn', @GUI_BPSK_OutputFcn, ...'gui_LayoutFcn', [] , ...'gui_Callback', []);if nargin && ischar(varargin{1})gui_State.gui_Callback = str2func(varargin{1});endif nargout[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});elsegui_mainfcn(gui_State, varargin{:});end% End initialization code - DO NOT EDIT% --- Executes just before GUI_BPSK is made visible.function GUI_BPSK_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_BPSK (see VARARGIN)% Choose default command line output for GUI_BPSKhandles.output = hObject;s=round(rand(1,100)); %生成二进制基带数据并画出基带信号图N=1:100;%figure(1);subplot(311);stem(N,s);title('基带信号');grid on;Ps=1;M=2; %BPSK星座图d=sqrt(Ps)*sin(pi/M);A=[-1,1]*d;%subplot(312);scatter(real(A),imag(A),'filled');title('BPSK星座图');Maptable=[0;1]; %BPSK格雷码比特映射 for j=1:1:100for m=1:Mif isequal(s(j),Maptable(m,:)) Qu(j)= m*pi;x(j)=A(m);breakendendend%基带数据s携带的信息映射到X[n] Am=1; %载波调制T=0.0001; fc=6/T;Smpl=1000;deltaT=T/Smpl; %连续时间离散化间隔Ns=5; %画出Ns个符号的波形t=deltaT:deltaT:Ns*T; %离散时间序列for j=1:Nsindex=(j-1)*Smpl+1:j*Smpl; %第i个符号对应的离散时间序号g(index)=1; %矩形脉冲成型X(index)=Am*g(index).*cos(2*pi*fc*t(index)+Qu(ceil(index/50.01))); %载波调制信号end%subplot(313);plot(t,X);title('BPSK调制信号波形');SNR_dB=15; %定义信噪比SNR=10^(SNR_dB/10); %定义线性信噪比Ps=1;%发射功率Pn=Ps/SNR; %噪声方差z=sqrt(Pn/2)*(randn(size(x))+randn(size(x))*i); %生成白噪声h=1; %AWGN信道下，信道增益h=1y=h*x+z; %基带接受信号%figure(2);subplot(211);scatter(real(y(1:10)),imag(y(1:10)),'filled');title('BPSK接收星座图'); %y的星座图for j=1:length(y) Dist=abs(y(j)-A); %第j个接受信号与各星座图点的距离[~,Index]=min(Dist);%找到距离最近的点x_est(j)=A(Index); %得到发射调制信号的估计s_est(j)=Maptable(Index,:); %得到比特数据的估计endW=1:100;%subplot(212);stem(W,s_est);title('BPSK解调后信号');for n=1:15Pe_t(n)=sqrt(2)/4*erfc(sqrt(2*n));Pb_t(n)=sqrt(2)/4*erfc(sqrt(2*n));endPESUM=0;PBSUM=0;for n=1:15for m=1:1000SNR=n;Ps=1; Pn=Ps/SNR;z=sqrt(Pn/2)*(randn(size(x))+randn(size(x))*i);h=1;y=h*x+z;for j=1:length(y)Dist=abs(y(j)-A);[~,Index]=min(Dist);x_est(j)=A(Index);s_est(j)=Maptable(Index,:);endfor k=1:100if(s(k)+s_est(k)==1)PBSUM=PBSUM+1;endendfor k1=1:100if isequal(x(k1),x_est(k1))PESUM=PESUM+0;elsePESUM=PESUM+1;endendendPe(n)=PESUM/1000/100;Pb(n)=PBSUM/1000/100;PESUM=0;PBSUM=0;endSNRX=1:15;%figure(3);plot(SNRX,Pb); hold on;plot(SNRX,Pe);%scatter(SNRX,Pe_t);scatter(SNRX,Pb_t, 'filled');xlabel('信噪比 SNR(r/dB)');title('AWGN信道下误码率与误符号率曲线');%axis([1 15 0 0.15]);grid on;hold off;H=sqrt(1/2)*(randn+i*randn);Y=H*x+z;%figure(4);subplot(211);scatter(real(Y(1:10)),imag(Y(1:10)),'filled');title('BPSK信道均衡前星座图');Y1=Y/H;%subplot(212);scatter(real(Y1(1:10)),imag(Y1(1:10)),'filled');title('BPSK信道均衡后星座图');PESUM1=0;PBSUM1=0;for n=1:15for m=1:1000SNR=n;Ps=1; Pn=Ps/SNR;z=sqrt(Pn/2)*(randn(size(x))+randn(size(x))*i);Y1=(H*x+z)/H;for j=1:length(Y1)Dist=abs(Y1(j)-A);[~,Index]=min(Dist);x_est1(j)=A(Index);s_est1(j)=Maptable(Index,:);endfor k=1:100if(s(k)+s_est1(k)==1)PBSUM1=PBSUM1+1;endendfor k1=1:100if isequal(x(k1),x_est1(k1))PESUM1=PESUM1+0;elsePESUM1=PESUM1+1;endendendPe1(n)=PESUM1/1000/100;Pb1(n)=PESUM1/1000/100;PESUM1=0;PBSUM1=0;end
四、运行结果
五、matlab版本及参考文献
1 matlab版本
a
2 参考文献
[1] 沈再阳.精通MATLAB信号处理[M].清华大学出版社，.
[2]高宝建,彭进业,王琳,潘建寿.信号与系统——使用MATLAB分析与实现[M].清华大学出版社，.
[3]王文光,魏少明,任欣.信号处理与系统分析的MATLAB实现[M].电子工业出版社，.
如果觉得《【数字信号调制】基于matlab GUI BPSK调制+解调【含Matlab源码 644期】》对你有帮助，请点赞、收藏，并留下你的观点哦！
