New MATLAB file

03 P1765 Baseline EVM Algorithms/OFDM/F_Plot_Constellation_Diagram_OFDM.m

+function F_Plot_Constellation_Diagram_OFDM(Sideal,Symb,params)
+
+    % This function plots the reference and received signal constellation
+    % diagrams and saves it in the evm_results_folder which was taken as
+    % input from the user in F_UserInputs_Rx().
+    % The constellation diagram is saved with the filename which was taken as
+    % input from the user in F_UserInputs_Rx().
+    % This version has been tested on several monitors and resolutions to
+    % ensure that it plots reliable constellation diagrams without any adjustment.
+    %
+    % Inputs:
+    %   Sideal:     Ideal OFDM symbols from ideal signal
+    %   Symb:       Recovered OFDM Symbols
+    %   params:     Structure containing all the basic communication parameters    
+    
+    global structGlobal
+
+    % Create figure
+    figure1 = figure('NumberTitle','off');
+
+    % Create axes
+    axes1 = axes('Parent',figure1);
+    hold(axes1,'on');
+   
+    % Create receiver signal constellation plot
+    X2 = real(Symb(1:params.Nc*params.NS));
+    Y2 = imag(Symb(1:params.Nc*params.NS));
+    plot(X2,Y2,'DisplayName','Received Symbols','MarkerSize',6,'Marker','o','LineWidth',1,'LineStyle','none','Color',[1 0 0]);
+
+    % Create reference signal constellation plot
+    X1 = real(Sideal(1:params.Nc*params.NS));
+    Y1 = imag(Sideal(1:params.Nc*params.NS));
+    plot(X1,Y1,'DisplayName','Ideal Symbols','MarkerSize',8,'Marker','*','LineWidth',2,'LineStyle','none','Color','k');    
+    
+    plot(params.Ac*cos(pi*(0:360)/180),params.Ac*sin(pi*(0:360)/180),...
+        'DisplayName','Average Level','LineWidth',2,'LineStyle','-','Color',[0 0 1]);
+    
+    % Create xlabel
+    xlabel('In-Phase (I)','HorizontalAlignment','center','FontSize',24);    
+    
+    % Create ylabel
+    ylabel('Quadrature (Q)','HorizontalAlignment','center','FontSize',24);
+
+    % Create title
+    stri = strcat(structGlobal.SISmn,' 64-QAM Constellation');
+    title(stri,'VerticalAlignment','bottom','HorizontalAlignment','center','FontWeight','bold','FontSize',24);
+
+    % Create legend
+    legend1 = legend(axes1,'show');
+    % Placement of plot legend in MATLAB plot window
+    set(legend1,'Position',[0.60 0.03 0.35 0.08],'FontSize',14);
+
+    % Set the remaining axes/figure properties
+    axis square
+    box(axes1,'on');
+    set(axes1,'XLim',[-params.N/2 params.N/2]); 
+    set(axes1,'xtick',(-params.N/2:1:params.N/2));
+    set(axes1,'YLim',[-params.N/2 params.N/2]); 
+    set(axes1,'ytick',(-params.N/2:1:params.N/2));
+    set(axes1,'FontSize',24,'GridAlpha',1,'XGrid','on','YGrid','on');
+    
+    % Move the plot box up to accomodate the legend
+    current_position = get(gca, 'Position');
+    set(gca, 'Position', current_position + [0, +0.02, 0, +0.02]);
+    
+    % Set the actual height and width of the box
+    width = 5;
+    height = 5;
+    set(gcf, 'Units', 'Inches', 'Position', [1, 1, width+1, height+1], 'PaperUnits', 'Inches', 'PaperSize', [width, height])
+    set(gca, 'Fontsize', 14);
+    
+    % Saving figure as graphic file in current directory (plot must still be present in MATLAB plot window)
+    stri_fig = fullfile(structGlobal.evm_results_folder,strcat(structGlobal.filename_constellation,'.jpg'));
+    set(figure1,'PaperPositionMode','auto');
+    print(figure1,stri_fig,'-djpeg','-r300');
+
+end