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Tutors. Designing And Analyzing Radar Systems This sample
assignment shows techniques for designing and analyzing radar
systems and how you can perform radar system design and analysis
tasks such as waveform design, target detection, beamforming, and
space-time adaptive processing. file and execute the following
examples: 1) ex1.m 2) ex2.m 3) ex3.m ex1.m %Copyright 2013 The
MathWorks, Inc clear all;close all;clc;sAnt =
lowProfileArray('FrequencyRange',[2e9 ex2.m %Copyright 2013 The
MathWorks, Inc clear all;close all;clc;beamformingExample ex3.m
%Copyright 2013 The MathWorks, Inc clear all;close
all;clc;rangeDopplerStreamExample plotBeam.m %Copyright 2013 The
MathWorks, Inc [email protected]
2. if ii==1, %% Array Response figure('WindowStyle','docked');
polar(deg2rad(scanAz(:)),abs(resp)); ax = gca; else
polar(ax,deg2rad(scanAz(:)),abs(resp)); end viewSignals.m %
Copyright 2013 The MathWorks, Inc %% Setup Visuals if m == 1 sScope
= dsp.TimeScope('SampleRate',fs,...
'TimeSpan',10/prf,'Grid',true,... 'LayoutDimensions',[1
2],'MaximizeAxes','off', ... 'Position',[371 646 1000
409],'NumInputPorts',2);
set(sScope,'ActiveDisplay',2,'YLabel','Magnitude','Title','Collected
Signal')
set(sScope,'ActiveDisplay',1,'YLabel','Magnitude','Title','Transmitted
Signal') show(sScope); %% Range Doppler Map
figure('WindowStyle','docked') hrdmap =
imagesc(sgrid,rgrid,abs(rdmap)); xlabel('Speed (m/s)');
ylabel('Range (m)'); title('Range Doppler Map'); %% Detection and
Range Estimation figure('WindowStyle','docked') tgtrange = [NaN NaN
NaN]; pmax = tgtrange; hold on for n=1:3,
plot(sTgtMotion{n}.InitialPosition(1)*ones(2,1),[0 7e-5],'r:')
htext(n) = text(tgtrange(n),1.05*pmax(n),int2str(tgtrange(n)));
%#ok end legend('Initial Range') xlabel('Range (m)');
ylabel('Magnitude'); title ('Estimated Range') hbar =
sqrt(threshold)*ones(numel(fast_time),1); hline =
plot(range_gates,[hbar hbar]); % Threshold offset =
numel(sMFilt.Coefficients)-1; end %% Stream Signals
step(sScope,abs(s),abs(rsig)); % Ctrl + A to scale axis limits
set(hrdmap,'CData',abs(fliplr(rdmap))) drawnow 3.
set(hline(2),'YData',[intpulses(offset:numel(fast_time));
NaN*ones(offset-1,1)]) for n=1:3,
set(htext(n),'String',int2str(tgtrange(n)),'Position',[tgtrange(n)
1.05*pmax(n)]); end viewTrajectories.m %Copyright 2013 The
MathWorks, Inc if ii==1, %% Global Coordinate System
figure('WindowStyle','docked'); hold on; grid on antT = nan(3,N); %
Array trajectory tgtT = nan(3,N); % Target trajectory antT =
[antT(:,2:end) antpos/1e3]; tgtT = [tgtT(:,2:end) tgtpos/1e3]; hant
= plot3(antT(1,:),antT(2,:),antT(3,:),'LineWidth',2); htgt =
plot3(tgtT(1,:),tgtT(2,:),tgtT(3,:),'LineWidth',2,'Color','red');
axis([-100 100 -100 50 0 50]) xlabel('X'), ylabel('Y'), zlabel('Z')
title('Global Coordinate System','FontWeight','bold') view(40,48)
legend('Antenna','Target') %% Target Trajectory in Local Coordinate
System (from antenna perspective) h2 =
figure('WindowStyle','docked'); hold on; grid on axis([-130 0 6 13
0 50]) xlabel('Azimuth'), ylabel('Range'), zlabel('Elevation')
title('Local Coordinate System','FontWeight','bold') view(-40,48)
%% Array visualization figure('WindowStyle','docked');
viewArray(sAnt,'ShowSubarray','None') bx = get(gca,'Children');
hdots = bx(8); ndots = numel(get(hdots,'XData')); green =
ones(ndots,1)*[0 1 0]; view(40,48) else %% Highlight active arrays
mn=face(:)*ones(1,ndots); hlgt=repmat([mn(1,1:16) mn(2,17:32)
mn(3,33:48) mn(4,49:64)],3,1); set(hdots,'CData',green.*hlgt'); %%
Update global trajectories antT = [antT(:,2:end) antpos/1e3]; 4.
tgtT = [tgtT(:,2:end) tgtpos/1e3];
set(hant,'XData',antT(1,:),'YData',antT(2,:),'ZData',antT(3,:))
set(htgt,'XData',tgtT(1,:),'YData',tgtT(2,:),'ZData',tgtT(3,:)) end
%% Update local trajectory figure(h2)
plot3(AzEl(1),range/1e4,AzEl(2),'ro','MarkerSize',20-round(range/1e4))
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