reading at UCA elements
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Hi
I need to receive the signal at different elemnents of UCA
I am using the following code
sUCA = phased.UCA('NumElements',5,'Radius',2.0);
% First signal
t = linspace(0,0.3,300)';
t1= zeros(size(t));
t1(201:205)= 1;
% Second Signal
t2= zeros(size(t));
t2(101:105)= 1;
angle_of_arrival = [30;0];
x = collectPlaneWave(sUCA,[t1 t2],angle_of_arrival',fc);
subplot(221)
plot(t,abs(x(:,1))); title('Element 1 (magnitude)');
axis tight; ylabel('Magnitude');
subplot(222)
plot(t,abs(x(:,2))); title('Element 2 (magnitude)');
axis tight; ylabel('Magnitude');
subplot(223)
plot(t,abs(x(:,3))); title('Element 3 (magnitude)');
axis tight; xlabel('Seconds'); ylabel('Magnitude');
subplot(224)
plot(t,abs(x(:,4))); title('Element 4 (magnitude)');
axis tight; xlabel('Seconds'); ylabel('Magnitude');
The problem I am facing is that all the antennas are receving the same magnitude . But as far as my understanding the antenna at least one antenna should not receive the signal
Please suggest some thing Best Regards
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Honglei Chen
2019-1-30
0 个投票
Why would you say taht at least one antenna should not receive the signal? You are using isotropic element in the array so every element can receive the signal regardless the incoming direction. As to the magnitude, it is because the toolbox assumes that the signal is at far field so the signal strength is the same across the array.
HTH
5 个评论
uzmeed
2019-1-31
Honglei Chen
2019-1-31
Ah, that is because you used collectPlaneWave which ignores the element response. See the Algorithm part of the documentation
Instead of using collectPlaneWave, replace it with
sCollector = phased.Collector('Sensor',sUCA,'OperatingFrequency',fc);
x = step(sCollector,[t1 t2],angle_of_arrival');
You should be able to see the effect of element response.
HTH
uzmeed
2019-2-1
Honglei Chen
2019-2-4
The algorithm is for general purpose, not specific to radar.
uzmeed
2019-2-4
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