Get Sensor positions manually in a uniform linear array (phased.ula) in phased array system toolbox

Question

Rakesh Reddy 2022-6-30

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1751200-get-sensor-positions-manually-in-a-uniform-linear-array-phased-ula-in-phased-array-system-toolbox

评论： Rakesh Reddy 2022-7-7

How can we give sensor positions manually in a uniform linear array? Initially I used Phased Array System toolbox where I got microphone positions using phased.ula. Now, If I want to specify the exact positions using phased.ula, How can I do that?

array = phased.ULA('NumElements',9,'ElementSpacing',0.05);

The above one is giving me an array of microphones placed at a spacing of 0.05 with a center microphone at (0,0,0).

Now, How do I give the positions manually??

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Answer 1

Chunru 2022-7-7

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1751200-get-sensor-positions-manually-in-a-uniform-linear-array-phased-ula-in-phased-array-system-toolbox#answer_1001985

在 MATLAB Online 中打开

% Get the position of the array
array = phased.ULA('NumElements',9,'ElementSpacing',0.05);
p = getElementPosition(array)
p = 3×9
         0         0         0         0         0         0         0         0         0
   -0.2000   -0.1500   -0.1000   -0.0500         0    0.0500    0.1000    0.1500    0.2000
         0         0         0         0         0         0         0         0         0
% For ULA, you cannot set the position directly.
% You can use conformal array which allow you to specify position
a1 = phased.ConformalArray('ElementPosition', p);
a1.ElementPosition
ans = 3×9
         0         0         0         0         0         0         0         0         0
   -0.2000   -0.1500   -0.1000   -0.0500         0    0.0500    0.1000    0.1500    0.2000
         0         0         0         0         0         0         0         0         0
% Change the element position
a1.ElementPosition(2,5) = 0.001;     % change one coordinate only as an example
a1.ElementPosition
ans = 3×9
         0         0         0         0         0         0         0         0         0
   -0.2000   -0.1500   -0.1000   -0.0500    0.0010    0.0500    0.1000    0.1500    0.2000
         0         0         0         0         0         0         0         0         0