MATLAB: Out of Memory error!

antennaMATLABnarrowband tx arrayphased arrayPhased Array System Toolboxradarsignal processingsimulink

I am scanning from azimuth 1 to 45 by using 20by20 URA narrowband tx array block. The input port 'W' is being fed by a function block which is coded as follows :
function y = SIGNAL_STEER(signal)
coder.extrinsic('phased.URA', 'steervec', 'getElementPosition');
  y=zeros(400,45);
 az=45;
 fc=36e9;
 v=3e8;
 lambda=v/fc;
  ss=phased.URA('Size',[20 20],'ElementSpacing' , lambda/2);
 elem_pos=(getElementPosition(ss)/lambda);
   for  le=1:1:az;
     sv=steervec(elem_pos,le);
     complex_arr=conj(sv);
%      y=zeros(size(sv));
     y=complex_arr;
   end
end
My signal is of 50000by1 dimension, output 'y'is 400by1 and it must be a column vector. When this signal is reflected back from the target and fed into Rx narrowband array block having same configuration as of Narrowband tx array block I get output dimension of 50000by400 which I believe is correct as my URA is 20by20. I believe that my dimensions are correct but I am getting out of memory error! How to resolve it

Best Answer

I'm a bit confused by your code snippet. For example, your input, signal, is never used in the function, so I'm not sure what you intended to do with this code. This being said, you don't have to use extrinsic for phased.URA as it supports codegen. I would just do
   function y = SIGNAL_STEER
    az=45;
    fc=36e9;
    v=3e8;
    lambda=v/fc;
    persistent ss stv;
    if isempty(ss)
      ss=phased.URA('Size',[20 20],'ElementSpacing' , lambda/2);
    end
    if isempty(stv)
      stv = phased.SteeringVector('SensorArray',ss,'PropagationSpeed',v);
    end
    y = conj(step(stv,fc,1:1:az));
  end
BTW I still cannot reproduce the out of memory issue.
HTH
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