MATLAB: FMCW sweeptime Query!

fftfmcwfodlfmMATLABPhased Array System Toolboxradarsignal processingsimulink

I am working on fmcw radar with these parameters :

end

Kindly help me through this query, awaiting reply

Best Answer

I don't have your data to test it, but if you are using a 1ms sweeping time, then you need to update your sweep slope too. Instead of using

sweep_slope = 500e6/(5.5*600/3e8)

It should be

swee[_slope = 500e6/1e-3

HTH

Related Solutions

MATLAB: Triangular wave form Up and Down sweep problem?

The beat frequency computed from upsweep and downsweep are meant to be different. It is that difference help you resolve the range Doppler ambiguity. You can change the last two lines to

fb_rng = rootmusic(pulsint(y,'coherent'),2,hwav.SampleRate)
range = beat2range(fb_rng.',slope)

The result will be matching the expected value.

HTH

MATLAB: Out of Memory error!

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

Best Answer

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MATLAB: Triangular wave form Up and Down sweep problem?

MATLAB: Out of Memory error!

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