Problem with a LinearFMWaveform property?

I have this bit of code in a script:

 waveform{n_wav} = phased.LinearFMWaveform('SampleRate', fs, ...
    'PulseWidth',tps(n_wav), ...
    'SweepBandwidth', bw, ...
    'PRF', prfs(n_wav), ...
    'SweepInterval','Symmetric',...
    'OutputFormat', 'Pulses', ...
    'CoefficientsOutputPort',true, ...
    'PRFOutputPort', true ...
    );

When I run the script, i get these errors:

Error using phased.internal.AbstractPulseWaveform (line 140)
Unrecognized property 'CoefficientsOutputPort' for System object
'phased.LinearFMWaveform'.

Error in phased.internal.AbstractContinuousPhasePulseWaveform (line 49)
        [e-mail](varargin{:});

Error in phased.internal.AbstractLinearFMWaveform (line 55)
        [e-mail]ulseWaveform(varargin{:});

Error in phased.LinearFMWaveform (line 109)
        [e-mail](varargin{:});

Error in sim_main (line 259)
    waveform{n_wav} = phased.LinearFMWaveform('SampleRate', fs, ...

It seems like the code doesn't recognize the CoefficientsOutputPort property but this appears to be a supported property of this object. Any suggestions for what may be causing these errors?

[Anjaneyulu Bairi]

Hi,

With the given code I am not able to reproduce the error , can you attach the file or post the code?

[George]

What matlab version are you using? It could be that you are using an old version in which the phased.LinearFMWaveform does not have that property. If you just create a default LFMWaveform and print it to the command line, do you see that property?

Answer 1

[Shivam]

Hi Richard,

It is my understanding that you're encountering an issue where the "CoefficientsOutputPort" property is not recognized when you attempt to configure a linear FM pulse waveform System object with the "phased.LinearFMWaveform" function, using a specific set of name-value pairs.

It is important to note that the "CoefficientsOutputPort" property became available for the "phased.LinearFMWaveForm" function starting with the MATLAB R2020b release. Therefore, I suggest verifying the version of MATLAB you are currently using.

You can consider executing your code in a more recent version of MATLAB that includes support for this property.

You can refer to the following documentation to know more about the "phased.LinearFMWaveform" function and its properties: https://www.mathworks.com/help/releases/R2023b/phased/ref/phased.linearfmwaveform-system-object.html

I hope this information will be of assistance to you.

Thanks