Why I can`t modifty the starting frequency in phased.FMCWWaveform?

Why the matlab limit that basic property?

I am trying this for whole day and can`t solve this.

this makes users too uncomfortable

why this toolbox never consider carrier frequency?

why?

fs = 1e4 % Smapling Frequency [Hz]
fc = 2.4e9 % Carrier Frequecny [Hz]
B = 300e3 % chirp Bandwidth [Hz]
f_start = fc - B/2 % chirp start frequency [Hz]
f_end = fc + B/2 % chirp end frequency [Hz]
waveform = phased.FMCWWaveform('SweepTime',SweepTime,...
    'SweepBandwidth',B,...
    'SweepDirection','UP',...
    'SweepInterval','Symmetric',...
    'SampleRate',fs,...
    'NumSweeps',NumSweeps);

why?why?why?why?why?why?why?why?why?why?why?why?why?why?why?why?why?why?why?why?why?why?why?why?why?why?

I tried the below but non of them are works!

    'OperatingFrequency',f0,...
    'StartFrequency', f_start,...
    'EndFrequency', f_end,...

it says I cannot access to such property. why?

reference

why this thing never consider fc?

Answer 1

[Gokul Nath S J]

Hi NoYeah,

Based on your query, it seems that you want to consider the start frequency as well as the sweep bandwidth. I kindly recommend you to use the chirp function of MATLAB for such computation.

For further information on this issue, kindly refer the below mentioned link.

https://www.mathworks.com/help/signal/ref/chirp.html

Also, please refer the following link for non-linear waveform generation.

https://www.mathworks.com/help/phased/ref/phased.nonlinearfmwaveform-system-object.html

Thanks,

Gokul Nath S J