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

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NoYeah
NoYeah 2023-3-24
回答： Gokul Nath S J 2023-4-21
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?

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回答（1 个）

Gokul Nath S J
Gokul Nath S J 2023-4-21
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

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