RF CW signal generator in MATLAB/Simulink

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Fumihiko Sato
Fumihiko Sato 2022-8-18
评论： Fumihiko Sato 2022-8-18
Hello everyone,
I am trying to create the CW (Continuous Wave) at the specific frequency (What I want is varry around 900 MHz) like the RF signal generator to use it as an interferer of the primary signal from the transmitter
What I understand is we can just use the sinwave source at desire frequency. Then we will have a signal in frequency domain.
anyway, I tried to simulate using the DSP sinewave and Spectrum analyzer (as shown below) but seems not as I expected (I generated at 900 MHz, stop time = infinity. But center of signal is showing at 0 Hz)
I am not sure there is any misconfigure on my configuration?
So, this is still be possible to simulate the CW source at RF frequency?
Best Regards,
Fumihiko Sato

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Abderrahim. B
Abderrahim. B 2022-8-18
Hi!
Spectrum analyzer block inherits sample rate from the sineWave block, as it is shown on the sinewave wave block the sample rate was not set with respect to sampling theorem ( I assume you know this theorem).
Check the below picture.
f is equal to to 900e6.
Hope this helps.
  1 个评论
Fumihiko Sato
Fumihiko Sato 2022-8-18
Dear Issa,
I completely forget about the sampling theorem while doing that.
Really appreciate your help. Thank you.
Fumihiko Sato

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