RF CW signal generator in MATLAB/Simulink

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

Answer 1

[Abderrahim. B]

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.

[Fumihiko Sato]

Dear Issa,

I completely forget about the sampling theorem while doing that.

Really appreciate your help. Thank you.

Fumihiko Sato