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Adding same (fully correlated) Phase-noise to two LO paths

RFStuff

Dear All,

I have 4 LO paths (LO0, LO90, LO180 and LO270)  with 25% duty cycle clock output wave forms.

These wave forms are almost squarish and captured form another LO generation circuit simulation.

Currently, I using the captured files of the 4-waveforms for PSS/Pnoise simulation of the receiver circuit.

I want to add  phasenoise to the 4 LO paths.  I have a phase-noise profile file.

But, the important thing I want is :- The phasenoise of LO0 and LO180 should be completely co-related and the phasenoise of  LO90 and LO270 should be completely co-related.

How this can be achieved.

Could anybody please help in this regard.

Kind Regards,

  • in reply to RFStuff

    Er, good point. Sorry, I'd forgotten (and it makes complete sense) that the source has to be sinusoidal. You'll have to use a conventional noise file (I'm a bit nervous whether this will actually correctly correlate the noise in frequency if you do this though).

    Might be worth contacting customer support so that we can think about this properly and answer it more robustly than a quick answer in the forums...

    Regards,

    Andrew.

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