How to apply variable doppler to a signal?

[CarlosH]

Good evening,

As the title of this post says, I would like to generate a time-variable doppler effecto to a signal.

So far I know how to generate a doppler effect using MT Upconvert Baseband, so I have my signal moved in frequency easily.

The next step is to simulate a variable speed approach between tx and rx, so I need the doppler effect to be dynamic, according to a simple function such as 'sin' or 'triangle'.

I'm stuck at this point, I don't have come up with any idea, not even where to start... any help please?

[CarlosH]

For the record, I managed to do this creating a chirp signal and loading it to the MT Apply Flat Fading as fading profile.

Now I have my 'dancing' doppler

Cheers,