sampling rate conversion

Hello People,

I have been facing this problem for last so many days. I would be very
thankful to you if you can guide me.

I want to simulate doppler, which can be present in underwater
communicatons. Now, I have designed one algorithm based on linear
interpolation to correct doppler and it works fine for real data. It
corrects the doppler also.

But now I have modified my transmitter and receiver and want to check if
it corrects the doppler or not. As it is not possible to go for another sea
trial, can anybody please guide me on how to simulate doppler. I know that
due to doppler the signal expands or compresses, but how to do this in
simulations?

I have tried resampling function do this but after my training period i m
getting sharp peak which I should not get.

Thanking you

Very much.

Chintan