Generating a 2D delay-Doppler channel matrix

Hello DSP folks,
I was wondering if anyone here has any idea on 2D delay-Doppler channel and how to generate the channel matrix? Even a hint or a resource would be helpful. I just want to understand and visualize the channel nicely so that I can write a program on my own to generate the 2D channel matrix. I would be grateful if anyone has anything to share!
Thank you!

Hi, you may want to have a look at the Time Variable Acoutic Propagation Model from the Signal Processing Laboratory of the University of Faro. It's for Underwater Acoustics, but it does include plots of 2D delay-Doppler channels which might be of use to you.