How can i represent a matrix variable which has two-fold Toeplitz structure?

How can i represent a matrix variable which has two-fold Toeplitz structure?

Can you provide us a clear definition of two-fold Toeplitz? Bonus points if the definition is constructive, starting from building blocks which CVX supports, which might show you how to construct it in CVX.

I have already solved this problem. But still thanks for your attention!

Perhaps you can share your solution here.

I have encountered the same problem in the CVX optimization for the recovery of the atomic norm minimum of two-dimensional frequency data. May I refer to your solution?