digital communications - How to use "Filter" matlab function to apply channel to signal?

I need to use filter Matlab function to describe the following :

H: MR x MT

x: N x MT

How to use filter to get a received signal y=H*x?

EDIT 1:

I am working on a simulation OFDM system and got x as N+Ncp x MT. Of course, I can change dimension and get MT x N+Ncp, where Ncp- length of cyclic prefix and N- subcarriers.

Will be it correctly if I take a product H * x?