How to generate a dataset in MATLAB for the given scenario ?

Hello all, I am working on Machine learning based classification task wherein I have to generate Traning dataset based on the following scenario in MATLAB but not getting it clearly:

Scenario: The system consists of single antenna Transmitter and multiple antenna receiver. The signal received at the receiver is given by the following expression.

----(1)

where , ,M indicates number of antennas at receiver, is transmitted signal and is zero mean circularly symmetric complex Gaussian with variance P i.e., , is a received vector and is given as and and it is a Rayleigh channel between transmitter and each antenna of receiver.

My query is that I am getting confused due to presence of multiple (M) antennas at receiver. So how can we produce a training data set with 10^5 samples for this given scenario.

Any help in this regard will be highly appreciated.