How do I convert this math expression to MATLAB code?

Assume there are 2T numbers of input as U with Noise and noise has 0 mean with identical matrix size m

If my assumption is correct what would be the matlab code for this line of equation

Answer 1

[Walter Roberson]

U = arrayfun(@(idx) randn(m,m), 1:2*T, 'uniform', 0);

[Tianyi Chai]

Thank you Walter!