How to cerate 'H_dataset' in paper ' power of Power of Deep Learning for Channel Estimation and Signal Detection in OFDM Systems'

[ironman1996]

First, I want to express my thank to your repo. I want to use the method in 'Power of Deep Learning for Channel Estimation
and Signal Detection in OFDM Systems' while change its channel conditions, but I don't know how to create 'H_dataset'. I will be appreciate if you can give me a little help.