James Crawford
Newbie level 3

Could someone explain to me or direct me to a source which explains how to find the correlation coefficient at each subcarrier in a multicarrier system, such as OFDM?
I know that the channel correlation matrix R_HH can be found by:
R_HH = E{H.H^T}
where H is the channel matrix and ^T is the matrix transpose. I presume that the channel matrix is in the frequency domain i.e. H_F=h(1),....,h(N), where N is the number of subcarriers.
I know that the channel correlation matrix R_HH can be found by:
R_HH = E{H.H^T}
where H is the channel matrix and ^T is the matrix transpose. I presume that the channel matrix is in the frequency domain i.e. H_F=h(1),....,h(N), where N is the number of subcarriers.