Patent ID: 8731038
Filing Date: 2014-05-20
Classification: H04B,H04L

Abstract:
1. A method for determining channel state information in an orthogonal frequency division multiplexing (OFDM) transmission scheme in a receiver, comprising: estimating a frequency selective interference noise covariance matrix per resource block, wherein a resource block comprises an aggregate of resource elements that are modulation structures that comprise one subcarrier by one symbol; obtaining a normalized channel matrix by weighting a channel matrix using the estimated frequency selective interference noise covariance matrix as an interference estimate; determining a channel equivalent matrix by multiplying the normalized channel matrix with all available precoding matrices; computing a post-equalization signal-to-interference plus noise ratio (SINR) as a function of an equalizer in use in the receiver using the determined channel equivalent matrix; deriving mutual information for each post-equalization SINR as a function of the modulation used; averaging the mutual information in sub-bands; and deriving channel state information from the averaged mutual information.