Patent ID: 7953171

Claim:
A computer implemented method for use in performing channel training in a multiple input, multiple output (MIMO) based multicarrier system having a MIMO channel with multiple spatial channels, comprising: receiving a data frame from a remote transmitter via a MIMO channel having at least a first spatial channel and a second spatial channel, said data frame having a per stream training portion carrying channel training symbols to separately train said first spatial channel and said second spatial channel and a data portion carrying user data, said data portion carrying first user data in said first spatial channel and second user data in said second spatial channel; determining, using said received data frame, a first modulation coding scheme used to modulate and code said first user data and a second modulation coding scheme used to modulate and code said second user data; estimating power loading information for said data frame based on said first modulation coding scheme and said second modulation coding scheme; and using said estimated power loading information to calibrate constellation points for said first and second user data.