Training symbol format for adaptively power loaded MIMO

Abstract

Training symbol formats are provided for use in a MIMO based wireless communication system that uses adaptive power loading. In at least one embodiment, a training symbol format is used that is capable of enhancing training symbol signal to noise ratio (SNR).

1 . A method for use in performing channel training in a MIMO based multicarrier system, comprising:
 for a first training time slot within a data frame, dividing tones of a first OFDM training symbol among K spatial channels, wherein each of said tones of said first OFDM training symbol is transmitted in only one of said K spatial channels during said first training time slot; and   for a second training time slot within said data frame, dividing tones of a second OFDM training symbol among said K spatial channels, wherein each of said tones of said second OFDM training symbol is transmitted in only one of said K spatial channels during said second training time slot and tones from said first training time slot are not repeated within the same spatial channel in said second training time slot.