SELECTING EITHER OPEN OR CLOSED LOOP MIMO ACCORDING TO WHICH HAS THE GREATEST ESTIMATED CHANNEL CAPACITY

摘要

MIMO OFDM receiver which periodically forms a channel estimate and compares : a: an estimate of the capacity of the channel if the transmitter were to make use of the receiver's channel estimate (closed loop) with b: an estimate of the capacity of the channel if the transmitter were to make no use of channel estimate (open loop), and send data on the channel estimate to the transmitter only when (b - a) > k, where k is a pre-set threshold.