TRANSMIT ANTENNA SUBSET SELECTION FOR RETRANSMISSION

摘要

A transmit switched antenna system utilizes one of several antennas selection protocols combined with feedback from a receiving device to take advantage of time and space transmission for the same information. A transmit device transmits first information over a first subset of a set of antennas and receives and ACK or NAK from the receiver along with a channel quality indicator. If a NAK is received, the transmitter selects a next antenna subset for transmission, based on the antenna selection protocol utilized. One protocol randomly selects the next subset and does not require the channel quality indicator. Another protocol determines the next antenna subset based on channel quality history and a third protocol selects the next antennas subset based on expectation of retransmissions for different subsets.