Patent ID: 8027315

Claim:
A method of communicating using time division duplex transmission on a given carrier frequency between a first transceiver and a second transceiver, the first transceiver including a first and second antenna providing polarisation diversity for transmission and reception of signals and the second transceiver including a third and fourth antenna providing polarisation diversity for transmission and reception of signals, the method comprising: transmitting a signal carrying a first data packet at the given carrier frequency from the first transceiver to the second transceiver using the first antenna and transmitting a signal carrying a second data packet at the given carrier frequency from the first transceiver to the second transceiver using the second antenna, wherein the first and second data packets each comprise an indication of which said antenna transmitted the respective data packet; receiving signals carrying the first and second data packets at each of the third and fourth antennas; at the second transceiver, selecting, on a basis of a property of said received signals, one of the first and second antennas for use for time multiplexed transmission and reception at the first transceiver and one of the third and fourth antennas for use for time multiplexed reception and transmission at the second transceiver; sending from said second transceiver to said first transceiver an indicator of the selected one of the first and second antennas; and communicating using time division duplex transmission at the given carrier frequency between the first transceiver and the second transceiver using the selected one of the first and second antennas and the selected one of the third and fourth antennas.