Patent ID: 8615203

Claim:
A communication device arranged to operate in accordance with a communication protocol in which a transmitting device is scheduled to commence a transmission at a time known in advance to a receiving device, the communication device comprising at least two antennas and being arranged to select one of those antennas to receive a transmission from a transmitting device by, immediately before the transmitting device is scheduled to commence its transmission: assessing a quality of a signal received by means of a first one of the antennas; assessing a quality of a signal received by means of a second one of the antennas; and determining, based on the assessed quality of the signals received by means of the first and second antennas, the antenna to be used for receiving the transmission from the transmitting device, wherein the communication device is arranged to: assess the quality of the signals received by the first and second antennas by assessing the quality of an unmodulated carrier received from the transmitting device before the transmitting device is scheduled to commence its transmission, and if it determines that the transmitting device is not transmitting an unmodulated carrier for sufficient time to enable the communication device to select which of the at least two antennas should be used to receive a transmission from that device, transmit to the transmitting device a request for it to transmit an unmodulated carrier for an extended period of time.