Patent ID: 8199855
Filing Date: 2012-06-12
Classification: H04B

Abstract:
1. A communication device for receiving and transmitting signals in the form of a series of bursts, each burst being at one of a plurality of different available transmission modes, the communication device comprising: two antennas; a receiver unit coupled to the antennas for preferentially receiving signals from a selected one of the antennas; a transmitter unit for forming a signal for transmission from a selected one of the antennas with a selected one of the transmission modes; an antenna selection unit for: a signal analysis unit configured to analyze each received burst in order to make a determination of whether that received burst meets a predetermined reception quality criterion; wherein the signal analysis unit is arranged to control the antenna selection unit in dependence on said determinations to: if a burst is to be received with a certain transmission mode and the last burst received with that transmission mode is determined to have been received above the reception quality criterion, preferentially receive the burst with the same antenna as was used to receive that last burst; if a burst is to be received with a certain transmission mode and the last burst received with that transmission mode is determined to have been received below the reception quality criterion, preferentially receive the burst with a different antenna from that which was used to receive that last burst; if a burst is to be transmitted with a certain transmission mode and the last burst received with that transmission mode is determined to have been received above the reception quality criterion, transmit the burst preferentially with the same antenna as was used to receive that last burst; and if a burst is to be transmitted with a certain transmission mode and the last burst received with that transmission mode is determined to have been received below the reception quality criterion, transmit the burst preferentially with a different antenna from that which was used to receive that last burst.