Patent ID: 8553715

Claim:
A communication apparatus comprising: a first communication unit which sends and receives wireless communication using a first carrier frequency (f 1 ) via an antenna; a second communication unit which sends and receives wireless communication using a second carrier frequency (f 2 ) via a plurality of antennas wherein the second carrier frequency is more directive and suffers from higher propagation loss than the first carrier frequency (f 1 ); a second signal processing unit comprising a synchronization unit and an automatic gain control unit; and a first signal processing unit configured to determine when a first request to send via first carrier frequency (f 1 ) has been received by the first communication unit, configured to output a first indicator to the synchronization unit in response to the first request, configured to determine when a first data has been received via the first carrier frequency (f 1 ) via the first communication unit, and configured to output a second indicator to the synchronization unit, wherein the synchronization unit is configured upon receipt of the first indicator to determine whether a second request has been received by the second communication unit in order to determine packet position information, wherein the synchronization unit is configured to determine upon receipt of the second indicator whether a second data has been received by the second signal processing unit using the previously determined packet position information, and wherein the synchronization unit is configured to output a third indicator to the automatic gain control unit comprising processing a first automatic gain control value in the second data.