Patent ID: 8320851
Filing Date: 2012-11-27
Classification: H01Q,H04B

Abstract:
1. A wireless communication device comprising: an antenna unit including a plurality of antennas for transmitting and receiving wireless signals; an analog processing unit including receiving analog circuits and transmitting analog circuits corresponding to the respective plurality of antennas, the analog processing unit configured to process analog transmitting and received signals; a digital processing unit configured to process digital transmitting and received signals corresponding to the respective plurality of antennas; inter-antenna propagation loss determination means for determining propagation losses along transmission paths between the respective antennas of the wireless communication device; loopback transfer function gain acquisition means for acquiring, through loopback of a calibration signal between the respective antennas, gains of loopback transfer functions between respective antenna branches; loopback transfer function gain correction means for correcting, on the basis of the propagation losses between the respective antenna branches determined by the inter-antenna propagation loss determination means, the acquired gains of the loopback transfer functions between the respective antenna branches; correction coefficient determination means for determining, using the gains of the loopback transfer functions between the respective antenna branches corrected by the loopback transfer function gain correction means, a gain ratio among the receiving analog circuits of the respective antenna branches and a gain ratio among the transmitting analog circuits of the respective antenna branches, and determining, on the basis of the gain ratios, correction coefficients for performing gain calibration on the digital transmitting and received signals corresponding to the respective plurality of antennas; and gain calibration processing means for performing, using the correction coefficients for the respective antennas determined by the correction coefficient determination means, the gain calibration on the digital transmitting and received signals corresponding to the respective plurality of antennas.