Patent ID: 7003324

Claim:
A base station apparatus comprising: a first antenna element group comprising a plurality of vertical polarization antenna elements; a second antenna element group comprising a plurality of horizontal polarization antenna elements; a reception weight combining section that generates a first combined signal for said first antenna element group and a second combined signal for said second antenna element group, said first combined signal is generated by multiplying a signal received by each antenna element of said first group with a weight and combining the weighted signals of said first antenna element group, said second combined signal is generated by multiplying a signal received by each antenna element of said second group with a weight and combining the weighted signals of said second antenna element group; a selection section that measures reception power of the first combined signal and the second combined signal and selects one of said first antenna element group and said second antenna element group based on the measured reception powers; a transmission weight combining section that multiplies a transmit signal with a weight applied by said reception weight combining section to a signal received by an antenna element of said selected antenna element group; and a diversity transmission section that transmits the transmit signal from said selected antenna element group.