Patent ID: 8615268

Claim:
A wireless communications device, comprising: N (where N≧4) receiving antennas ( 111 , 112 , 113 , 114 ) for receiving signals from a first base station (LTE 2 ) and a second base station (GSM 3 ) having differing wireless formats; a reception control unit for switching the N receiving antennas at predetermined time intervals, receiving signals from the first base station (LTE 2 ) using M (where 2≦M≦N) of the receiving antennas and receiving signals from the second base station (GSM 3 ) using the N receiving antennas; signal strength detector for detecting signal strengths respectively corresponding to signals received from the first base station or the second base station by the receiving antennas; and reception level determination units for determining a reception level in a cell of the first base station on the basis of the M signal strengths detected by the signal strength detector when signals are received from the first base station using M of the receiving antennas, and determining a reception level in a cell of the second base station on the basis of N signal strengths detected by the signal strength detector when signals are received from the second base station using the N receiving antennas, wherein, the reception control unit i) constantly receives signals from the first base station (LTE 2 ) during first time intervals from N receiving antennas, and during second time intervals by switching between the M (N>M) receiving antennas and ii) successively receives signals from the second base station (GSM 3 ) during said second time intervals by switching between sets of (N-M) antennas when N>M and 2≦N-M.