Patent ID: 8768285

Claim:
A wireless device comprising: a baseband unit; and a plurality of front-end units configured to perform diversity combining between signals received at a plurality of antennas from different wireless systems; the baseband unit and the plurality of front-end units are each provided in individual housings, the baseband unit and the plurality of front-end units are connected to each other by wire to transmit a wired signal, a transmitter provided in any one of the housings, the transmitter being configured to convert a second signal based on a reference clock into a radio signal and wirelessly transmit the radio signal as a clock synchronization signal, and one or more receivers that receive the clock synchronization signal and one or more PLLs that generate a clock synchronized with a reference clock signal which is obtained from the clock synchronization signal provided in one or more individual housings other than the housing having the transmitter provided therein, wherein the one or more individual housings other than the housing having the transmitter are synchronized to the radio signal.