Patent ID: 7085572

Claim:
A wireless phone that wirelessly communicates with a wireless base station capable of transmitting a different word for synchronization to each of a plurality of mobile phones with which the wireless base station wirelessly communicates by using space division multiplexing, comprising: receiving means for receiving the word for synchronization sent from a wireless base station; and sending means for sending the word for synchronization to the wireless base station, the word for synchronization being sent preceding a main data that is a content of communication, wherein the wireless base station extracts communication data relating to a wireless phone with which the wireless base station is communicating, by: (a) defining a reference signal containing a word for synchronization that is sent to the wireless phone with which the wireless base station is communicating; (b) obtaining a second signal that is estimated to be a signal relating to the communication data by forming a directivity pattern, using a plurality of first signals that are seguentially received via an antenna; (c) sequentially calculating based on the reference signal and the second signal; (d) adiusting the second signal by seguentially adiusting the directivity pattern by reflecting a result of the calculation; and (e) regarding the adjusted second signal as communication data sent from the wireless phone with which the wireless base station is communicating.