Patent ID: 8126504

Claim:
A method of controlling a wireless communication system in which a plurality of communication devices perform communication, each communication device having an antenna array and an array weight vector (hereinafter referred to as AWV) control circuit that changes at least one of an amplitude and a phase of a signal, the signal being transmitted from a plurality of antenna elements constituting the antenna array or received at the plurality of antenna elements, the method, when independently controls AWVs of at least two antenna elements among the plurality of antenna elements, comprising: (a) setting a fixed beam pattern in the antenna array possessed by a first communication device included in the plurality of communication devices, and transmitting a training signal from the first communication device; (b) receiving the training signal in a second communication device included in the plurality of communication devices while scanning a beam direction by changing an AWV of the antenna array possessed by the second communication device; (c) obtaining a data string describing a relation between an incoming direction and a received-signal characteristic in the second communication device based on a reception result of the training signal; (d) obtaining first AWVs having a main beam direction or a sub-beam direction in an incoming direction of plural or single signal in the second communication device, the incoming direction of plural or single signal being determined by using the data string; (e) obtaining second AWVs having a main beam direction or a sub-beam direction in an incoming direction of plural or single signal in the first communication device by carrying out the steps (a) to (d) after the transmitting operation and the receiving operation of the training signal are interchanged between the first and second communication devices; and (f) using an AWV combination of one of the first AWVs and one of the second AWVs for communication between the first and second communication devices.