Patent ID: 8554149

Claim:
A directivity control system comprising: a first reception station device configured to receive an interference signal and a desired signal; a cooperative station device configured to receive a signal using an antenna, the cooperative station device being disposed at a different place from the first reception station device; and a control device configured to control the directivity of an antenna of the first reception station device, wherein the control device is configured to regard a combination of the antenna of the first reception station device and the antenna of the cooperative station device as one array antenna, and calculate a sum, using weight coefficients W 1 and W 2 , of a received signal X 1 received using the antenna of the first reception station device and a received signal X 2 received using the antenna of the cooperative station device to compose a directivity pattern having a null in an arrival direction of the interference signal in the array antenna, the weight coefficients W 1 and W 2 being obtained from an inverse matrix of a correlation matrix and a transpose matrix of a steering vector, the received signal X 1 being assigned a weight by using the weight coefficient W 1 , and the received signal X 2 being assigned a weight by using the weight coefficient W 2 .