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NIPPON TELEGRAPH AND TELEPHINE CORPORATION

NIPPON TELEGRAPH AND TELEPHINE CORPORATION Patent applications
Patent application numberTitlePublished
20100317310DIRECTIVITY CONTROL SYSTEM, CONTROL DEVICE, COOPERATIVE STATION DEVICE, RECEPTION STATION DEVICE, AND METHOD OF CONTROLLING DIRECTIVITY - A directivity control system includes a first reception station device which receives an interference signal and a desired signal; a cooperative station device disposed at a different place from the first reception station device, which receives a signal using an antenna; and a control device which controls the directivity of an antenna of the first reception station device, wherein the control device regards a combination of the antenna of the first reception station device and the antenna of the cooperative station device as one array antenna, and calculates a sum, using a weight, of a received signal received using the antenna of the first reception station device and a received signal 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.12-16-2010