The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2009
Filed:
Jul. 11, 2002
Yoshiharu Doi, Gifu, JP;
Yasutaka Ogawa, Sapporo, JP;
Takeo Ohgane, Sapporo, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Japan as represented by President of Hokkaido University, Hokkaido, JP;
Abstract
A radio unit () separates a signal from a specific terminal among signals from array antennas (#-#) based on a reception weight vector calculated by a reception weight vector calculator (). A reception response vector calculator () derives a reception response vector of a propagation path for the signal from the specific terminal. A transmission response vector estimator () regards an estimation result of the reception response vector calculator () as a composite waveform of a function of a plurality of frequencies, determined in accordance with a Doppler frequency, and predicts a transmission response vector at a time point of transmission by obtaining coefficients of respective function. A transmission weight vector calculator () controls antenna directivity in transmission, based on a prediction result of the transmission response vector estimator ().