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:
Oct. 24, 2006
Filed:
Jun. 17, 2004
Yuuta Nakaya, Kawasaki, JP;
Takeshi Toda, Kawasaki, JP;
Yuuta Nakaya, Kawasaki, JP;
Takeshi Toda, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An array antenna system comprises an array antenna unit including multiple antenna elements and multiple phase shifters for setting weighting coefficients of the associated antenna elements; and a weight controller that generates and outputs a control signal for adjusting the weighting coefficient for each of the antenna elements, using a known signal received at each of the antenna elements. The weight controller has a channel impulse response estimation unit that estimates a channel impulse response for each of the antenna elements based on a linear combination of a first received signal obtained from the known signal when a first set of weighting coefficients is set for the antenna elements and a second received signal obtained from the known signal when a second set of weighting coefficients is set for the antenna elements; and an output unit that outputs the control signal based on the estimated channel impulse responses.