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:
May. 06, 2014
Filed:
May. 15, 2012
Yoshihisa Nakayama, Kawasaki, JP;
Noriaki Kono, Kawasaki, JP;
Yoshihisa Nakayama, Kawasaki, JP;
Noriaki Kono, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A base station receives from a mobile station, a reference signal that includes two or more sequences of a fixed length and calculates, as information for uplink signal synchronization at the mobile station, delay with respect to a reference time of the reference signal. The base station includes a first correlator that calculates the delay and a first correlation value calculated by correlating known sequences and the reference signal received during a first interval set based on the reference time and including a period equivalent to the fixed length; a second correlator that calculates a second correlation value by correlating the known sequences and the reference signal received during a second interval different from the first interval and including a period equivalent to the fixed length; and a corrector that based on a comparison result of the first and the second correlation values, determines whether to correct the calculated delay.