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:
Jun. 16, 2009
Filed:
Nov. 12, 2004
Tsuyoshi Shimomura, Kawasaki, JP;
Dai Kimura, Kawasaki, JP;
Tetsuhiro Futami, Kawasaki, JP;
Morihiko Minowa, Kawasaki, JP;
Tsuyoshi Shimomura, Kawasaki, JP;
Dai Kimura, Kawasaki, JP;
Tetsuhiro Futami, Kawasaki, JP;
Morihiko Minowa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The invention relates to an apparatus and a method for estimating a fading frequency of incoming received waves in a receiving station of a radio communication system or radio transmission system. An object of the invention is to estimate a fading frequency efficiently and accurately without substantially complexing the configuration of the system. To this end, the invention provides an apparatus for estimating a fading frequency from a pilot signal in a reception signal, which includes a calculation unit for calculating a magnitude of a complex product of two symbols that are received at different instants, and an estimation unit for estimating a fading frequency according to the calculated magnitude of the complex product.