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:
Jan. 23, 2007
Filed:
Apr. 12, 2002
Takanori Iwamatsu, Kawasaki, JP;
Yasuharu Amezawa, Kawasaki, JP;
Takanori Iwamatsu, Kawasaki, JP;
Yasuharu Amezawa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An apparatus for estimating phase/amplitude characteristics of a propagation path. The apparatus removes, from a receive signal on a data channel on which known information is transmitted upon being time-multiplexed between items of unknown information, transmit information on this channel, which provides phase/amplitude information indicative of phase/amplitude characteristics that this data channel has suffered over the propagation path. The apparatus further removes from a receive signal on a data channel on which only unknown information is transmitted, transmit information on this channel, which provides phase/amplitude information indicative of phase/amplitude characteristics that this data channel has suffered over the propagation path. The apparatus includes an adder for adding the two phase/amplitude information and an estimation unit for estimating, from an adder output, a phase characteristic and an amplitude characteristic that each channel has suffered over the propagation path.