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. 07, 2003
Filed:
Mar. 11, 1999
Fumiaki Koizumi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Since a conventional adaptive equalizer handles an update quantity control parameter &mgr; as a fixed value, the update quantity control parameter &mgr; is not optimized adaptively to variation of a channel state and the BER characteristic is deteriorated. Thereupon, the invention controls a parameter &mgr; for controlling the update quantity of updating the impulse response of a channel by the adaptive algorithm operating portion according to an estimated BER value, by performing a BER estimating process by the BER estimating portion and performing an update quantity control parameter adjusting process by the update quantity control parameter adjusting portion , and increases the parameter &mgr; so that it follows variation of a channel state in an environment where the channel state is bad and severely varies and decreases the parameter &mgr; in a good environment where the channel state varies little, and thereby reduces deterioration in BER characteristic which could have been caused by a fact that the value of &mgr; is not optimized adaptively to variation of a channel state.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile