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. 22, 2004
Filed:
Feb. 29, 2000
Takashi Yano, Tokorozawa, JP;
Takaki Uta, Kokubunji, JP;
Nobukazu Doi, Hachioji, JP;
Toshiro Suzuki, Tama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a mobile communication system, the tracking of synchronization is conducted in a stable state even in a multipath environment. A delay profile detector calculates a delay profile a(n) using a despread signal for each processing unit n. A delay profile averaging unit averages a(n) to produce Ave(|a(n)| ). A data symbol detector conducts rake combining of the despread signal using a(n) and Ave(|a(n)| ). According to a(n) and Ave(|a(n)| , a weighting function unit calculates a representative value representing delay waves. A loop filter generates a control signal in response to the representative value. A clock controller controls a spread code generator according to the control signal.