Mobile terminal, a base station, and a synchronization...

Pulse or digital communications – Spread spectrum – Direct sequence

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C375S152000

Reexamination Certificate

active

07061968

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)|2). A data symbol detector conducts rake combining of the despread signal using a(n) and Ave(|a(n)|2). According to a(n) and Ave(|a(n)|2, 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.

REFERENCES:
patent: 4122393 (1978-10-01), Gordy et al.
patent: 4538281 (1985-08-01), Rajan
patent: 5414729 (1995-05-01), Fenton
patent: 5533047 (1996-07-01), Mourot et al.
patent: 5590160 (1996-12-01), Ostman
patent: 5940433 (1999-08-01), Sawahashi et al.
patent: 6009118 (1999-12-01), Tiemann et al.
patent: 6028887 (2000-02-01), Harrison et al.
patent: 6154487 (2000-11-01), Murai et al.
patent: 6167037 (2000-12-01), Higuchi et al.
patent: 6347113 (2002-02-01), Hatch
patent: 6731622 (2004-05-01), Frank et al.
patent: 6741667 (2004-05-01), Suda
patent: 782295 (1997-07-01), None
patent: 818892 (1998-01-01), None
patent: 9321664 (1997-12-01), None
“Stable Tracking Scheme for CDMA Systems”, 1999, IEICE B5-151.
“Fast Cell Search Algorithm using Long Code Masking in DS-CDMA Asynchronous Cellular System” IEICE Technical Report RCS 96-122, Jan. 1997, pp. 57-63.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Mobile terminal, a base station, and a synchronization... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Mobile terminal, a base station, and a synchronization..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mobile terminal, a base station, and a synchronization... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3672692

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.