Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2008-04-29
2011-10-25
Torres, Juan A (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S354000, C375S316000
Reexamination Certificate
active
08045600
ABSTRACT:
According to the teachings presented herein, a wireless communication apparatus compensates for timing misalignment in its received signal processing. In at least one embodiment, the apparatus estimates a set of path delays for a received signal and sets processing delays on the estimated path delays. The apparatus jointly hypothesizes combinations of fractional timing offsets for two or more paths, and computes a decision metric for each joint hypothesis that indicates the accuracy of the joint hypothesis. As non-limiting examples, the decision metric may be a signal quality metric, or a distance metric (such as between a measured net channel response and an effective net channel response reconstructed as a function of the combination of fractional timing offsets included in the joint hypothesis). The apparatus evaluates the decision metrics to identify a best estimate of timing misalignment, and correspondingly compensates coherent processing of the received signal.
REFERENCES:
patent: 6674815 (2004-01-01), Zangi
patent: 6839378 (2005-01-01), Sourour et al.
patent: 6922434 (2005-07-01), Wang et al.
patent: 7751511 (2010-07-01), Reial et al.
patent: 7822101 (2010-10-01), Reial
patent: 2004/0253934 (2004-12-01), Ryu et al.
patent: 2005/0047485 (2005-03-01), Khayrallah et al.
patent: 2005/0195889 (2005-09-01), Grant et al.
patent: 2005/0201447 (2005-09-01), Cairns et al.
patent: 2006/0007990 (2006-01-01), Cozzo et al.
patent: 2006/0029124 (2006-02-01), Grant et al.
patent: 2006/0188007 (2006-08-01), Daneshrad et al.
patent: 2006/0268962 (2006-11-01), Cairns et al.
patent: 2007/0047628 (2007-03-01), Fulghum et al.
patent: 2007/0098048 (2007-05-01), Cairns et al.
patent: 2007/0116100 (2007-05-01), Lindoff et al.
patent: 2007/0189364 (2007-08-01), Wang et al.
patent: 2008/0002759 (2008-01-01), Cairns et al.
patent: 2008/0267164 (2008-10-01), D'Alessandro
patent: 2009/0213944 (2009-08-01), Grant
patent: 2006/070320 (2006-07-01), None
patent: 2008/000367 (2008-01-01), None
Bottomley, “A generalized RAKE receiver for interference suppression,” IEEE Journal on Selected Areas of Communication, vol. 18, pp. 1536-1545, Aug. 2000.
Bottomley, “Optimizing the Performance of Limited Complexity RAKE Receivers,” Proc. 48th IEEE Vehicle Technology Conf., Ottawa, Canada, May 1998.
Fulghum, “Low Complexity Parameter Estimation for the Multi-antenna Generalized Rake Receiver,” IEEE 63rd Vehicular Technology Conference, 2006, VTC 2006-Spring, vol. 4, No., pp. 1874-1878, May 7-10, 2006.
Cairns Douglas A.
Grant Stephen J.
Reial Andres
Riback Mathias
Coats & Bennett P.L.L.C.
Telefonaktiebolaget LM Ericsson (publ)
Torres Juan A
LandOfFree
Method and apparatus for compensating for processing timing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for compensating for processing timing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for compensating for processing timing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4253593