Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2011-04-19
2011-04-19
Porta, David P (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
Reexamination Certificate
active
07928392
ABSTRACT:
System and method for blind echo cancellation in a received terahertz signal in a pulsed terahertz system for imaging or spectroscopy. Blind signal processing methods estimate the impulse response of the reflection mechanism and do not require a reference measurement to be taken. The reference signal may be recovered using a successive approach wherein the reference is first estimated using cross-correlation with the received signal and the received signal is represented as a function of the reference signal. For each successive echo, the calculated echo may be subtracted from the received signal and then the estimate of the reference signal is refined. Using an analytical approach, the parameters of a transfer function modeling the reflection mechanism may be estimated by optimizing a cost function.
REFERENCES:
patent: 4813073 (1989-03-01), Ling
patent: 5414766 (1995-05-01), Cannalire et al.
patent: 5623145 (1997-04-01), Nuss
patent: 5909426 (1999-06-01), Liau et al.
patent: 5939721 (1999-08-01), Jacobsen et al.
patent: 6317419 (2001-11-01), Olafsson et al.
patent: 6526141 (2003-02-01), Benesty et al.
patent: 6678254 (2004-01-01), Song
patent: 6766021 (2004-07-01), Kurtz et al.
patent: 6816204 (2004-11-01), Limberg
patent: 6996229 (2006-02-01), Gunther
patent: 7099822 (2006-08-01), Zangi
patent: 7162420 (2007-01-01), Zangi et al.
patent: 7362791 (2008-04-01), Tellado et al.
patent: 7386135 (2008-06-01), Fan
patent: 7400693 (2008-07-01), Langberg et al.
patent: 7618465 (2009-11-01), Klein et al.
patent: 2002/0191779 (2002-12-01), Pham
patent: 2007/0138392 (2007-06-01), Cole
patent: 2008/0309577 (2008-12-01), Mittleman et al.
Bereskin & Parr LLP / S.E.N.C.R.L., s.r.l.
Porta David P
T-Ray Science Inc.
Taningco Marcus H
LandOfFree
Systems and methods for blind echo cancellation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Systems and methods for blind echo cancellation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems and methods for blind echo cancellation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2716313