Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2006-11-09
2010-12-28
Payne, David C (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S262000, C714S780000, C714S795000
Reexamination Certificate
active
07860194
ABSTRACT:
An apparatus and method are provided for normalizing input soft metric to a channel decoder in a wireless communication system. A demapper generates soft metric using an in-phase component (Xk) and a quadrature component (Yk) of a received modulated symbol (Rk), a channel fading coefficient (gk) and a constant value (c) defined by a modulation order of the received modulated symbol. A normalizer receives the soft metric, computes a normalized log likelihood ratio (LLR) by multiplying the soft metric by a ratio of the constant value to a noise variance value, transforms the normalized LLR into a desired range and a desired number of bits, and outputs an input LLR of the channel decoder.
REFERENCES:
patent: 6697443 (2004-02-01), Kim et al.
patent: 6871316 (2005-03-01), Wong et al.
patent: 6980602 (2005-12-01), Kleinerman et al.
patent: 2002/0122510 (2002-09-01), Yakhnich et al.
patent: 2005/0069057 (2005-03-01), Krupka
patent: 2007/0127605 (2007-06-01), Sindhushayana
patent: 1999-0079402 (1999-11-01), None
patent: WO 03/043201 (2003-05-01), None
Gu Young-Mo
Kim Min-Goo
Kim Sang-Hyo
Payne David C
Perez James M
Roylance Abrams Berdo & Goodman L.L.P.
Samsung Electronics Co,. Ltd.
LandOfFree
Method and apparatus for normalizing input metric to a... 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 normalizing input metric to a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for normalizing input metric to a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4193638