Pulse or digital communications – Testing – Signal noise
Reexamination Certificate
2007-12-18
2007-12-18
Odom, Curtis B. (Department: 2611)
Pulse or digital communications
Testing
Signal noise
C375S319000, C375S324000
Reexamination Certificate
active
09870926
ABSTRACT:
A method for estimating an SNR-related parameter, such as ES/N0, from one or more symbols. The number of symbols within a predetermined number of symbols that fall within one or more collection areas is counted. The count is then associated with a value of the SNR-related parameter. This association may be performed through one or more lookup tables. In one application, a scaling factor is derived from the count. The scaling factor may be used to scale symbols before they are quantized and inputted into a trellis decoder such as a log-MAP decoder.
REFERENCES:
patent: 4627103 (1986-12-01), Fukuhara
patent: 5394439 (1995-02-01), Hemmati
patent: 5703526 (1997-12-01), Meyer
patent: 6108373 (2000-08-01), Fargues et al.
patent: 6201817 (2001-03-01), Sullivan
patent: 6484284 (2002-11-01), Smallcomb
patent: 6542558 (2003-04-01), Schulist et al.
patent: 6591390 (2003-07-01), Yagyu
patent: 6829313 (2004-12-01), Xu
patent: 6901117 (2005-05-01), Classon et al.
Bahl, L. R., et al.,Optimal Decoding of Linear Codes for Minimizing Symbol Error Rate; IEEE Transactions on Information Theory, Mar. 1974, pp. 284-287.
Benedetto, S., et al.,A Soft-Input Soft-Output Maximum A Posteriori(MAP)Module to Decode Parallel and Serial Concatenated Codes; TDA Progress Report, 42-127, Nov. 1996, pp. 1-20.
Berrou, Claude, et al.,Near Shannon Limit Error—Correcting Coding and Decoding: Turbo-Codes(1); IEEE, 1993, pp. 1064-1070.
Divsalar, D. and Pollara, F.,Turbo Trellis Coded Modulation with Iterative Decoding for Mobile Satellite Communications; Jet Propulsion Laboratory, California Institute of Technology, pp. 1-7.
Robertson, P., et al.,A Comparison of Optimal and Sub-Optimal MAP Decoding Algorithms Operating in the Log Domain; IEEE, 1995, pp. 1009-1013.
Viterbi, Andre J.,An Intutive Justification and a Simplified Implementation of the MAP Decoder for Convolutional Codes; IEEE Journal on Selected Areas in Communications, vol. 16, No. 2, Feb. 1998, pp. 260-264.
Eidson Donald Brian
Kons Sachar
Krieger Abraham
Murali Ramaswamy
Conexant Systems Inc.
Howrey LLP
Odom Curtis B.
LandOfFree
SNR-related parameter estimation method and system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with SNR-related parameter estimation method and system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SNR-related parameter estimation method and system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3891691