Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2003-04-07
2009-06-16
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S233000, C375S232000, C375S148000, C375S147000, C375S341000, C375S326000, C375S340000, C370S329000, C370S335000
Reexamination Certificate
active
07548598
ABSTRACT:
A system and method for improving performance of a digital communication system using forward error correction and interleaving. In the system, the channel equalization values are iteratively refined by providing a feedback of the estimated signal to the channel equalizer. More specifically, the system determines at least one estimate associated with a decision of a received signal corresponding to a transmitted signal, modulates at least one estimate and determines the equalization factors dependent upon the received signal and the modulated estimate. The system further iteratively determines the at least one estimate for a known number of iterations. In one aspect the system further combines a current one of the decisions with prior ones of the decisions in a known manner in the iterative process.
REFERENCES:
patent: 4365338 (1982-12-01), McRae et al.
patent: 5297166 (1994-03-01), Batruni
patent: 7035316 (2006-04-01), Smee et al.
patent: 2003/0117647 (2003-06-01), Kaku et al.
patent: 2004/0006733 (2004-01-01), Hamalainen et al.
patent: 2004/0179589 (2004-09-01), Yousef et al.
patent: 2005/0047489 (2005-03-01), Yousef et al.
patent: WO0072540 (2000-11-01), None
patent: WO02101940 (2002-12-01), None
Eleftheriou, E. and Falconer, D., “Adaptive Equalization Techniques for HF Channels,” IEEE Journal on Selected Areas in Communications, vol. SAC-5, No. 2, Feb. 1987, pp. 238-246.
Nieto, J.W., “Iterative Equalization and Decoding of Stanag 4539 9600 BPS HF Waveforms,” presented at Communication Systems, Networks, and Digital Signal Processing Symposium, Staffordshire University, School of Computing, Jul. 15-17, 2002.
Gosse, K., et al., “Iterative Hybrid Decision-Aided Equalization for Wireless Communications,” ICC 2001 IEEE International Conference on Communications, Helsinki, Finland, Jun. 11-14, 2001.
Lee, Y., et al., “Adaptive DFE with Regularization for Indoor Wireless Data Communications,” IEEE Global Telecommunications Conference, Phoenix, AZ, Nov. 3-8, 1997.
European Search Report for EP04008377.
Duane Morris LLP
Fan Chieh M.
Harris Corporation
Puente Eva
LandOfFree
Method and apparatus for iteratively improving the... 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 iteratively improving the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for iteratively improving the... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4108757