Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2011-07-26
2011-07-26
Torres, Joseph D (Department: 2112)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
C714S774000
Reexamination Certificate
active
07987410
ABSTRACT:
Disclosed herein are various embodiments of methods, systems, and apparatus for encoding OFDM packets in a digital communication system. In one exemplary method embodiment, LDPC codewords in an IEEE 802.11 wireless transmission are shortened, decreasing the iterations necessary to insure accurate communications. The codewords are shortened by adding known bits in predetermined locations in the last data symbol of a packet.
REFERENCES:
patent: 4047151 (1977-09-01), Rydbeck et al.
patent: 4320511 (1982-03-01), Koga et al.
patent: 5138315 (1992-08-01), Le Queau et al.
patent: 5392037 (1995-02-01), Kato
patent: 5598388 (1997-01-01), Van Maren et al.
patent: 5699365 (1997-12-01), Klayman et al.
patent: 5717394 (1998-02-01), Schwartz et al.
patent: 5784362 (1998-07-01), Turina
patent: 6029265 (2000-02-01), Itoi et al.
patent: 6157326 (2000-12-01), Van Der Vleuten et al.
patent: 6256323 (2001-07-01), Benayoun et al.
patent: 6285681 (2001-09-01), Kolze et al.
patent: 6289000 (2001-09-01), Yonge, III
patent: 6332209 (2001-12-01), Eroz et al.
patent: 6347122 (2002-02-01), Chen et al.
patent: 6370153 (2002-04-01), Eng
patent: 6397367 (2002-05-01), Park et al.
patent: 6397368 (2002-05-01), Yonge et al.
patent: 6437711 (2002-08-01), Nieminen et al.
patent: 6442129 (2002-08-01), Yonge et al.
patent: 6445314 (2002-09-01), Zhang et al.
patent: 6522665 (2003-02-01), Suzuki et al.
patent: 6553540 (2003-04-01), Schramm et al.
patent: 6574211 (2003-06-01), Padovani et al.
patent: 6621873 (2003-09-01), Lee et al.
patent: 6625762 (2003-09-01), Le Dantec
patent: 6633856 (2003-10-01), Richardson et al.
patent: 6658381 (2003-12-01), Hellwig et al.
patent: 6665831 (2003-12-01), Yoshida et al.
patent: 6707869 (2004-03-01), Zhang
patent: 6763025 (2004-07-01), Leatherbury et al.
patent: 6766489 (2004-07-01), Piret et al.
patent: 6829299 (2004-12-01), Chujoh et al.
patent: 6915472 (2005-07-01), Jones, IV et al.
patent: 6975254 (2005-12-01), Sperschneider et al.
patent: 6976203 (2005-12-01), Kurtas et al.
patent: 6990059 (2006-01-01), Anikhindi et al.
patent: 7002900 (2006-02-01), Walton et al.
patent: 7003042 (2006-02-01), Morelos-Zaragoza et al.
patent: 7055086 (2006-05-01), Lam
patent: 7079550 (2006-07-01), Padovani et al.
patent: 7103554 (2006-09-01), Sperschneider et al.
patent: 7139959 (2006-11-01), Hocevar
patent: 7139964 (2006-11-01), Shen et al.
patent: 7178080 (2007-02-01), Hocevar
patent: 7184426 (2007-02-01), Padovani et al.
patent: 7184713 (2007-02-01), Kadous et al.
patent: 7324605 (2008-01-01), Maltsev et al.
patent: 7345989 (2008-03-01), Sadri et al.
patent: 7346037 (2008-03-01), Yun et al.
patent: 7378586 (2008-05-01), Okazaki
patent: 7409001 (2008-08-01), Ionescu et al.
patent: 7433825 (2008-10-01), Sperschneider et al.
patent: 7499427 (2009-03-01), Padovani et al.
patent: 7502597 (2009-03-01), Murata et al.
patent: 7519030 (2009-04-01), Cimini et al.
patent: 7526432 (2009-04-01), Sperschneider et al.
patent: 7607073 (2009-10-01), Cheong et al.
patent: 7613978 (2009-11-01), Jalali et al.
patent: 7623553 (2009-11-01), Bhushan et al.
patent: 7668248 (2010-02-01), Hocevar
patent: 7685500 (2010-03-01), Jacobsen et al.
patent: 7692087 (2010-04-01), Okazaki et al.
patent: 7693115 (2010-04-01), Yun et al.
patent: 7698623 (2010-04-01), Hedberg et al.
patent: 2003/0097629 (2003-05-01), Moon et al.
patent: 2004/0148560 (2004-07-01), Hocevar
patent: 2005/0257119 (2005-11-01), Blankenship et al.
Lu, B.; Xiaodong Wang; Narayanan, K.R.; LDPC-based space-time coded OFDM systems over correlated fading channels: Performance analysis and receiver design, IEEE Transactions on Communications, vol. 50, Issue 1, Jan. 2002 pp. 74-88.
Gruenbacher, D.M.; Serener, A.; , “Performance of coded OFDM in a fading environment using high rate low-density parity-check codes,” Telecommunications Conference, 2001. GLOBECOM '01. IEEE , vol. 1, no., pp. 504-508 vol. 1, 2001.
Yoshimochi, N.; Hiramoto, T.; Mizuki, A.; Chang-Jun Ahn; Sasase, I.; , “LDPC coded unitary space-time modulated OFDM system in broadband mobile channel,” Electronics Letters , vol. 39, No. 13, pp. 994-995, Jun. 26, 2003.
Khiam-Boon Png; Xiaoming Peng; Chin, F.; , “Performance studies of a multi-band OFDM system using a simplified LDPC code,” Ultra Wideband Systems, 2004. Joint with Conference on Ultrawideband Systems and Technologies. Joint UWBST & IWUWBS. 2004 International Workshop on , vol., no., pp. 376-380, May 18-21, 2004.
Mohammad M. Mansour and Naresh R. Shanhhag; “Turbo decoder architectures for low-density parity check codes”, Global Communications Conference (Globecomm) (IEEE, 2002), pp. 1383-1388.
Huaning Niu, Manyuan Shen, James A. Ritcey and Hui Liu; Performance of clustered OFDM with low density parity check codes over dispersive channels, 2002 IEEE.
Lu et al, LDPC-Based Space-Time Coded OFDM Systems Over Correlated Fading Channels: Performance Analysis and Receiver Design, Jan. 2002, IEEE Transaction on Communications, vol. 50, No. 1, pp. 74-88.
Mansour et al. “Turbo Decoder Architectures for Low-Density Parity-Check Codes,” Nov. 2002, Proc. IEEE Global Telecomm. Conf. 2002 (GLOBECOM'02), Taipei, Taiwan, pp. 1383-1388.
International Search Report and Written Opinion on Patentability for PCT Pat. App. No. US05/28860, mailed Jun. 22, 2006.
Lu, B.; Xiaodong Wang; Narayanan, K.R.; LDPC-based Space Tme Coded OFDM Systems Over Correlated Fading Channels: Performance Analysis and Receiver Cesign, IEEE Transactions on Communications, vol. 50, Issue 1, Jan. 2002 pp. 74-88.
Office Action on U.S. Appl. No. 11/433,599, mailed May 5, 2010.
International Preliminary Report on Patentability for PCT/US2005/028860, issued Feb. 13, 2007.
Final Office Action on U.S. Appl. No. 11/433,599, mailed Oct. 28, 2010.
Hedberg David
Mittelsteadt Cimarron
Weng Wen Yen
Torres Joseph D
Xocyst Transfer AG L.L.C.
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