Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2004-05-21
2011-11-22
Ahn, Sam K (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
Reexamination Certificate
active
08064528
ABSTRACT:
Techniques are described for carrier frequency offset (CFO) and channel estimation of orthogonal frequency division multiplexing (OFDM) transmissions over multiple-input multiple-output (MIMO) frequency-selective fading channels. A wireless transmitter forms blocks of symbols by inserting training symbols within two or more blocks of information-bearing symbols. The transmitter applies a hopping code to each of the blocks of symbols to insert a null subcarrier at a different position within each of the blocks of symbols, and a modulator outputs a wireless signal in accordance with the blocks of symbols. A receiver receives the wireless signal and estimates the CFO, and outputs a stream of estimated symbols based on the estimated CFO.
REFERENCES:
patent: 5127051 (1992-06-01), Chan et al.
patent: 6088408 (2000-07-01), Calderbank et al.
patent: 6188717 (2001-02-01), Kaiser et al.
patent: 6441786 (2002-08-01), Jasper et al.
patent: 6449245 (2002-09-01), Ikeda et al.
patent: 6487253 (2002-11-01), Jones, IV et al.
patent: 6707856 (2004-03-01), Gardner et al.
patent: 6850481 (2005-02-01), Wu et al.
patent: 6865175 (2005-03-01), Ritter
patent: 6959010 (2005-10-01), Bahrenburg et al.
patent: 7009931 (2006-03-01), Ma et al.
patent: 7065371 (2006-06-01), Kleinerman
patent: 7161973 (2007-01-01), Ghosh
patent: 2002/0122502 (2002-09-01), El-Gamal et al.
patent: 2002/0126740 (2002-09-01), Giannakis et al.
patent: 2002/0136327 (2002-09-01), El-Gamal et al.
patent: 2002/0146078 (2002-10-01), Gorokhov et al.
patent: 2003/0072452 (2003-04-01), Mody et al.
patent: 2003/0081569 (2003-05-01), Sexton et al.
patent: 2003/0156594 (2003-08-01), Trott et al.
patent: 2003/0169824 (2003-09-01), Chayat
patent: 2004/0013211 (2004-01-01), Lindskog et al.
patent: 2004/0037214 (2004-02-01), Blasco Claret et al.
patent: 2004/0120410 (2004-06-01), Priotti
patent: 2004/0166887 (2004-08-01), Laroia et al.
patent: 2004/0190636 (2004-09-01), Oprea
patent: 2005/0058217 (2005-03-01), Sandhu et al.
U.S. Appl. No. 60/449,729, p. 1-25, filed on Feb. 24, 2003.
B.M. Hochwald et al., “Achieving Near-Capacity on a Multiple-Antenna Channel,” IEEE Transactions on Communication, vol. 51, No. 3, pp. 389-399, Mar. 2003.
G.J. Saulnier et al, “Performance of an OFDM Spread Spectrum Communications system Using Lapped Transforms,” in Proc. MILCOM Conf., vol. 2, 1997, pp. 608-612.
G.J. Saulnier et al., “Performance of a Spread Spectrum OFDM System in a Dispersive Fading Channel with Interference,” in Proc. MILCOM Conf., vol. 2, 1998, pp. 679-683.
I. Koffman et al., “Broadband Wireless Access Solutions Based on OFDM Access in IEEE 802.16,” IEEE Communications Magazine, vol. 40, No. 4, pp. 96-103, Apr. 2002.
L. Wei et al., “Space-Time-Frequency Block Coding Over Rayleigh Fading Channels for OFDM Systems,” Proceedings of the International Conference on Communication Technology, ICCT 2003, vol. 2, pp. 1008-1012, Apr. 2003.
L. Wei et al., “Synchronization Requirements for Multi-user OFDM on Satellite Mobile and Two-Path Rayleigh Fading Channels,” IEEE Transactions on Communications, vol. 43, No. 2/3/4, pp. 887-895, Feb.-Apr. 1995.
N. Yee et al., “BER of Multi-Carrier CDMA in an Indoor Rician Fading Channel,” Conference Record of the Twenty-Seventh Asilomar Conference on Signals, Systems and Computers, pp. 426-430, 1993.
P. Xia et al., “Bandwidth-and Power-Efficient Multicarrier Multiple Access,” IEEE Transactions on Communications, vol. 51, No. 11, pp. 1828-1837, Nov. 2003.
S. Kaiser et al., “A Flexible Spread-Spectrum Multi-Carrier Multiple-Access System for Multi-Media Applications,” in Procedures of 8thIEEE International Symposium PIMRC, vol. 1, 1997, pp. 100-104.
S. Zhou et al, “Frequency-Hopped Generalized MC-CDMA for Multipath and Interference Suppression,” in Proc. MILCOM Conf., vol. 2, Los Angeles, CA Oct. 22-25, 2000, pp. 937-941.
W.Y. Zou et al., “COFDM: An Overview,” IEEE Transactions on Broadcasting, vol. 41, No. 1, pp. 1-8, Mar. 1995.
Y. Xin et al., “Space-Time Constellation-Rotating Codes Maximizing Diversity and Coding Gains,” in Procedures of Global Telecommunications Conference, Nov. 2001, pp. 455-459.
Z. Wang et al, “Complex-Field Coding for OFDM Over Fading Wireless Channels,” IEEE Transactions on Information Theory, vol. 49, No. 3, pp. 707-720, Mar. 2003.
Z. Wang et al., “Joint Coding-Precoding with Low-Complexity Turbo Decoding,” IEEE Transactions on Wireless Communications, vol. XXX, No. XXX, pp. 1-11, 2003.
M. Guillaud et al., “Multi-Stream Coding for MIMO OFDM Systems With Space-Time-Frequency Spreading,” Wireless Personal Multimedia Communications, the 5thInternational Symposium, vol. 1, pp. 120-124, Oct. 27-30, 2002.
Y. Gong et al., “Space-Frequency-Time Coded OFDM for Broadband Wireless Communications,” Global Telecommunications Conference, GLOBECOM '01, IEEE, Vo. 1, pp. 519-523, Nov. 25-29, 2001.
Zhengdao Wang et al., “Linearly Precoded or Coded OFDM Against Wireless Channel Fades?,” Third IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications, Taoyuan, Taiwan, pp. 267-270, Mar. 20-23, 2001.
Srihari Adireddy et al., “Optimal Embedding of Known Symbols for OFDM,” in Procedures International Conference, ASSP, vol. 4, Salt Lake City, UT, May 2001.
Yan Xin et al., “Space-Time Diversity Systems Based on Linear Constellation Precoding,” IEEE Transactions on Wireless Communications, vol. 2, No. 2, pp. 294-309, Mar. 2003.
Yan Xin et al., “Space-Time Diversity Systems Based on Unitary Constellation-Rotating Precoders,” in Procedures International Conference, Speech, Signal Process., Salt Lake City, UT, pp. 2429-2432, May 7-11, 2001.
Alexandra Duel-Hallen et al., “Long-Range Predication of Fading Channels,” IEEE Signal Processing Magazine, pp. 62-75, May 2000.
Anastasios Stamoulis et al., “Block FIR Decision-Feedback Equalizers for Filterbank Precoded Transmissions with Blind Channel Estimation Capabilities,” IEEE Transactions on Communications, vol. 49, No. 1, pp. 69-83, Jan. 2001.
Anders Furuskar et al., “EDGE: Enhanced Data Rates for GSM and TDMA/136 Evolution,” IEEE Personal Communications, vol. 6, No. 3, pp. 56-66, Jun. 1999.
Amos Lapidoth et al., “Fading Channels: How Perfect Need “Perfect Side Information” be?,” in Procedures IEEE Information Theory Communications Workshop, pp. 36-38, Jun. 1999.
Ayman F. Naguib et al., “Increasing Data Rate Over Wireless Channels,” IEEE Signal Processing Magazine, vol. 17, pp. 76-92, May 2000.
Akbar M. Sayeed et al., “Joint Multipath-Doppler Diversity in Mobile Wireless Communications,” IEEE Transactions on Communications, vol. 47, No. 1, pp. 123-132, Jan. 1999.
A.P. Clark et al., “Adaptive Channel Estimator for an HF Radio Link,” IEEE Transactions on Communications, vol. 37, No. 9, pp. 918-926, Sep. 1989.
Anna Scaglione et al., “Filterbank Transceivers Optimizing Information Rate in block Transmissions Over Dispersive Channels,” IEEE Transactions on Information Theory, vol. 45, No. 3, pp. 1019-1032, Apr. 1999.
Anna Scaglione et al., “Redundant Filterbank Precoders and Equalizers Part I: Unification and Optimal Designs,” IEEE Transactions on Signal Processing, vol. 47, No. 7, pp. 1988-2022, Jul. 1999.
Anna Scaglione et al., “Redundant Filterbank Precoders and Equalizers Part II: Blind Channel Estimation, Synchronization, and Direct Equalization,” IEEE Transactions on Signal Processing, vol. 47, No. 7, pp. 2007-2022, Jul. 1999.
B. Muquet et al., “Reduced Complexity Equalizers for Zero-Padded OFDM Transmissions,” Procedures of International Conference on ASSP, vol. 5, pp. 2973-2976, Jun. 2000.
Babak Hassibi et al., “How Much Training is Needed in Multiple-Antenna Wireless Links?” IEEE Transaction
Giannakis Georgios B.
Ma Xiaoli
Ahn Sam K
Regents of the University of Minnesota
Shumaker & Sieffert P.A.
LandOfFree
Estimating frequency-offsets and multi-antenna channels in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Estimating frequency-offsets and multi-antenna channels in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Estimating frequency-offsets and multi-antenna channels in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4269766