Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2006-08-08
2006-08-08
Bayard, Emmanuel (Department: 2638)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
Reexamination Certificate
active
07088782
ABSTRACT:
In a communication system, and in particular a wireless Orthogonal Frequency Division Multiplexing (OFDM) communication system, the present invention provides systems for synchronizing data transmitted across a channel. The present invention may be used in a Multi-Input, Multi-Output (MIMO) system in which the data is transmitted from any number of transmitting antennas and received by any number of receiving antennas. The number of transmitting and receiving antennas does not necessarily have to be the same. Circuitry is provided for synchronizing the data in both the time domain and frequency domain. Time synchronization involves coarse time synchronization and fine time synchronization. Frequency synchronization involves coarse frequency offset estimation, fine frequency offset estimation, and frequency offset correction.
REFERENCES:
patent: 5732113 (1998-03-01), Schmidl et al.
patent: 5867478 (1999-02-01), Baum et al.
patent: 6088408 (2000-07-01), Calderbank et al.
patent: 6115427 (2000-09-01), Calderbank et al.
patent: 6125149 (2000-09-01), Jafarkhani et al.
patent: 6137847 (2000-10-01), Stott et al.
patent: 6148024 (2000-11-01), Ho et al.
patent: 6185258 (2001-02-01), Alamouti et al.
patent: 6188736 (2001-02-01), Lo et al.
patent: 6373861 (2002-04-01), Lee
patent: 6473467 (2002-10-01), Wallace et al.
patent: 6792035 (2004-09-01), Kontola
patent: 6888899 (2005-05-01), Raleigh et al.
patent: 6961388 (2005-11-01), Ling et al.
patent: 2002/0041635 (2002-04-01), Ma et al.
patent: 2002/0122381 (2002-09-01), Wu et al.
patent: 2002/0154705 (2002-10-01), Walton et al.
Mody, Apurva N. and Stuber, Gordon L., “Synchronization for MIMO OFDM Systems,” School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA.
Mody, Apurva N. and Stuber, Gordon L., “Parameter Estimation for MIMO OFDM Systems,” School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA.
Schmidle, Timothy M. and Cox, Donald C., “Robust Frequency and Timing Synchronization for OFDM,” IEEE Transactions on Communications, vol. 45, No. 12, Dec. 1997, pp. 1613-1621.
Alamouti, Siavash M., “A Simple Transmit Diversity Technique for Wireless Communications,” IEEE Journal on Select Areas in Communications, vol. 16, No. 8, Oct. 1998.
Li, Ye (Geoffrey), Seshadri, Nambirajan, and Ariyavisitakul, Sirikiat, “Channel Estimation for OFDM Systems with Transmitter Diversity in Mobile Wireless Channels,” IEEE Journal on Selected Areas in Communications, vol. 17, No. 3, Mar. 1999.
Tarokh, Vahid, Jafarkhani, Hamid, and Calderbank, A. Robert, “Space-Time Block Coding for Wireless Communications: Performance Results,” IEEE Journal on Selected Areas in Communications, vol. 17, No. 3, Mar. 1999.
Mody, Apurva N. and Stuber, Gordon L., “Efficient Training and Synchronization Sequence Structures for MIMO OFDM,” School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332 and Wi-LAN, Wireless Data Communications Inc., Atlanta, Georgia, pp. 1-7.
Tarokh, Vahhid, Jafarkhani Hamid, and Calderbank, A.R., “Space-Time Block Codes from Orthogonal Designs,” IEEE Transactions on Information Theory, vol. 45, No. 5, Jul. 1999.
Mody Apurva N.
Stuber Gordon L.
Bayard Emmanuel
Georgia Tech Research Corporation
Thomas Kayden Horstemeyer & Risley LLP
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