Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2007-12-18
2007-12-18
Chan, Wing (Department: 2616)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
C370S206000, C370S281000
Reexamination Certificate
active
10128756
ABSTRACT:
In a communication system, and in particular a wireless Orthogonal Frequency Division Multiplexing (OFDM) communication system, the present invention provides systems for estimating parameters of a channel across which a signal is transmitted. 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 calculating parameters indicative of the characteristics of the communication channel. Estimates of channel parameters may include channel estimates and noise variance estimates.
REFERENCES:
patent: 5732113 (1998-03-01), Schmidl et al.
patent: 5867478 (1999-02-01), Baum et al.
patent: 6029058 (2000-02-01), Namgoong et al.
patent: 6058105 (2000-05-01), Hochwald 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: 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: 6771706 (2004-08-01), Ling et al.
patent: 6792035 (2004-09-01), Kontola
patent: 6850481 (2005-02-01), Wu et al.
patent: 6888899 (2005-05-01), Raleigh et al.
patent: 6952454 (2005-10-01), Jalali et al.
patent: 6961388 (2005-11-01), Ling et al.
patent: 6985434 (2006-01-01), Wu et al.
patent: 6996195 (2006-02-01), Kadous
patent: 7010029 (2006-03-01), Naguib et al.
patent: 7110350 (2006-09-01), Li et al.
patent: 7133459 (2006-11-01), Onggosanusi et al.
patent: 7139321 (2006-11-01), Giannakis 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.
patent: 2002/0191703 (2002-12-01), Ling et al.
patent: 2003/0043928 (2003-03-01), Ling et al.
patent: 2006/0227904 (2006-10-01), Mueller-Weinfurtner 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.
BAE Systems Information and Electronic Systems Integration Inc.
Chan Wing
Long Daniel J.
Mais Mark A.
LandOfFree
Estimating channel parameters in multi-input, multi-output... 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 channel parameters in multi-input, multi-output..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Estimating channel parameters in multi-input, multi-output... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3834629