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  • Research Article
  • Open Access

Efficient Closed-Loop Schemes for MIMO-OFDM-Based WLANs

EURASIP Journal on Advances in Signal Processing20062006:091919

https://doi.org/10.1155/ASP/2006/91919

  • Received: 28 December 2005
  • Accepted: 13 August 2006
  • Published:

Abstract

The single-input single-output (SISO) orthogonal frequency-division multiplexing (OFDM) systems for wireless local area networks (WLAN) defined by the IEEE 802.11a standard can support data rates up to 54 Mbps. In this paper, we consider deploying two transmit and two receive antennas to increase the data rate up to 108 Mbps. Applying our recent multiple-input multiple-output (MIMO) transceiver designs, that is, the geometric mean decomposition (GMD) and the uniform channel decomposition (UCD) schemes, we propose simple and efficient closed-loop MIMO-OFDM designs for much improved performance, compared to the standard singular value decomposition (SVD) based schemes as well as the open-loop V-BLAST (vertical Bell Labs layered space-time) based counterparts. In the explicit feedback mode, precoder feedback is needed for the proposed schemes. We show that the overhead of feedback can be made very moderate by using a vector quantization method. In the time-division duplex (TDD) mode where the channel reciprocity is exploited, our schemes turn out to be robust against the mismatch between the uplink and downlink channels. The advantages of our schemes are demonstrated via extensive numerical examples.

Keywords

  • Singular Value Decomposition
  • Wireless Local Area Network
  • Vector Quantization
  • Feedback Mode
  • Explicit Feedback

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Authors’ Affiliations

(1)
Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL 32611-6130, USA
(2)
Department of Electrical and Computer Engineering, University of Colorado, Boulder, CO 80309-0425, USA

References

  1. IEEE Standard 802.11a-1999 : Supplement to information technology-telecommunications and information exchange between systems-local and metropolitan area networks-specific requirements—part 11: wireless LAN medium access control (MAC) and physical layer (PHY) specifications: high speed physical layer (PHY) in the 5 GHz band. 1999.Google Scholar
  2. Liu J, Li J: A MIMO system with backward compatibility for OFDM-based WLANs. Eurasip Journal on Applied Signal Processing 2004, 2004(5):696-706. 10.1155/S111086570431022XView ArticleMATHGoogle Scholar
  3. IEEE 802.11-04/0889r6 : TGn Sync proposal technical specification. May 2005.Google Scholar
  4. Nanda S, Walton R, Ketchum J, Wallace M, Howard S: A high-performance MIMO OFDM wireless LAN. IEEE Communications Magazine 2005, 43(2):101-109.View ArticleGoogle Scholar
  5. Xia P, Zhou S, Giannakis GB: Adaptive MIMO-OFDM based on partial channel state information. IEEE Transactions on Signal Processing 2004, 52(1):202-213. 10.1109/TSP.2003.819986MathSciNetView ArticleGoogle Scholar
  6. Sampath H, Paulraj AJ: Joint transmit and receive optimization for high data rate wireless communication using multiple antennas. Proceedings of the 33rd Asilomar Conference on Signals, Systems and Computers (ACSSC '99), October 1999, Pacific Grove, Calif, USA 1: 215-219.Google Scholar
  7. ETSI : Broadband radio access networks (BRAN); HIPERLAN type 2: physical (PHY) layer. ETSI TS 101 475 V1.2.2 February 2005.Google Scholar
  8. Jiang Y, Li J, Hager WW: Joint transceiver design for MIMO communications using geometric mean decomposition. IEEE Transactions on Signal Processing 2005, 53(10):3791-3803.MathSciNetView ArticleGoogle Scholar
  9. Jiang Y, Li J, Hager WW: Uniform channel decomposition for MIMO communications. IEEE Transactions on Signal Processing 2005, 53(11):4283-4294.MathSciNetView ArticleGoogle Scholar
  10. Zhang J-K, Kavčić A, Wong KM: Equal-diagonal QR decomposition and its application to precoder design for successive-cancellation detection. IEEE Transactions on Information Theory 2005, 51(1):154-172.View ArticleMathSciNetMATHGoogle Scholar
  11. Chuah C-N, Tse DNC, Kahn JM, Valenzuela RA: Capacity scaling in MIMO wireless systems under correlated fading. IEEE Transactions on Information Theory 2002, 48(3):637-650. 10.1109/18.985982MathSciNetView ArticleMATHGoogle Scholar
  12. Li X, Huang H, Foschini GJ, Valenzuela RA: Effects of iterative detection and decoding on the performance of BLAST. Proceedings of IEEE Global Telecommunications Conference (GLOBECOM '00), November-December 2000, San Francisco, Calif, USA 2: 1061-1066.Google Scholar
  13. Zheng L, Tse DNC: Diversity and multiplexing: a fundamental tradeoff in multiple-antenna channels. IEEE Transactions on Information Theory 2003, 49(5):1073-1096. 10.1109/TIT.2003.810646View ArticleMATHGoogle Scholar
  14. Hassibi B: A fast square-root implementation for BLAST. Proceedings of the 34th Asilomar Conference on Signals, Systems and Computers (ACSSC '00), October-November 2000, Pacific Grove, Calif, USA 2: 1255-1259.Google Scholar
  15. Linde Y, Buzo A, Gray R: An algorithm for vector quantizer design. IEEE Transactions on Communications 1980, 28(1):84-95. 10.1109/TCOM.1980.1094577View ArticleGoogle Scholar
  16. Lebrun G, Gao J, Faulkner M: MIMO transmission over a time-varying channel using SVD. IEEE Transactions on Wireless Communications 2005, 4(2):757-764.View ArticleGoogle Scholar
  17. Chayat N: Tentative criteria for comparison of modulation methods. document: IEEE P802.11-97/96, September 1997Google Scholar
  18. Foschini GJ, Golden GD, Valenzuela RA, Wolniansky PW: Simplified processing for high spectral efficiency wireless communication employing multi-element arrays. IEEE Journal on Selected Areas in Communications 1999, 17(11):1841-1852. 10.1109/49.806815View ArticleGoogle Scholar
  19. Lu B, Yue G, Wang X: Performance analysis and design optimization of LDPC-coded MIMO OFDM systems. IEEE Transactions on Signal Processing 2004, 52(2):348-361. 10.1109/TSP.2003.820991MathSciNetView ArticleGoogle Scholar

Copyright

© Xiayu Zheng et al. 2006

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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