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Enhancing IEEE 802.11n WLANs using group-orthogonal code-division multiplex

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Abstract

The definition of the next generation of wireless networks is well under way within the IEEE 802.11 High Throughput Task Group committee. The resulting standard, to be called IEEE 802.11n, is expected to be a backward-compatible evolution of the successful IEEE 802.11a/g systems also based on multicarrier techniques. It can be anticipated that 802.11n systems will outperform its predecessors in terms of transmission rate and/or performance, mainly, due to the use of multiple antennae technology for transmission and reception. In this paper we propose to incorporate group-orthogonal (GO) code division multiplex (CDM) into the IEEE 802.11n specifications to further enhance its performance. It is shown how GO-CDM can take full advantage of the diversity offered by the multiple antennae and multicarrier transmission by using an iterative maximum likelihood (ML) joint detector. Furthermore, the use of GO-CDM does not compromise the backward compatibility with legacy systems.

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References

  1. Kaiser, S. (2002). OFDM code-division multiplexing in fading channels. IEEE Transactions on Communications, 50, 1266–1273.

    Article  Google Scholar 

  2. Yee, N., Linnartz, J.-P., & Fettweis, G. (1993). Multi-carrier CDMA in indoor wireless radio networks. In IEEE PIMRC (pp. 109–113), Yokohama, Japan, September 1993.

  3. Cai, X., Zhou, S., & Giannakis, G. (2004). Group-orthogonal multicarrier CDMA. IEEE Transactions on Communications, 52(1), 90–99.

    Article  Google Scholar 

  4. Riera-Palou, F., Femenias, G., & Ramis, J. (2006). On the design of group-orthogonal MC-CDMA systems. In Proceedings IEEE SPAWC, Cannes, France, July 2006.

  5. Riera-Palou, F., Femenias, G., & Ramis, J. (2006). Downlink performance of group-orthogonal multicarrier systems. In Proceedings IFIP PWC (pp. 389–400), Albacete, Spain, September 2006.

  6. Riera-Palou, F., & Femenias, G. (2007). Combining multicarrier code-division multiplex with cyclic delay diversity for future WLANs. In Proceedings IEEE SPAWC, Helsinki, Finland, June 2007.

  7. Yan, W., Sun, S., Li, Y., & Liang, Y. (2006). Transmit diversity schemes for MIMO-OFDM based wireless LAN systems. In Proceedings IEEE PIMRC (pp. 1–5), Helsinki, Finland, September 2006.

  8. Mujtaba, S. A. (2005). TGn sync proposal technical specification. doc.:IEEE 802.11-04/0889r7, Draft proposal, July 2005.

  9. Bauch, G., & Malik, J. (2006). Cyclic delay diversity with bit-interleaved coded modulation in orthogonal frequency division multiple access. IEEE Transactions on Wireless Communications, 8, 2092–2100.

    Article  Google Scholar 

  10. Hochwald, B., & ten Brink, S. (2003). Achieving near-capacity on a multiple-antenna channel. IEEE Transactions on Communications, 51, 389–399.

    Article  Google Scholar 

  11. Fincke, U., & Pohst, M. (1985). Improved methods for calculating vectors of short length in a lattice, including a complexity analysis. Mathematical Computing, 44, 463–471.

    Article  Google Scholar 

  12. Liu, J., & Li, J. (2005). Turbo processing for an OFDM-based MIMO system. IEEE Transactions on Wireless Communications, 4, 1988–1993.

    Article  Google Scholar 

  13. Erceg, V. (2003). Indoor MIMO WLAN channel models. doc.: IEEE 802.11-03/871r0, Draft proposal, November 2003.

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Authors and Affiliations

  1. Mobile Communications Group, Dept. of Mathematics and Informatics, University of the Balearic Islands, 07122, Palma, Mallorca (Illes Balears), Spain

    Guillem Femenias & Felip Riera-Palou

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  1. Guillem Femenias
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  2. Felip Riera-Palou
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Correspondence to Felip Riera-Palou.

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Femenias, G., Riera-Palou, F. Enhancing IEEE 802.11n WLANs using group-orthogonal code-division multiplex. Telecommun Syst 38, 37–44 (2008). https://doi.org/10.1007/s11235-008-9089-x

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  • DOI: https://doi.org/10.1007/s11235-008-9089-x

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