Performance analysis of joint switched diversity and adaptive modulation

Haewoon Nam, Young Chai Ko, Mohamed Slim Alouini

    Research output: Contribution to journalArticlepeer-review

    20 Citations (Scopus)

    Abstract

    In this paper, a simple and practical system based on a switched diversity scheme with adaptive modulation is presented. This system provides a reduced number of channel estimation while offering the optimum spectral efficiency given by a selection diversity system. In addition, the switching threshold is easily manipulated so as to make an efficient use of the trade-off between spectral efficiency and channel estimation overhead. An extension of switched diversity into a multiuser scheduling is later also considered. This switch-based multiuser access scheme results in a lower average feedback load than that for the optimal selection-based multiuser scheme. Numerical results show that we can obtain a trade-off between spectral efficiency and the feedback load by choosing the switching threshold appropriately.

    Original languageEnglish
    Article number4657324
    Pages (from-to)3780-3790
    Number of pages11
    JournalIEEE Transactions on Wireless Communications
    Volume7
    Issue number10
    DOIs
    Publication statusPublished - 2008 Oct

    Bibliographical note

    Funding Information:
    Manuscript received March 14, 2007; revised June 23, 2007; accepted July 2, 2007. The associate editor coordinating the review of this paper and approving it for publication was X. Xia. This work was supported by the center for Broadband OFDM Mobile Access (BrOMA) at POSTECH through the ITRC program of the Korean MIC, supervised by IITA (IITA-2005-C1090-0502-0008). This paper was presented in part at IEEE International Symposium on Information Theory, Nice, France, June 2007 and Signal Processing on Wireless Communications Workshop, London, U.K., June 2007.

    Keywords

    • Adaptive modulation
    • Multiuser diversity
    • Switch-based multiuser scheduling
    • Switched diversity

    ASJC Scopus subject areas

    • Computer Science Applications
    • Electrical and Electronic Engineering
    • Applied Mathematics

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