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Mobile Wireless Middleware, Operating Systems, and Applications. Third International Conference, Mobilware 2010, Chicago, IL, USA, June 30 - July 2, 2010. Revised Selected Papers

Research Article

ISI and ICI Suppression for Mobile OFDM System by Using a Hybrid 2-Layer Diversity Receiver

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  • @INPROCEEDINGS{10.1007/978-3-642-17758-3_2,
        author={Jing Gao and Tomohisa Wada},
        title={ISI and ICI Suppression for Mobile OFDM System by Using a Hybrid 2-Layer Diversity Receiver},
        proceedings={Mobile Wireless Middleware, Operating Systems, and Applications. Third International Conference, Mobilware 2010, Chicago, IL, USA, June 30 - July 2, 2010. Revised Selected Papers},
        proceedings_a={MOBILWARE},
        year={2012},
        month={10},
        keywords={beyond GI delay Doppler adaptive array carrier diversity},
        doi={10.1007/978-3-642-17758-3_2}
    }
    
  • Jing Gao
    Tomohisa Wada
    Year: 2012
    ISI and ICI Suppression for Mobile OFDM System by Using a Hybrid 2-Layer Diversity Receiver
    MOBILWARE
    Springer
    DOI: 10.1007/978-3-642-17758-3_2
Jing Gao1,*, Tomohisa Wada1,*
  • 1: University of the Ryukyus
*Contact email: gaojing722@yahoo.com, wada@ie.u-ryukyu.ac.jp

Abstract

An OFDM system is very sensitive to orthogonality relation. For a mobile wireless system, it is impossible to avoid Doppler-induced inter carrier interference (ICI). Moreover, while beyond guard interval delayed signal exists in channel, the delay-induced ICI and inter symbol interference (ISI) will occur. Although a conventional carrier diversity (CD) receiver can render the OFDM system less sensitive to the white-noise-likely ICI, but it requires significant channel knowledge. On the other hand, a pre-FFT adaptive array (AA) receiver can improve the instantaneous signal to interference-and-noise ratio (SINR) at the input of FFT. In this paper, a hybrid AA/CD two layers receiver is investigated not only on a tradeoff between high performance and low complexity, but also into a method for both ISI and ICI suppression. Simulation results show that a suitable combination of pre-FFT AA and post-FFT CD can provide good performance by comparison with conventional OFDM receiver in mobile wireless channel, especially, while ISI and ICI occur at the same time.

Keywords
beyond GI delay Doppler adaptive array carrier diversity
Published
2012-10-17
http://dx.doi.org/10.1007/978-3-642-17758-3_2
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