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.