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    NTHUR > College of Electrical Engineering and Computer Science > Department of Electrical Engineering > EE Conference Papers >  A compact preamble design for synchronization in distributed MIMO OFDM systems

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    Title: A compact preamble design for synchronization in distributed MIMO OFDM systems
    Authors: Hung-Chin Wang;Chin-Liang Wang
    Teacher: 王晉良
    Date: 2011
    Publisher: Institute of Electrical and Electronics Engineers
    Relation: Proceedings of the 2011 IEEE Vehicular Technology Conference - Fall (VTC 2011-Fall), San Francisco, CA, SEP 05-08, 2011, Pages 1 - 4
    Keywords: cooperative communications
    multiple input multiple output (MIMO)
    distributed MIMO
    orthogonal frequency division multiplexing (OFDM)
    Abstract: In distributed multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) systems, signals arrive at the receiver on different timing and are characterized by distinct carrier frequency offsets (CFOs), which makes synchronization rather challenging than that associated with centralized MIMO systems. Current solutions to this problem are mainly based on special preamble designs, where different training sequences are cascaded and then separately used to assist timing synchronization and CFO estimation. Such preamble designs not only increase system overhead but also burden the receivers with independent algorithms for timing synchronization and CFO estimation. In this paper, we propose a low-overhead (compact) preamble having the same length as one OFDM symbol, along with a unified algorithm for both timing synchronization and CFO estimation. Furthermore, the CFO estimation range can be flexibly extended to cope with larger CFOs in the proposed approach. Under the same training overhead and power consumption, simulation results indicate that the proposed approach outperforms a timing synchronization scheme that based on unequal period synchronization patterns.
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    Appears in Collections:[Department of Electrical Engineering] EE Conference Papers
    [Institute of Communications Engineering] COM Conference Papers
    [Computer and Communication Research Center ] CCRC Conference Papers

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