National Tsing Hua University Institutional Repository:A compact preamble design for synchronization in distributed MIMO OFDM systems
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    National Tsing Hua University Institutional Repository > 電機資訊學院 > 電機工程學系 > 會議論文  >  A compact preamble design for synchronization in distributed MIMO OFDM systems


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    题名: A compact preamble design for synchronization in distributed MIMO OFDM systems
    作者: Hung-Chin Wang;Chin-Liang Wang
    教師: 王晉良
    日期: 2011
    出版者: Institute of Electrical and Electronics Engineers
    關聯: Proceedings of the 2011 IEEE Vehicular Technology Conference - Fall (VTC 2011-Fall), San Francisco, CA, SEP 05-08, 2011, Pages 1 - 4
    关键词: cooperative communications
    multiple input multiple output (MIMO)
    distributed MIMO
    orthogonal frequency division multiplexing (OFDM)
    preamble
    synchronization
    摘要: 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.
    相関连結: http://www.ieee.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83661
    显示于类别:[電機工程學系] 會議論文
    [通訊工程研究所] 會議論文
    [電腦與通訊科技研發中心] 會議論文

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