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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  >  An improved constellation extension scheme for PAPR reduction in OFDM systems

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83666

    Title: An improved constellation extension scheme for PAPR reduction in OFDM systems
    Authors: Chin-Liang Wang;Shun-Sheng Wang;Yi-Ching Huang
    教師: 王晉良
    Date: 2011
    Publisher: Institute of Electrical and Electronics Engineers
    Relation: Proceedings of the 2011 IEEE Vehicular Technology Conference - Spring (VTC 2011-Spring), Budapest, Hungary, MAY 15-18, 2011, Pages 1 - 4
    Keywords: PAPR
    Abstract: A number of peak-to-average power ratio (PAPR) reduction techniques have been proposed for orthogonal frequency division multiplexing (OFDM) systems; however, most of them require transmitting side information and thus reduce the bandwidth efficiency. The existing constellation extension (CE) schemes do not need to transmit side information. In this paper, we propose an improved CE scheme for PAPR reduction of OFDM signals with 16-QAM modulation. The proposed CE scheme has four extendable constellation points, the four corners in the 16-QAM constellation, and each extendable constellation point has two possible extended constellation points. The proposed CE scheme, when compared with previous related CE schemes, has fewer extendable constellation points and more corresponding extended constellation points, resulting in better BER performance with almost the same PAPR reduction. Computer simulations are given to demonstrate the effectiveness of the proposed scheme.
    Relation Link: http://www.ieee.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83666
    Appears in Collections:[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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