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    National Tsing Hua University Institutional Repository > 電機資訊學院 > 電機工程學系 > 期刊論文 >  Low Complexity MIMO Precoder Design with LDL Channel Decomposition


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83471


    Title: Low Complexity MIMO Precoder Design with LDL Channel Decomposition
    Authors: Che-Chen Chou;Jen-Ming Wu
    教師: 吳仁銘
    Date: 2011
    Publisher: Institute of Electrical and Electronics Engineers
    Relation: IEEE Transactions on Vehicular Technology, Institute of Electrical and Electronics Engineers, Volume 60, Issue 5, Jun 2011, Pages 2368 - 2372
    Keywords: MIMO
    LDL
    Abstract: We present a new multiple-input-multiple-output (MIMO) precoding scheme using LDLH channel decomposition. The proposed method is verified to have lower complexity and better bit-error-rate (BER) performance than that of conventional singular-value decomposition (SVD). SVD is commonly used to decompose the MIMO channel into parallel eigenmodes. However, the large variation of the singular values often leads to ill-conditioned channel and degraded error performance. Recently, two SVD-based decomposition schemes that aim to improve such subchannel gain uniformity have been developed. They are geometric mean decomposition (GMD) and uniform channel decomposition (UCD). Albeit the error performance of GMD and UCD is optimized, both of them require relatively higher complexity than that of SVD with power allocation. In this paper, we present a scheme with moderate subchannel gain uniformity while exhibiting the lowest complexity compared with that of SVD, GMD, and UCD. Simulations also show that LDLH can outperform all aforementioned schemes as the channel-estimation errors in the receiver become severe.
    Relation Link: http://www.ieee.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83471
    Appears in Collections:[電機工程學系] 期刊論文
    [積體電路設計技術研發中心] 期刊論文
    [通訊工程研究所] 期刊論文

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