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    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/13163


    Title: Partial cached-FFT algorithm for OFDMA communications
    Authors: Chao-Ming Chen
    Yuan-Hao Huang
    教師: 黃元豪
    Date: 2007
    Publisher: Institute of Electrical and Electronics Engineers Inc.
    Relation: TENCON 2007 - 2007 IEEE Region 10 Conference
    Oct. 30 2007-Nov. 2 2007 Page(s):1 - 4
    Keywords: orthogonal frequency division multiplexing
    FFT
    OFDM
    OFDMA
    Abstract: Orthogonal frequency division multiplexing (OFDM) transmission has become a popular technique for modern wired and wireless communications. Next-generation mobile communication systems also plan to adopt orthogonal frequency division multiple access (OFDMA) technology for multi-user scenario, in which subcarriers can be grouped as resource blocks or subchannels and allocated to different users. Hence, only partial subcarriers in one OFDM symbol may be used by one user end (UE). In this situation, more (a) Partial FFT algorithm (b) Cached-FFT algorithm redundant power consumption is produced by the complete FFT computation for OFDM demodulation in the UE. Among the available FFT architectures, cached-FFT has much regularity and lower power consumption than others. Thus, a partial FFT algorithm can be applied to the cached-FFT architecture for power reduction of OFDMA UE. In this paper, a partial cached-FFT algorithm is proposed to control the operation of the cached-FFT processor for different proposals of OFDMA resource block allocation schemes, thereby reducing the computing power.
    Relation Link: http://ieeexplore.ieee.org/Xplore/dynhome.jsp
    URI: http://nthur.lib.nthu.edu.tw/handle/987654321/13163
    Appears in Collections:[電腦與通訊科技研發中心] 技術報告
    [通訊工程研究所] 會議論文
    [積體電路設計技術研發中心] 會議論文

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