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    Displacement MIMO Kalman equalizer architecture for CDMA downlink in fast fading channels

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    Author
    Guo, Yuanbin; Zhang, Jianzhong (Charlie); McCain, Dennis; Cavallaro, Joseph R.
    Date
    2005-07-01
    Abstract
    In this paper, we explore the displacement structure in a Kalman equalizer for MIMO-CDMA downlink. A streamlined MIMO Kalman equalizer architecture is proposed to extract the commonality in the data path by exploiting the displacement structure of the transition matrix and the block-Toeplitz structure of the channel matrix. Numerical matrix multiplications with O(F^3) complexity are eliminated by simple data loading process. Utilizing the block Toeplitz structure of the channel matrix, an FFT-based acceleration is proposed to avoid direct matrix multiplications in the time domain. Finally, an iterative Conjugate-Gradient based algorithm is proposed to avoid the inversion of the innovation correlation matrix in Kalman gain calculation. The proposed architecture not only reduces the numerical complexity to O(F log2 F) per chip, but also facilitates the parallel and pipelined VLSI implementation for real-time processing.
    Description
    Journal Paper
    Citation
    Y. Guo, J. (. Zhang, D. McCain and J. R. Cavallaro, "Displacement MIMO Kalman equalizer architecture for CDMA downlink in fast fading channels," IEEE Transactions on Wireless Communications, 2005.
    Published Version
    http://dx.doi.org/10.1109/GLOCOM.2005.1578070
    Keyword
    MIMO; Kalman filter; displacement structure; FFT; Conjugate Gradient.; More... MIMO; Kalman filter; displacement structure; FFT; Conjugate Gradient. Less...
    Type
    Journal article
    Citable link to this page
    https://hdl.handle.net/1911/19932
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    • ECE Publications [1468]
    • Rice Wireless [268]

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    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
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    Site Map