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dc.contributor.authorGuo, Yuanbin
McCain, Dennis
Cavallaro, Joseph R.
dc.creatorGuo, Yuanbin
McCain, Dennis
Cavallaro, Joseph R.
dc.date.accessioned 2007-10-31T00:46:06Z
dc.date.available 2007-10-31T00:46:06Z
dc.date.issued 2005-07-01
dc.date.submitted 2006-02-06
dc.identifier.urihttps://hdl.handle.net/1911/19933
dc.description Journal Paper
dc.description.abstract In this paper, we propose a class of novel structured linear MMSE chip equalizer architectures for the MIMO CDMA systems using FFT-accelerations. First, a Conjugate Gradient (CG) algorithm is applied to avoid the Direct Matrix Inverse (DMI), which has O((NF)^3) complexity. By utilizing a revered form block-Toeplitz structure, the matrix multiplication in the CG iteration is accelerated by an equivalent frequencydomain FFT-based â overlap-saveâ architecture. The iteration rapidly refines a crude initial approximation to the actual final equalizer taps and significantly reduces complexity from O((NF)^2) to O(NF log2(F)). Secondly, we propose a circulant architecture which also utilizes FFT-based acceleration by approximating the DMI with a block-circulant structure. An extensive comparative analysis in performance, numerical stability and complexity demonstrates promising performance/complexity tradeoff, especially for very long channels. Both algorithms not only reduce the complexity dramatically, but also provide unified parallel and pipelined structures, which is essential for practical real-time VLSI implementation of MIMO systems.
dc.language.iso eng
dc.subjectCDMA
MIMO
LMMSE equalizer
real-time implementation
iterative
Conjugate Gradient
circulant.
dc.title Structured Iterative and Circulant MIMO Chip Equalizer Architectures with FFT-acceleration for CDMA Systems
dc.type Journal article
dc.citation.bibtexName article
dc.citation.journalTitle IEEE Transaction on Vehicular Technology
dc.date.modified 2006-02-06
dc.contributor.orgCenter for Multimedia Communications (http://cmc.rice.edu/)
dc.subject.keywordCDMA
MIMO
LMMSE equalizer
real-time implementation
iterative
Conjugate Gradient
circulant.
dc.type.dcmi Text
dc.type.dcmi Text
dc.identifier.citation Y. Guo, D. McCain and J. R. Cavallaro, "Structured Iterative and Circulant MIMO Chip Equalizer Architectures with FFT-acceleration for CDMA Systems," IEEE Transaction on Vehicular Technology, 2005.


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  • ECE Publications [1321]
    Publications by Rice University Electrical and Computer Engineering faculty and graduate students
  • Rice Wireless [268]
    Publications by Rice Faculty and graduate students in the Rice Wireless group

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