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Title:
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Efficient MIMO equalization for downlink multi-code CDMA: complexity optimization and comparative study |
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Author:
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Guo, Yuanbin; Zhang, Jianzhong (Charlie); McCain, Dennis; Cavallaro, Joseph R.
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Type:
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Conference paper |
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xmlui.Rice_ECE.Keywords:
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MIMO equalizer; Multi-code CDMA; complexity |
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Citation:
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Y. Guo, J. (. Zhang, D. McCain and J. R. Cavallaro, "Efficient MIMO equalization for downlink multi-code CDMA: complexity optimization and comparative study," vol. 4, no. 7, pp. 2513 - 2519, 2004. |
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Abstract:
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In this paper, we present an efficient LMMSE chip equalizer to suppress the interference caused by the multipath fading channel in the MIMO multi-code CDMA downlink. The block-Toeplitz structure in the correlation matrix is approximated with a block circulant matrix. An FFT-based algorithm is applied to avoid the Direct-Matrix-Inverse (DMI) in the system equation. Hermitian optimization is proposed to further reduce the complexity. A comparative study in both performance and complexity with the Conjugate-Gradient (CG) algorithm is then presented. The simulation shows very promising results for the FFT-based equalizer compared with both the DMI and CG algorithms. |
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Date Published:
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2004-11-01 |
