Adaptive Variable Step-Size Griffiths' Algorithm for Blind Demodulation of DS/CDMA Signals

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概要

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• The minimum mean-squared error (MMSE) linear detector [1],[2] has been proposed to successfully suppress the multiple access interference and mitigate the near-far problem in direct-sequence code-division multiple access communication systems. In the presence of unknown or time-varying channel parameters, the MMSE linear detector can be implemented by the blind Griffiths' algorithm [3], which uses the desired signal vectorinstead of a training sequence of symbols for initial adaptation. In this paper, a variable step-size (VSS) Criffiths' algorithm is proposed for accelerating the convergence speed, especially in the presence of strong interference. Numerical results show that the convergence properties of the VSS Griffiths' algorithm are robust against the wide eigenvalue-spread problem of the correlation matrix associated with the received signal vector compared to the Griffiths' algorithm using a fixed step-size.

• 社団法人電子情報通信学会の論文
• 1999-10-25

著者

• Wei C‐h

  National Chiao Tung Univ. Hsinchu Twn

• HWANG Ho-Chi

  Department of Electronics Engineering, National Chiao Tung University

• WEI Che-Ho

  Department of Electronics Engineering, National Chiao Tung University

• Wei Che-ho

  Department Of Electronics Engineering National Chiao Tung University

• Hwang Ho-chi

  Department Of Electronics Engineering National Chiao Tung University

関連論文

• Adaptive Variable Step-Size Griffiths' Algorithm for Blind Demodulation of DS/CDMA Signals
• Precursor ISI-Free Frame Synchronization for DMT VDSL System(Special Issue on Outstanding Papers from APCC 2001)
• A High-Throughput VLSI Architecture for LZFG Data Compression

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