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Volume 26 Issue 2
Feb.  2004
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Zeng Zhao-hua, Liu Gui-zhong. Adaptive Matched Demodulation Algorithm Based on LMS with Variable Step Size[J]. Journal of Electronics & Information Technology, 2004, 26(2): 241-247.
Citation: Zeng Zhao-hua, Liu Gui-zhong. Adaptive Matched Demodulation Algorithm Based on LMS with Variable Step Size[J]. Journal of Electronics & Information Technology, 2004, 26(2): 241-247.

Adaptive Matched Demodulation Algorithm Based on LMS with Variable Step Size

  • Received Date: 2002-07-11
  • Rev Recd Date: 2002-10-29
  • Publish Date: 2004-02-19
  • Based on Minimum-Mean-Square-Error(MMSE) criterion, a kind of LMS algorithm with variable step size is proposed to suppress Multi-Access Interference (MAI) in asynchronous DS-CDMA system. Compare with similar variable step size LMS algorithm, computer simulation results show that the kind of detector is insensitive to the near-far effect and its structure is very simple. At the same time, it has lower bit error rate and faster speed of convergence and tracking without increasing computational complexity. In particular, the controlling parameters of proposed algorithm are not required to re-adjust, even if the channel parameter changes. So it can be widely used.
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