IEIE Transactions on Smart Processing and Computing

The Institute of Electronics and Information Engineers (대한전자공학회)
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Modified MMSE Estimator based on Non-Linearly Spaced Pilots for OFDM Systems

  • Khan, Latif Ullah (Department of Electrical Engineering, University of Engineering & Technology)
  • Received : 2013.10.20
  • Accepted : 2013.11.15
  • Published : 2014.02.28
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Abstract

This paper proposes a Modified Minimum Mean Square Error (M-MMSE) estimator for an Orthogonal Frequency Division Multiplexing (OFDM) System over fast fading Rayleigh channel. The proposed M-MMSE estimator considered the effects of the efficient placement of pilots based on the channel energy distribution. The pilot symbols were placed in a non-linear manner according to the density of the channel energy. Comparative analysis of the MMSE estimator for a comb-type pilot arrangement and M-MMSE estimator for the proposed pilot insertion scheme revealed significant performance improvement of the M-MMSE estimator over the MMSE estimator.

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References

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