A superimposed periodic pilot scheme for semi-blind channel estimation of OFDM systems

@article{Chen2002ASP,
  title={A superimposed periodic pilot scheme for semi-blind channel estimation of OFDM systems},
  author={Ning Chen and Guotong Zhou},
  journal={Proceedings of 2002 IEEE 10th Digital Signal Processing Workshop, 2002 and the 2nd Signal Processing Education Workshop.},
  year={2002},
  pages={362-365}
}
  • N. Chen, Guotong Zhou
  • Published 13 October 2002
  • Business
  • Proceedings of 2002 IEEE 10th Digital Signal Processing Workshop, 2002 and the 2nd Signal Processing Education Workshop.
An attractive feature of the Orthogonal Frequency Division Multiplexing (OFDM) system is its simple one-tap equalizer for linear channel distortions. Nevertheless, one still has to address the channel estimation issue. In mobile environments, self-recovery methods that avoid any recurring training overhead are of interest. In this paper, we propose a superimposed pilot scheme employing only a first-order statistic to identify the channel for OFDM systenis. It can be regarded as a semi-blind… 

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References

SHOWING 1-8 OF 8 REFERENCES
Added pilot semi-blind channel estimation scheme for OFDM in fading channels
TLDR
An added pilot semi-blind (APSB) scheme used for channel identification of OFDM systems, which have been adopted for DAB and DVB-T, is proposed and is found to compare favorably to existing blind schemes proposed for the OFDM system in terms of bit error rate and convergence.
Superimposed periodic pilots for blind channel estimation
  • G. Tong Zhou, M. Viberg, T. McKelvey
  • Computer Science
    Conference Record of Thirty-Fifth Asilomar Conference on Signals, Systems and Computers (Cat.No.01CH37256)
  • 2001
TLDR
This work proposes here a simple, alternative scheme which employs only a first-order statistic for blind channel estimation and derives the variance expression of the linear channel estimate and compares with the Cramer-Rao Bound (CRB).
Performance of multiresolution OFDM on frequency-selective fading channels
TLDR
Several multiresolution modulation (MRM) schemes with orthogonal frequency division multiplexing (OFDM) are examined, where a concatenated coding scheme is employed to provide the required performance levels.
Pilot patterns for channel estimation in OFDM
In orthogonal frequency division multiplexing, OFDM, pilot-symbol distribution can be viewed as a 2D sampling problem related to the channel frequency response. Current pilot patterns with a common
A comparative study of pilot-based channel estimators for wireless OFDM
This report deals with pilot-based channel estimation in wireless OFDM systems. We assume that the receiver is able to use all transmitted pilots, which is the case in broadcasting and in the
Stiiber, “Performance of multiresolution OFDM on frequency-selective fading channels,’
  • IEEE Trans. Veh. Techno/.,
  • 1999
Principles of mobile communication