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Analysis of DFT-based channel estimators for OFDM

Edfors, Ove LU ; Sandell, Magnus ; van de Beek, Jan-Jaap ; Wilson, Sarah Kate and Börjesson, Per Ola LU (2000) In Wireless Personal Communications 12(1). p.55-70
Abstract
In this paper we analyze the performance of three low-complexity channel estimators, based on the discrete Fourier transform (DFT), for orthogonal frequency-division multiplexing (OFDM) systems. Estimators of this type have been analyzed for discrete-time channels, and we extend this analysis to continuous-time channels. We present analytical expressions for their mean-squared error (MSE) and evaluate their complexity vs. symbol-error rate (SER) for 16-QAM. The analysis shows that this type of estimators may experience an irreducible error floor at high SNRs. However, in one of the three estimators the error floor can be eliminated while the complexity stays low and the performance is maximized.
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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Wireless Personal Communications
volume
12
issue
1
pages
55 - 70
publisher
Springer
external identifiers
  • scopus:0033891986
ISSN
1572-834X
DOI
10.1023/A:1008864109605
language
English
LU publication?
yes
id
c98cc578-2410-4adc-8c2f-aff5d7b8a9a7 (old id 1035968)
date added to LUP
2016-04-01 15:25:36
date last changed
2024-02-09 09:03:56
@article{c98cc578-2410-4adc-8c2f-aff5d7b8a9a7,
  abstract     = {{In this paper we analyze the performance of three low-complexity channel estimators, based on the discrete Fourier transform (DFT), for orthogonal frequency-division multiplexing (OFDM) systems. Estimators of this type have been analyzed for discrete-time channels, and we extend this analysis to continuous-time channels. We present analytical expressions for their mean-squared error (MSE) and evaluate their complexity vs. symbol-error rate (SER) for 16-QAM. The analysis shows that this type of estimators may experience an irreducible error floor at high SNRs. However, in one of the three estimators the error floor can be eliminated while the complexity stays low and the performance is maximized.}},
  author       = {{Edfors, Ove and Sandell, Magnus and van de Beek, Jan-Jaap and Wilson, Sarah Kate and Börjesson, Per Ola}},
  issn         = {{1572-834X}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{55--70}},
  publisher    = {{Springer}},
  series       = {{Wireless Personal Communications}},
  title        = {{Analysis of DFT-based channel estimators for OFDM}},
  url          = {{http://dx.doi.org/10.1023/A:1008864109605}},
  doi          = {{10.1023/A:1008864109605}},
  volume       = {{12}},
  year         = {{2000}},
}