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A comparative study of pilot-based channel estimators for wireless OFDM

Sandell, Magnus and Edfors, Ove LU (1996) In Div. of Signal Processing, Research Report TULEA 1996:19.
Abstract
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 downlink of a multiuser system. Four estimators (of which two have been proposed in the literature) are compared, both in terms of mean-squared error and bit-error rates. In the latter case, we simulate a multiuser system which incorporates channel coding. The channel estimation is a two-dimensional problem (time and frequency), and both separable and non-separable estimators are investigated. We design low-rank approximations of these estimators, and compare the performance at given complexities. The comparison shows that the use of separable... (More)
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 downlink of a multiuser system. Four estimators (of which two have been proposed in the literature) are compared, both in terms of mean-squared error and bit-error rates. In the latter case, we simulate a multiuser system which incorporates channel coding. The channel estimation is a two-dimensional problem (time and frequency), and both separable and non-separable estimators are investigated. We design low-rank approximations of these estimators, and compare the performance at given complexities. The comparison shows that the use of separable estimators increases the performance substantially, compared to non-separable estimators with the same complexity. For the scenario investigated in this report the performance is further improved by applying low-rank approximations to separable estimators. (Less)
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author
publishing date
type
Book/Report
publication status
published
subject
in
Div. of Signal Processing, Research Report
volume
TULEA 1996:19
pages
34 pages
publisher
LuleƄ University of Technology
language
English
LU publication?
no
id
f19fbf5a-fc90-4de5-8d56-235069a8b193 (old id 1043840)
alternative location
http://www.sm.luth.se/csee/sp/research/report/sae96r.pdf
date added to LUP
2008-03-10 14:01:37
date last changed
2016-06-29 08:58:16
@misc{f19fbf5a-fc90-4de5-8d56-235069a8b193,
  abstract     = {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 downlink of a multiuser system. Four estimators (of which two have been proposed in the literature) are compared, both in terms of mean-squared error and bit-error rates. In the latter case, we simulate a multiuser system which incorporates channel coding. The channel estimation is a two-dimensional problem (time and frequency), and both separable and non-separable estimators are investigated. We design low-rank approximations of these estimators, and compare the performance at given complexities. The comparison shows that the use of separable estimators increases the performance substantially, compared to non-separable estimators with the same complexity. For the scenario investigated in this report the performance is further improved by applying low-rank approximations to separable estimators.},
  author       = {Sandell, Magnus and Edfors, Ove},
  language     = {eng},
  pages        = {34},
  publisher    = {ARRAY(0x9abd7b0)},
  series       = {Div. of Signal Processing, Research Report},
  title        = {A comparative study of pilot-based channel estimators for wireless OFDM},
  volume       = {TULEA 1996:19},
  year         = {1996},
}