Low complexity channel estimation for space-time coded wideband OFDM systems

Yi Gong; Khaled Ben Letaief

doi:10.1109/TWC.2003.816797

Low complexity channel estimation for space-time coded wideband OFDM systems

Yi Gong^*, Khaled Ben Letaief

^*Corresponding author for this work

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Research output: Contribution to journal › Journal Article › peer-review

71 Citations (Scopus)

Abstract

In this letter, channel estimation for space-time coded orthogonal-frequency division multiplexing (OFDM) systems is considered. By assuming that the channel frequency response is quasi-static over two consecutive OFDM symbols, we develop channel parameter estimators based on the use of space-time block coded (STBC) training blocks. Using an STBC training pattern, a low-rank Wiener filter-based channel estimator with a significant complexity reduction is proposed. A simplified approach for the optimal low-rank estimator is also proposed to further reduce the estimator complexity while retaining an accurate frequency domain channel estimation. Numerical results are provided to demonstrate the performance of the proposed low complexity channel estimators for space-time trellis coded OFDM systems.

Original language	English
Pages (from-to)	876-882
Number of pages	7
Journal	IEEE Transactions on Wireless Communications
Volume	2
Issue number	5
DOIs	https://doi.org/10.1109/TWC.2003.816797
Publication status	Published - Sept 2003

Keywords

Channel estimation
Orthogonal-frequency division multiplexing (OFDM)
Space-time (ST) coding
Space-time block coding
Wireless communications

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10.1109/TWC.2003.816797

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title = "Low complexity channel estimation for space-time coded wideband OFDM systems",

abstract = "In this letter, channel estimation for space-time coded orthogonal-frequency division multiplexing (OFDM) systems is considered. By assuming that the channel frequency response is quasi-static over two consecutive OFDM symbols, we develop channel parameter estimators based on the use of space-time block coded (STBC) training blocks. Using an STBC training pattern, a low-rank Wiener filter-based channel estimator with a significant complexity reduction is proposed. A simplified approach for the optimal low-rank estimator is also proposed to further reduce the estimator complexity while retaining an accurate frequency domain channel estimation. Numerical results are provided to demonstrate the performance of the proposed low complexity channel estimators for space-time trellis coded OFDM systems.",

keywords = "Channel estimation, Orthogonal-frequency division multiplexing (OFDM), Space-time (ST) coding, Space-time block coding, Wireless communications",

author = "Yi Gong and Letaief, \{Khaled Ben\}",

year = "2003",

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doi = "10.1109/TWC.2003.816797",

language = "English",

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pages = "876--882",

journal = "IEEE Transactions on Wireless Communications",

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T1 - Low complexity channel estimation for space-time coded wideband OFDM systems

AU - Gong, Yi

AU - Letaief, Khaled Ben

PY - 2003/9

Y1 - 2003/9

N2 - In this letter, channel estimation for space-time coded orthogonal-frequency division multiplexing (OFDM) systems is considered. By assuming that the channel frequency response is quasi-static over two consecutive OFDM symbols, we develop channel parameter estimators based on the use of space-time block coded (STBC) training blocks. Using an STBC training pattern, a low-rank Wiener filter-based channel estimator with a significant complexity reduction is proposed. A simplified approach for the optimal low-rank estimator is also proposed to further reduce the estimator complexity while retaining an accurate frequency domain channel estimation. Numerical results are provided to demonstrate the performance of the proposed low complexity channel estimators for space-time trellis coded OFDM systems.

AB - In this letter, channel estimation for space-time coded orthogonal-frequency division multiplexing (OFDM) systems is considered. By assuming that the channel frequency response is quasi-static over two consecutive OFDM symbols, we develop channel parameter estimators based on the use of space-time block coded (STBC) training blocks. Using an STBC training pattern, a low-rank Wiener filter-based channel estimator with a significant complexity reduction is proposed. A simplified approach for the optimal low-rank estimator is also proposed to further reduce the estimator complexity while retaining an accurate frequency domain channel estimation. Numerical results are provided to demonstrate the performance of the proposed low complexity channel estimators for space-time trellis coded OFDM systems.

KW - Channel estimation

KW - Orthogonal-frequency division multiplexing (OFDM)

KW - Space-time (ST) coding

KW - Space-time block coding

KW - Wireless communications

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U2 - 10.1109/TWC.2003.816797

DO - 10.1109/TWC.2003.816797

M3 - Journal Article

SN - 1536-1276

VL - 2

SP - 876

EP - 882

JO - IEEE Transactions on Wireless Communications

JF - IEEE Transactions on Wireless Communications

IS - 5

ER -

Low complexity channel estimation for space-time coded wideband OFDM systems

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