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Second-Order Channel Parameter Estimation Assisted Cancellation of Channel Variation-Induced Inter-Subcarrier Interference in OFDM Systems

Second-Order Channel Parameter Estimation Assisted Cancellation of Channel Variation-Induced Inter-Subcarrier Interference in OFDM Systems
Second-Order Channel Parameter Estimation Assisted Cancellation of Channel Variation-Induced Inter-Subcarrier Interference in OFDM Systems
OFDM transmission is known to be sensitive against carrier frequency offsets, as well as against the channel impulse response (CIR) variations incurred during an OFDM symbol period. Both of these phenomena lead to inter-subcarrier interference (ICI). Here we will concentrate on the latter phenomenon. ICI can be considered as an additional noise contribution, which linearly depends on the signal power and thus it potentially limits the achievable BER at relatively high SNRs. In this contribution we propose a second-order time-domain CIR tap variation estimator, which relies on both the received signal as well as on tentative symbol decisions. Our simulation results obtained in the context of a system employing decision-directed channel-prediction demonstrate that with the aid of the proposed algorithm, ICI cancellation can be performed even in high Doppler frequency channel scenarios. This is achieved without inserting additional time-domain pilot symbols.
1-5
Münster, M.
c7bbba92-827f-4a77-bdc2-fbed67caab36
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Münster, M.
c7bbba92-827f-4a77-bdc2-fbed67caab36
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Münster, M. and Hanzo, L. (2001) Second-Order Channel Parameter Estimation Assisted Cancellation of Channel Variation-Induced Inter-Subcarrier Interference in OFDM Systems. EUROCON, Bratislava, Slovakia. 04 - 07 Jul 2001. pp. 1-5 .

Record type: Conference or Workshop Item (Paper)

Abstract

OFDM transmission is known to be sensitive against carrier frequency offsets, as well as against the channel impulse response (CIR) variations incurred during an OFDM symbol period. Both of these phenomena lead to inter-subcarrier interference (ICI). Here we will concentrate on the latter phenomenon. ICI can be considered as an additional noise contribution, which linearly depends on the signal power and thus it potentially limits the achievable BER at relatively high SNRs. In this contribution we propose a second-order time-domain CIR tap variation estimator, which relies on both the received signal as well as on tentative symbol decisions. Our simulation results obtained in the context of a system employing decision-directed channel-prediction demonstrate that with the aid of the proposed algorithm, ICI cancellation can be performed even in high Doppler frequency channel scenarios. This is achieved without inserting additional time-domain pilot symbols.

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More information

Published date: July 2001
Additional Information: Event Dates: 4-7 July 2001 Organisation: EUROCON Address: Bratislava, Slovakia
Venue - Dates: EUROCON, Bratislava, Slovakia, 2001-07-04 - 2001-07-07
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 257063
URI: http://eprints.soton.ac.uk/id/eprint/257063
PURE UUID: 1802d2c5-12da-42c2-afe4-ff651543fedd
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 06 Jan 2004
Last modified: 18 Mar 2024 02:33

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Contributors

Author: M. Münster
Author: L. Hanzo ORCID iD

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