Inter-Carrier Interference Analysis of OFDM Systems Communicating Over Rapidly-Fading Nakagami-m Channels
Inter-Carrier Interference Analysis of OFDM Systems Communicating Over Rapidly-Fading Nakagami-m Channels
In this contribution, the Bit Error Rate (BER) performance of OFDM systems using coherent demodulation over time-variant flat Nakagami-m fading channels is analyzed. In a rapidly fading environment the orthogonality of the OFDM subcarrier signals may be destroyed and this phenomenon potentially results in InterCarrier Interference (ICI). The novel contribution of the paper is that the desired signal is shown to be accurately modelled as a function of the sum of two correlated Nakagamim variables, provided that the Doppler shift is moderate. It is also shown that the ICI can be modelled as a function of the difference of two correlated Nakagami-m variables. Finally, it is demonstrated that the assumption of having a near-Gaussian ICI distribution is inaccurate, hence leading to an inaccurate BER estimate, which is associated with a pessimistically high BER-floor.
79-83
Zhang, J.M
6e646acf-fb04-49df-92c9-5cd8f10f2afa
Yang, L-L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Liu, X.
878efcac-76c6-4ca0-8f4a-425f1e9abdac
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
2006
Zhang, J.M
6e646acf-fb04-49df-92c9-5cd8f10f2afa
Yang, L-L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Liu, X.
878efcac-76c6-4ca0-8f4a-425f1e9abdac
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Zhang, J.M, Yang, L-L., Liu, X. and Hanzo, L.
(2006)
Inter-Carrier Interference Analysis of OFDM Systems Communicating Over Rapidly-Fading Nakagami-m Channels.
IEEE ISSSTA '06, Manaus, Amazon, Brazil.
28 - 31 Aug 2006.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
In this contribution, the Bit Error Rate (BER) performance of OFDM systems using coherent demodulation over time-variant flat Nakagami-m fading channels is analyzed. In a rapidly fading environment the orthogonality of the OFDM subcarrier signals may be destroyed and this phenomenon potentially results in InterCarrier Interference (ICI). The novel contribution of the paper is that the desired signal is shown to be accurately modelled as a function of the sum of two correlated Nakagamim variables, provided that the Doppler shift is moderate. It is also shown that the ICI can be modelled as a function of the difference of two correlated Nakagami-m variables. Finally, it is demonstrated that the assumption of having a near-Gaussian ICI distribution is inaccurate, hence leading to an inaccurate BER estimate, which is associated with a pessimistically high BER-floor.
More information
Published date: 2006
Additional Information:
Event Dates: 28-31 August 2006
Venue - Dates:
IEEE ISSSTA '06, Manaus, Amazon, Brazil, 2006-08-28 - 2006-08-31
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 262972
URI: http://eprints.soton.ac.uk/id/eprint/262972
PURE UUID: 38c29427-19fc-4c64-81e2-92fa5aa68892
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Date deposited: 18 Sep 2006
Last modified: 18 Mar 2024 02:49
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Contributors
Author:
J.M Zhang
Author:
L-L. Yang
Author:
X. Liu
Author:
L. Hanzo
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