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Inter-Carrier Interference Analysis of OFDM Systems Communicating Over Rapidly-Fading Nakagami-m Channels

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 At IEEE ISSSTA '06, Brazil. 28 - 31 Aug 2006. , pp. 79-83.

Record type: Conference or Workshop Item (Paper)


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.

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Published date: 2006
Additional Information: Event Dates: 28-31 August 2006
Venue - Dates: IEEE ISSSTA '06, Brazil, 2006-08-28 - 2006-08-31
Organisations: Southampton Wireless Group


Local EPrints ID: 262972
PURE UUID: 38c29427-19fc-4c64-81e2-92fa5aa68892
ORCID for L-L. Yang: ORCID iD

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Date deposited: 18 Sep 2006
Last modified: 18 Jul 2017 08:46

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Author: J.M Zhang
Author: L-L. Yang ORCID iD
Author: X. Liu
Author: L. Hanzo

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