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. In, IEEE ISSSTA '06, Manaus, Amazon, Brazil, 28 - 31 Aug 2006. , 79-83.

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Description/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.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Event Dates: 28-31 August 2006
Divisions: Faculty of Physical Sciences and Engineering > Electronics and Computer Science > Comms, Signal Processing & Control
ePrint ID: 262972
Date Deposited: 18 Sep 2006
Last Modified: 27 Mar 2014 20:06
Further Information:Google Scholar
ISI Citation Count:0
URI: http://eprints.soton.ac.uk/id/eprint/262972

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