Analysis of Intercarrier Interference Cancellation Scheme in OFDM Systems

Elessaid Sulaiman Saad, Naser Salaheldin Elmisbah

Abstract


Orthogonal Frequency Division Multiplexing (OFDM) is an emerging multi-carrier modulation
scheme, which has been adopted for several wireless standards such as IEEE 802.11a and
HiperLAN2. In OFDM systems, the performance is very sensitive to subcarrier frequency errors
(offset). This paper shows the analysis and derivations of intercarrier interference (ICI) complex
gain that issued in self-cancellation scheme and its dependence on subcarrier frequency offset.
Simulation shows that better improvement in performance is achieved for systems that use this
cancellation scheme. Moreover, analysis and simulation show that theoretical carrier-tointerference
ratio (CIR) for OFDM with cancellation scheme is greater than conventional one by
more than 14dB.

Keywords


Orthogonal Frequency Division Multiplexing (OFDM); intercarrier interference (ICI), Relative frequency offset; and ICI complex gain.

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References


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