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Journal from gdlhub / 2020-01-09 09:04:33
Oleh : Sakina Atoui, Noureddine Doghmane, Saddek Afifi, Telkomnika
Dibuat : 2020-01-09, dengan 1 file

Keyword : AWGN channel, carrier frequency offset (CFO), inter-carriers’ interference (ICI), orthogonal frequency division multiplexing (OFDM), Rayleigh fading channel
Url : http://journal.uad.ac.id/index.php/TELKOMNIKA/issue/view/640
Sumber pengambilan dokumen : web

Orthogonal Frequency Division Multiplexing (OFDM) is of great interest for the development of

the fifth-generation technology. It is the cornerstone of Multiple-input multiple-output (MIMO) systems.

Even though inter carrier interference (ICI) and inter symbol interference (ISI) have been processed for

the fourth-generation standards, they still present a huge problem for the fifth-generation standards. This

paper explores the tradeoff between the length of the cyclic prefix and the performances of the OFDM

system. It also studies the effect of carrier frequency offset (CFO) on OFDM systems. A blind frequency

offset estimator that uses the correlations between the remodulated sequence in the receiver side and

the conventional received symbol is presented and a closed form solution is derived. The proposed

estimator is derived under short interval when the correlation is high, so it has low computational

complexity. Lin and Beek’s estimators are used for comparison. Simulations demonstrate the effectiveness

of the proposed estimator under Rayleigh fading channel.

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