Wiener-based ICI cancellation schemes for OFDM systems over fading channels

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Title:	Wiener-based ICI cancellation schemes for OFDM systems over fading channels
Authors:	Wen, J.-H.;Yao, Y.-C.;Kuo, Y.-C.
Contributors:	Department of Electrical Engineering, Tunghai University
Keywords:	Fading channels;Intercarrier interference (ICI);Orthogonal frequency division multiplexing (OFDM);Successive interference cancellation (SIC);Wiener-based
Date:	2013
Issue Date:	2014-05-30T03:12:32Z (UTC)
Abstract:	The subcarriers of orthogonal frequency division multiplexing (OFDM) systems may fail to keep orthogonal to each other under time-varying channels. The loss of orthogonality among the subcarriers will degrade the system performace, and this effect is named intercarrier interference (ICI). In this paper, a Wiener-based successive interference cancellation (SIC) scheme is proposed to detect the OFDM signals. It provides good ICI cancellation performance; however, it suffers large computation complexity. Therefore, a modified Wiener-based SIC scheme is further proposed to reduce the computation complexity. Simulation results show the performance of the Wiener-based SIC scheme is better than those of zero forcing, zero forcing plus SIC and original Wiener-based schemes. Furthermore, with the modified Wiener-based SIC scheme, the performance is still better than the others. Although the performace of the modified Wiener-based SIC scheme suffers little degradation compared to Wiener-based SIC scheme, the computation complexity can be dramatically reduced.
Relation:	Computer Science and Information Systems,Vol.10,Issue.2 SPL,P.877-896
Appears in Collections:	[Department of Electrical Engineering ] Periodical Articles

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