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Adaptive Linear Symbol Detection for OFDM Systems in Time-Frequency-Selective Fading Channels
Hoojin LEE Joonhyuk KANG Edward J. POWERS
IEICE TRANSACTIONS on Communications
Publication Date: 2007/03/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
orthogonal frequency division multiplexing, time-frequency-selective fading channel, intercarrier interference, symbol detection,
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Time-frequency-selective, equivalently time-variant multipath, fading channels in orthogonal frequency division multiplexing (OFDM) systems introduce intercarrier interference (ICI), resulting in severe performance degradation. To suppress the effect of ICI, several symbol detection methods have been proposed, all of which are based on the observation that most of the ICI's power is distributed near the desired subcarrier. However, these methods usually ignore the channel variation in a OFDM symbol block by fixing the number of considered ICI terms. Therefore, we propose a novel frequency-domain symbol detection method with moderate complexity, which adaptively determines the number of ICI terms within each OFDM symbol block.