Pilot-Aided ICI Self-Cancellation Scheme for OFDM Systems

Chih-Peng LI  Wei-Wen HU  

Publication
IEICE TRANSACTIONS on Communications   Vol.E89-B   No.3   pp.955-958
Publication Date: 2006/03/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.3.955
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Transmission Systems and Transmission Equipment for Communications
Keyword: 
OFDM,  inter-carrier interference (ICI),  synchronization,  pilot,  

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Summary: 
In this letter, a novel pilot-aided inter-carrier interference (ICI) self-cancellation scheme is proposed for use in orthogonal frequency division multiplexing (OFDM) systems. The proposed scheme maps both modulated data symbols and pre-defined pilot symbols onto non-neighboring sub-carriers with weighting coefficients of +1 and -1. With the aid of pilot symbols, a more accurate estimation of frequency offsets can be obtained, and the ICI self-cancellation demodulation can be operated properly.