An ICI Mitigation Method for High Speed Mobile OFDM

Yi LONG  Linling KUANG  Jianhua LU  

IEICE TRANSACTIONS on Communications   Vol.E91-B   No.5   pp.1661-1664
Publication Date: 2008/05/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.5.1661
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Terrestrial Radio Communications
OFDM,  time-varying,  multipath,  ICI,  

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This letter proposes a novel intercarrier interference (ICI) mitigation method for OFDM in time-varying multipath channels. By splitting an OFDM symbol into sub-symbols, ICI may be relieved but with price of increased inter-subsymbol-interference (ISI). The induced ISI is then cancelled by a linear filter with the use of null subcarriers. Simulations show that the proposed method may effectively mitigate ICI while improving OFDM with enhanced reliability against high Doppler spread.