Low-Complexity ICI Cancellation in Frequency Domain for OFDM Systems in Time-Varying Multipath Channels

Hongmei WANG  Xiang CHEN  Shidong ZHOU  Ming ZHAO  Yan YAO  

IEICE TRANSACTIONS on Communications   Vol.E89-B    No.3    pp.1020-1023
Publication Date: 2006/03/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.3.1020
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
time-varying multipath channels,  orthogonal frequency division multiplexing (OFDM),  intercarrier interference (ICI),  ICI cancellation,  

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In this letter, we propose a partial minimum mean-squared error (MMSE) with successive interference cancellation (PMMSESIC) method in frequency domain to mitigate ICI caused by channel variation. Each detection, the proposed method detects the symbol with the largest received signal-to-interference-plus-noise ratio (SINR) among all the undetected symbols, using an MMSE detector that considers only the interference of several neithborhood subcarriers. Analysis and simulations show that it outperforms the MMSE method at relatively high Eb/N0 and its performance is close to the MMSE with successive detection (MMSESD) method in relatively low Doppler frequency region.