A robust and secure time-domain ICI canceller for OFDM based ubiquitous systems in time-varying multipath channels

A robust and secure time-domain cancellation is proposed for inter-carrier interference (ICI) reduction in OFDM systems for ubiquitous environments. To cope with the problem of the conventional time-domain canceller, which does not work in deep fades, simple repetition (de)coding and modulation orde...

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Bibliographic Details
Published in:The Journal of supercomputing 2008-07, Vol.45 (1), p.29-43
Main Authors: Seo, Jeong-Wook, Yeo, Sang-Soo, Park, Kyoo Seok, Chang, Hang Bae, Cho, Sung-Eon, Kim, Dong-Ku
Format: Article
Language:English
Subjects:
Approximation
Cancellation
Cancellers
Channels
Compilers
Computer Science
Interpreters
Modulation
Orthogonal Frequency Division Multiplexing
Processor Architectures
Programming Languages
Repetition
Simulation
Spectra
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Summary:A robust and secure time-domain cancellation is proposed for inter-carrier interference (ICI) reduction in OFDM systems for ubiquitous environments. To cope with the problem of the conventional time-domain canceller, which does not work in deep fades, simple repetition (de)coding and modulation order increasing techniques are exploited in our proposal. The approximated repetition decoding provides reliable symbols in the regeneration operation, and the increased modulation order maintains the spectral efficiency. Simulation results indicate that the proposed method using 16QAM significantly improves the BER performance compared with the conventional method using QPSK, while the spectral efficiency is maintained. Moreover, the proposed method using 64QAM concurrently improves both the BER performance and the spectral efficiency.
ISSN:0920-8542
1573-0484
DOI:10.1007/s11227-008-0177-1