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Iterative Sequential OFDM Symbol Estimation Algorithm over Time-Frequency-Selective Fading Channels
Hoojin LEE Joonhyuk KANG Edward J. POWERS
Publication
IEICE TRANSACTIONS on Communications
Vol.E89-B
No.6
pp.1922-1925 Publication Date: 2006/06/01 Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.6.1922 Print ISSN: 0916-8516 Type of Manuscript: LETTER Category: Wireless Communication Technologies Keyword: OFDM, symbol estimation, time-frequency-selective fading channel,
Full Text: PDF(225.8KB)>>
Summary:
Time-frequency-selective, i.e., time-variant multipath, fading in orthogonal frequency division multiplexing (OFDM) systems destroys subcarrier orthogonality, resulting in intercarrier interference (ICI). In general, the previously proposed estimation schemes to resolve this problem are only applicable to slowly time-variant channels or suffer from high complexity due to large-sized matrix inversion. In this letter, we propose and develop efficient symbol estimation schemes, called the iterative sequential neighbor search (ISNS) algorithm and the simplified iterative sequential neighbor search (S-ISNS) algorithm. These algorithms achieve enhanced performances with low complexities, compared to the existing estimation methods.
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