Presentation 2007-04-20
Proposal of Demodulation Method for OFDM System under Multi-path Fading Environments with Delay Spread Greater than Guard Interval
Kazuya MORIWAKI, Katsuhiro NAITO, Kazuo MORI, Hideo KOBAYASHI,
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Abstract(in English) The orthogonal frequency division multiplexing technique (OFDM) has recently received considerable attention in the fields of wireless communications for its efficient usage of frequency bandwidth and robustness to the multi-path fading. However, the bit error rate (BER) performance of OFDM technique would be degraded severaly due to the occurrence of inter carrier interference (ICI) and inter symbol interference (ISI) when the delay spread is larger than the predetermined guard interval (GI). This paper proposes a novel demodulation method for OFDM system, which can achiece the better BER performance under the multi-path fading environments even when the delay spread is larger than the GI. The feature of proposed method is to reconstruct the delay signals of exceeding the GI by using the estimated time domain channel impulse response and the temporary decision data information. This paper presents various computer simulation results under the static and mobile conditions to verify the effectiveness of proposed method as comparing with the conventional method.
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Keyword(in English) OFDM / Guard Interval / ISI / ICI / Maximum Likelihood(ML)
Paper # SAT2007-5
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Committee SAT
Conference Date 2007/4/13(1days)
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Registration To Satellite Telecommunications (SAT)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Proposal of Demodulation Method for OFDM System under Multi-path Fading Environments with Delay Spread Greater than Guard Interval
Sub Title (in English)
Keyword(1) OFDM
Keyword(2) Guard Interval
Keyword(3) ISI
Keyword(4) ICI
Keyword(5) Maximum Likelihood(ML)
1st Author's Name Kazuya MORIWAKI
1st Author's Affiliation Graduate School of Engineering, Mie University()
2nd Author's Name Katsuhiro NAITO
2nd Author's Affiliation Graduate School of Engineering, Mie University
3rd Author's Name Kazuo MORI
3rd Author's Affiliation Graduate School of Engineering, Mie University
4th Author's Name Hideo KOBAYASHI
4th Author's Affiliation Graduate School of Engineering, Mie University
Date 2007-04-20
Paper # SAT2007-5
Volume (vol) vol.107
Number (no) 11
Page pp.pp.-
#Pages 6
Date of Issue