Variable Guard Interval Based on Maximum Delay Estimation for Adaptive OFDM Systems
スポンサーリンク
概要
- 論文の詳細を見る
In orthogonal frequency division multiplexing (OFDM) system, a guard interval (GI) is used to remove the inter-symbol interference (ISI) due to a multipath channel. It is difficult to set an optimal GI length in the environment whose multipath varies. In this paper, we propose a variable guard interval based on the estimated maximum delay of a multipath channel. The maximum delay is estimated from a channel impulse response (CIR), which is estimated by a preamble symbol. However, since the estimated CIR includes the noise, it is difficult to decide the optimal GI. In order to solve the problem, we introduce the method which selects the path whose signal to noise ratio is high. Additionally, the information of the optimal GI length is required to be transmitted from a receiver to a transmitter. In this paper, we use an acknowledgment (ACK) frame for the feedback of the GI information.
- （社）電子情報通信学会の論文
- 2009-11-01
著者
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Itoh Yoshio
Department of Biotechnology, Faculty of Technology, Tokyo University of Agriculture and Technology
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TANAKA Hideaki
Department of Gastroenterology and Hepatology, Division of Clinical Medicine and Biomedical Science,
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Ishikawa Yuki
Department Of Biology Ochanomizu University
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SASAOKA Naoto
Department of Electrical and Electronics Engineering, Faculty of Engineering, Tottori University
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Ishikawa Yuki
Department Of Information And Electronics Graduate School Of Engineering Tottori University
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NAKANISHI Takaharu
Department of Information and Electronics, Graduate School of Engineering, Tottori University
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Sasaoka Naoto
Department Of Electrical And Electronics Engineering Faculty Of Engineering Tottori University
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Sasaoka Naoto
Department Of Information And Electronics Graduate School Of Engineering Tottori University
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Tanaka Hideaki
Department Of Biopharmaceutics Kyoto Pharmaceutical University
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Nakanishi Takaharu
Department Of Information And Electronics Graduate School Of Engineering Tottori University
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Itoh Yoshio
Department Of Biotechnology Faculty Of Technology Tokyo University Of Agriculture And Technology
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Itoh Yoshio
Department Of Information And Electronics Graduate School Of Engineering Tottori University
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Tanaka Hideaki
Department Of Information And Electronics Graduate School Of Engineering Tottori University
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Tanaka Hideaki
Department Of Applied Chemistry & Biochemistry Faculty Of Engineering Kumamoto University
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Itoh Yoshio
Department of Applied Chemistry, Faculty of Engineering, Tohoku University
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