The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
OFDM(Orthogonal Frequency Division Multiplexing) 시스템에서는 다중경로 채널로 인한 ISI(Inter-Symbol Interference)를 제거하기 위해 GI(Guard Interval)를 사용한다. 다중 경로가 변하는 환경에서는 최적의 GI 길이를 설정하기가 어렵습니다. 본 논문에서는 추정된 다중경로 채널의 최대 지연을 기반으로 가변 보호 구간을 제안한다. 최대 지연은 프리앰블 심볼로 추정되는 CIR(채널 임펄스 응답)으로부터 추정됩니다. 그러나 추정된 CIR에는 잡음이 포함되어 있어 최적의 GI를 결정하기 어렵다. 이러한 문제를 해결하기 위해 신호 대 잡음비가 높은 경로를 선택하는 방법을 소개한다. 또한, 수신기에서 송신기로 전송되기 위해서는 최적의 GI 길이에 대한 정보가 필요하다. 본 논문에서는 GI 정보의 피드백을 위해 ACK(acknowledgement) 프레임을 사용한다.
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부
Naoto SASAOKA, Hideaki TANAKA, Yuki ISHIKAWA, Takaharu NAKANISHI, Yoshio ITOH, "Variable Guard Interval Based on Maximum Delay Estimation for Adaptive OFDM Systems" in IEICE TRANSACTIONS on Fundamentals,
vol. E92-A, no. 11, pp. 2862-2865, November 2009, doi: 10.1587/transfun.E92.A.2862.
Abstract: 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.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E92.A.2862/_p
부
@ARTICLE{e92-a_11_2862,
author={Naoto SASAOKA, Hideaki TANAKA, Yuki ISHIKAWA, Takaharu NAKANISHI, Yoshio ITOH, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Variable Guard Interval Based on Maximum Delay Estimation for Adaptive OFDM Systems},
year={2009},
volume={E92-A},
number={11},
pages={2862-2865},
abstract={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.},
keywords={},
doi={10.1587/transfun.E92.A.2862},
ISSN={1745-1337},
month={November},}
부
TY - JOUR
TI - Variable Guard Interval Based on Maximum Delay Estimation for Adaptive OFDM Systems
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2862
EP - 2865
AU - Naoto SASAOKA
AU - Hideaki TANAKA
AU - Yuki ISHIKAWA
AU - Takaharu NAKANISHI
AU - Yoshio ITOH
PY - 2009
DO - 10.1587/transfun.E92.A.2862
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E92-A
IS - 11
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - November 2009
AB - 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.
ER -