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
본 논문에서는 시변 다중 경로 페이딩 채널에서 적응형 다중반송파 등화 시스템에 대한 채널 추적 기능을 통해 채널 추정 정확도를 향상시키는 새로운 접근 방식을 제안합니다. 개선은 채널이 전송된 블록 기간 동안 정적이며 여러 블록 기간에 걸쳐 천천히 선형적으로 변한다는 가정을 기반으로 수행됩니다. 서로 다른 블록에서 파생된 연결된 채널 전달 함수에 IFFT를 적용하면 잡음 평균 향상이 달성되고 약간의 지연이 있는 채널 계수의 더 나은 추정을 얻을 수 있습니다. 지연을 보상하고 채널 추적 성능 측면에서 시스템을 더욱 견고하게 만들기 위해 다단계 채널 예측기와 평활화 필터가 사용됩니다. 적응형 시간 영역 등화는 주파수 영역 접근 방식에서 발견되는 채널 가역성 문제를 피하기 위해 이 접근 방식과 함께 수행됩니다. 짧은 기간의 훈련 시퀀스가 활용되어 사용 가능한 통신 용량을 보다 효율적으로 사용할 수 있습니다. 제안된 접근 방식의 효율성은 시변 다중 경로 페이딩 채널의 다중 반송파 시스템에 대한 시뮬레이션을 통해 평가됩니다. 결과는 이전 채널 추정 방식에 비해 개선된 모습을 보여줍니다.
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부
Wichai PONGWILAI, Sawasd TANTARATANA, "A Time-Domain Joint Adaptive Channel Estimator and Equalizer for Multi-Carrier Systems in Time-Variant Multipath Channels Using Short Training Sequences" in IEICE TRANSACTIONS on Communications,
vol. E85-B, no. 12, pp. 2797-2806, December 2002, doi: .
Abstract: In this paper, a new approach is proposed to improve the channel estimation accuracy with channel tracking capability for adaptive multicarrier equalization systems under time-variant multipath fading channel. The improvement is carried out based on the assumption that the channel is static over a transmitted block period, and slowly linearly changing over several block periods. By applying IFFT to the concatenated channel transfer function derived from different blocks, the noise-averaging improvement is achieved, and a better estimation of the channel coefficients with some delay can be obtained. A multi-step channel predictor and a smoothing filter is utilized to compensate for the delay and make the system more robust in terms of channel tracking performance. Adaptive time domain equalization is jointly performed with this approach to avoid the channel invertibility problem found in the frequency domain approach. A short period of training sequences is utilized resulting in more efficient use of available communication capacity. The effectiveness of the proposed approach is evaluated through simulation for multicarrier systems in time-variant multipath fading channels. Results show improvement over previous channel estimation schemes.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e85-b_12_2797/_p
부
@ARTICLE{e85-b_12_2797,
author={Wichai PONGWILAI, Sawasd TANTARATANA, },
journal={IEICE TRANSACTIONS on Communications},
title={A Time-Domain Joint Adaptive Channel Estimator and Equalizer for Multi-Carrier Systems in Time-Variant Multipath Channels Using Short Training Sequences},
year={2002},
volume={E85-B},
number={12},
pages={2797-2806},
abstract={In this paper, a new approach is proposed to improve the channel estimation accuracy with channel tracking capability for adaptive multicarrier equalization systems under time-variant multipath fading channel. The improvement is carried out based on the assumption that the channel is static over a transmitted block period, and slowly linearly changing over several block periods. By applying IFFT to the concatenated channel transfer function derived from different blocks, the noise-averaging improvement is achieved, and a better estimation of the channel coefficients with some delay can be obtained. A multi-step channel predictor and a smoothing filter is utilized to compensate for the delay and make the system more robust in terms of channel tracking performance. Adaptive time domain equalization is jointly performed with this approach to avoid the channel invertibility problem found in the frequency domain approach. A short period of training sequences is utilized resulting in more efficient use of available communication capacity. The effectiveness of the proposed approach is evaluated through simulation for multicarrier systems in time-variant multipath fading channels. Results show improvement over previous channel estimation schemes.},
keywords={},
doi={},
ISSN={},
month={December},}
부
TY - JOUR
TI - A Time-Domain Joint Adaptive Channel Estimator and Equalizer for Multi-Carrier Systems in Time-Variant Multipath Channels Using Short Training Sequences
T2 - IEICE TRANSACTIONS on Communications
SP - 2797
EP - 2806
AU - Wichai PONGWILAI
AU - Sawasd TANTARATANA
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E85-B
IS - 12
JA - IEICE TRANSACTIONS on Communications
Y1 - December 2002
AB - In this paper, a new approach is proposed to improve the channel estimation accuracy with channel tracking capability for adaptive multicarrier equalization systems under time-variant multipath fading channel. The improvement is carried out based on the assumption that the channel is static over a transmitted block period, and slowly linearly changing over several block periods. By applying IFFT to the concatenated channel transfer function derived from different blocks, the noise-averaging improvement is achieved, and a better estimation of the channel coefficients with some delay can be obtained. A multi-step channel predictor and a smoothing filter is utilized to compensate for the delay and make the system more robust in terms of channel tracking performance. Adaptive time domain equalization is jointly performed with this approach to avoid the channel invertibility problem found in the frequency domain approach. A short period of training sequences is utilized resulting in more efficient use of available communication capacity. The effectiveness of the proposed approach is evaluated through simulation for multicarrier systems in time-variant multipath fading channels. Results show improvement over previous channel estimation schemes.
ER -