Estimation of Compressible Channel Impulse Response for OFDM Modulated Transmissions

Channel estimation scheme for OFDM modulated transmissions usually combines an initial block-pilot-assisted stage with a tracking one based on comb or scattered pilots distributed among user data in the signal frame. The channel reconstruction accuracy in the former stage has a significant impact on...

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Autores principales:	Grzegorz Dziwoki, Marcin Kucharczyk
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	OFDM modulation channel estimation compressible channel impulse response DFT-based methods greedy methods Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/8b9b326a0d594a2eb3b91fedb40515bd
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id	oai:doaj.org-article:8b9b326a0d594a2eb3b91fedb40515bd
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spelling	oai:doaj.org-article:8b9b326a0d594a2eb3b91fedb40515bd2021-11-25T17:24:35ZEstimation of Compressible Channel Impulse Response for OFDM Modulated Transmissions10.3390/electronics102227812079-9292https://doaj.org/article/8b9b326a0d594a2eb3b91fedb40515bd2021-11-01T00:00:00Zhttps://www.mdpi.com/2079-9292/10/22/2781https://doaj.org/toc/2079-9292Channel estimation scheme for OFDM modulated transmissions usually combines an initial block-pilot-assisted stage with a tracking one based on comb or scattered pilots distributed among user data in the signal frame. The channel reconstruction accuracy in the former stage has a significant impact on tracking efficiency of the channel variations and the overall transmission quality. The paper presents a new block-pilot-assisted channel reconstruction procedure based on the DFT-based approach and the Least Square impulse response estimation. The proposed method takes into account a compressibility feature of the channel impulse response and restores its coefficients in groups of automatically controlled size. The proposition is analytically explained and tested in a OFDM simulation environment. The popular DFT-based methods including compressed sensing oriented one were used as references for comparison purposes. The obtained results show a quality improvement in terms of Bit Error Rate and Mean Square Error measures in low and mid ranges of signal-to-noise ratio without significant computational complexity growth in comparison to the classical DFT-based solutions. Moreover, additional multiplication operations can be eliminated, compared to the competitive, in terms of estimation quality, compressed sensing reconstruction method based on greedy approach.Grzegorz DziwokiMarcin KucharczykMDPI AGarticleOFDM modulationchannel estimationcompressible channel impulse responseDFT-based methodsgreedy methodsElectronicsTK7800-8360ENElectronics, Vol 10, Iss 2781, p 2781 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	OFDM modulation channel estimation compressible channel impulse response DFT-based methods greedy methods Electronics TK7800-8360
spellingShingle	OFDM modulation channel estimation compressible channel impulse response DFT-based methods greedy methods Electronics TK7800-8360 Grzegorz Dziwoki Marcin Kucharczyk Estimation of Compressible Channel Impulse Response for OFDM Modulated Transmissions
description	Channel estimation scheme for OFDM modulated transmissions usually combines an initial block-pilot-assisted stage with a tracking one based on comb or scattered pilots distributed among user data in the signal frame. The channel reconstruction accuracy in the former stage has a significant impact on tracking efficiency of the channel variations and the overall transmission quality. The paper presents a new block-pilot-assisted channel reconstruction procedure based on the DFT-based approach and the Least Square impulse response estimation. The proposed method takes into account a compressibility feature of the channel impulse response and restores its coefficients in groups of automatically controlled size. The proposition is analytically explained and tested in a OFDM simulation environment. The popular DFT-based methods including compressed sensing oriented one were used as references for comparison purposes. The obtained results show a quality improvement in terms of Bit Error Rate and Mean Square Error measures in low and mid ranges of signal-to-noise ratio without significant computational complexity growth in comparison to the classical DFT-based solutions. Moreover, additional multiplication operations can be eliminated, compared to the competitive, in terms of estimation quality, compressed sensing reconstruction method based on greedy approach.
format	article
author	Grzegorz Dziwoki Marcin Kucharczyk
author_facet	Grzegorz Dziwoki Marcin Kucharczyk
author_sort	Grzegorz Dziwoki
title	Estimation of Compressible Channel Impulse Response for OFDM Modulated Transmissions
title_short	Estimation of Compressible Channel Impulse Response for OFDM Modulated Transmissions
title_full	Estimation of Compressible Channel Impulse Response for OFDM Modulated Transmissions
title_fullStr	Estimation of Compressible Channel Impulse Response for OFDM Modulated Transmissions
title_full_unstemmed	Estimation of Compressible Channel Impulse Response for OFDM Modulated Transmissions
title_sort	estimation of compressible channel impulse response for ofdm modulated transmissions
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8b9b326a0d594a2eb3b91fedb40515bd
work_keys_str_mv	AT grzegorzdziwoki estimationofcompressiblechannelimpulseresponseforofdmmodulatedtransmissions AT marcinkucharczyk estimationofcompressiblechannelimpulseresponseforofdmmodulatedtransmissions
_version_	1718412420980932608

Estimation of Compressible Channel Impulse Response for OFDM Modulated Transmissions

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