Channel Estimation and Prediction Based Adaptive Wireless Communication Systems

Wireless channels are typically much more noisy than wired links and subjected to fading due to multipath propagation which result in ISI and hence high error rate. Adaptive modulation is a powerful technique to improve the tradeoff between spectral efficiency and Bit Error Rate (BER). In order to...

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Autores principales:	Khalifa A. Salim, Mohammed A. Abdalla
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2012
Materias:	channel estimation adaptive communication Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/f796543610564558929c82f7c292044d
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spelling	oai:doaj.org-article:f796543610564558929c82f7c292044d2021-12-02T05:51:57ZChannel Estimation and Prediction Based Adaptive Wireless Communication Systems1818-11712312-0789https://doaj.org/article/f796543610564558929c82f7c292044d2012-05-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/132https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 Wireless channels are typically much more noisy than wired links and subjected to fading due to multipath propagation which result in ISI and hence high error rate. Adaptive modulation is a powerful technique to improve the tradeoff between spectral efficiency and Bit Error Rate (BER). In order to adjust the transmission rate, channel state information (CSI) is required at the transmitter side. In this paper the performance enhancement of using linear prediction along with channel estimation to track the channel variations and adaptive modulation were examined. The simulation results shows that the channel estimation is sufficient for low Doppler frequency shifts (<30 Hz), while channel prediction is much more suited at high Doppler shifts with same SNR and target BER=10-4. It was shown that the performance at higher Doppler frequency shifts (<30Hz) was improved by more than 2dB over channel estimation at target BER=10-4 and 32QAM constellation used. Khalifa A. SalimMohammed A. AbdallaAl-Khwarizmi College of Engineering – University of Baghdadarticlechannel estimationadaptive communicationChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 8, Iss 2 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	channel estimation adaptive communication Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	channel estimation adaptive communication Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Khalifa A. Salim Mohammed A. Abdalla Channel Estimation and Prediction Based Adaptive Wireless Communication Systems
description	Wireless channels are typically much more noisy than wired links and subjected to fading due to multipath propagation which result in ISI and hence high error rate. Adaptive modulation is a powerful technique to improve the tradeoff between spectral efficiency and Bit Error Rate (BER). In order to adjust the transmission rate, channel state information (CSI) is required at the transmitter side. In this paper the performance enhancement of using linear prediction along with channel estimation to track the channel variations and adaptive modulation were examined. The simulation results shows that the channel estimation is sufficient for low Doppler frequency shifts (<30 Hz), while channel prediction is much more suited at high Doppler shifts with same SNR and target BER=10-4. It was shown that the performance at higher Doppler frequency shifts (<30Hz) was improved by more than 2dB over channel estimation at target BER=10-4 and 32QAM constellation used.
format	article
author	Khalifa A. Salim Mohammed A. Abdalla
author_facet	Khalifa A. Salim Mohammed A. Abdalla
author_sort	Khalifa A. Salim
title	Channel Estimation and Prediction Based Adaptive Wireless Communication Systems
title_short	Channel Estimation and Prediction Based Adaptive Wireless Communication Systems
title_full	Channel Estimation and Prediction Based Adaptive Wireless Communication Systems
title_fullStr	Channel Estimation and Prediction Based Adaptive Wireless Communication Systems
title_full_unstemmed	Channel Estimation and Prediction Based Adaptive Wireless Communication Systems
title_sort	channel estimation and prediction based adaptive wireless communication systems
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2012
url	https://doaj.org/article/f796543610564558929c82f7c292044d
work_keys_str_mv	AT khalifaasalim channelestimationandpredictionbasedadaptivewirelesscommunicationsystems AT mohammedaabdalla channelestimationandpredictionbasedadaptivewirelesscommunicationsystems
_version_	1718400210648956928

Channel Estimation and Prediction Based Adaptive Wireless Communication Systems

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