Multiple antenna system and channel estimation for multiband orthogonal frequency division multiplexing in ultra-wideband systems

Multiband Orthogonal Frequency Division Multiplexing (OFDM) has been deployed for practical implementation of low cost and low power Ultra-Wideband (UWB) devices due to its ability to mitigate the narrowband interference and multipath fading effects. In order to achieve high data rates, the deployme...

Full description

Saved in:

Bibliographic Details
Main Author:	Mohamad Anas, Nuzli
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/38013/1/NuzliMohamadAnasMFKE2013.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utm-ep.38013
record_format	uketd_dc
spelling	my-utm-ep.380132018-04-12T05:40:30Z Multiple antenna system and channel estimation for multiband orthogonal frequency division multiplexing in ultra-wideband systems 2013-09 Mohamad Anas, Nuzli TK Electrical engineering. Electronics Nuclear engineering Multiband Orthogonal Frequency Division Multiplexing (OFDM) has been deployed for practical implementation of low cost and low power Ultra-Wideband (UWB) devices due to its ability to mitigate the narrowband interference and multipath fading effects. In order to achieve high data rates, the deployment of multiple antenna techniques into a UWB system has gained considerable research interest. In a UWB system, both the spatial and multipath diversities exist in UWB system can be exploited via the use of Multiple-Input Multiple-Output (MIMO) antenna system and Space-Time Codes (STC) by leveraging Alamouti scheme. This work shows that MIMO system outperforms Alamouti technique in providing a power combining gain in the receiver. Given that channel estimation for timefrequency multiplexed such as a multiband OFDM system is unexplored largely, this thesis also addresses this issue. In literature, most of the conventional Channel Frequency Response (CFR) estimations require either pre-storing a large matrix or performing real-time matrix inversion. In general, these requirements are prohibitive for practical implementation of UWB devices. In this thesis, the implementation issues of STC-based on Alamouti scheme are investigated for the multiband OFDM system. The research quantifies and analyses existing channel estimation in frequency domain such as Least-Square (LS) and Minimum Mean Square Error (MMSE) techniques. Consequently, low-complexity channel estimation based on Singular Value Decomposition (SVD) technique is developed for multiband OFDM system evaluates under modified Saleh-Valuenzela (S-V) channel modelling represents the realistic wireless indoor environment. This work implies that the SVD technique gives an improvement of 3-5 dB compared to LS technique. Even though SVD performs similarly to MMSE, it managed to reduce significantly the complexity by or to 57.8%. 2013-09 Thesis http://eprints.utm.my/id/eprint/38013/ http://eprints.utm.my/id/eprint/38013/1/NuzliMohamadAnasMFKE2013.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Electrical Engineering Faculty of Electrical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TK Electrical engineering Electronics Nuclear engineering
spellingShingle	TK Electrical engineering Electronics Nuclear engineering Mohamad Anas, Nuzli Multiple antenna system and channel estimation for multiband orthogonal frequency division multiplexing in ultra-wideband systems
description	Multiband Orthogonal Frequency Division Multiplexing (OFDM) has been deployed for practical implementation of low cost and low power Ultra-Wideband (UWB) devices due to its ability to mitigate the narrowband interference and multipath fading effects. In order to achieve high data rates, the deployment of multiple antenna techniques into a UWB system has gained considerable research interest. In a UWB system, both the spatial and multipath diversities exist in UWB system can be exploited via the use of Multiple-Input Multiple-Output (MIMO) antenna system and Space-Time Codes (STC) by leveraging Alamouti scheme. This work shows that MIMO system outperforms Alamouti technique in providing a power combining gain in the receiver. Given that channel estimation for timefrequency multiplexed such as a multiband OFDM system is unexplored largely, this thesis also addresses this issue. In literature, most of the conventional Channel Frequency Response (CFR) estimations require either pre-storing a large matrix or performing real-time matrix inversion. In general, these requirements are prohibitive for practical implementation of UWB devices. In this thesis, the implementation issues of STC-based on Alamouti scheme are investigated for the multiband OFDM system. The research quantifies and analyses existing channel estimation in frequency domain such as Least-Square (LS) and Minimum Mean Square Error (MMSE) techniques. Consequently, low-complexity channel estimation based on Singular Value Decomposition (SVD) technique is developed for multiband OFDM system evaluates under modified Saleh-Valuenzela (S-V) channel modelling represents the realistic wireless indoor environment. This work implies that the SVD technique gives an improvement of 3-5 dB compared to LS technique. Even though SVD performs similarly to MMSE, it managed to reduce significantly the complexity by or to 57.8%.
format	Thesis
qualification_level	Master's degree
author	Mohamad Anas, Nuzli
author_facet	Mohamad Anas, Nuzli
author_sort	Mohamad Anas, Nuzli
title	Multiple antenna system and channel estimation for multiband orthogonal frequency division multiplexing in ultra-wideband systems
title_short	Multiple antenna system and channel estimation for multiband orthogonal frequency division multiplexing in ultra-wideband systems
title_full	Multiple antenna system and channel estimation for multiband orthogonal frequency division multiplexing in ultra-wideband systems
title_fullStr	Multiple antenna system and channel estimation for multiband orthogonal frequency division multiplexing in ultra-wideband systems
title_full_unstemmed	Multiple antenna system and channel estimation for multiband orthogonal frequency division multiplexing in ultra-wideband systems
title_sort	multiple antenna system and channel estimation for multiband orthogonal frequency division multiplexing in ultra-wideband systems
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2013
url	http://eprints.utm.my/id/eprint/38013/1/NuzliMohamadAnasMFKE2013.pdf
_version_	1747816520634859520

Multiple antenna system and channel estimation for multiband orthogonal frequency division multiplexing in ultra-wideband systems

Similar Items