Development And Implementation Of Improved Coded OFDM System Using SDR Platform

he increasing demand for high speed wireless connectivity at low cost poses new challenges for communication system designers, to implement solutions that increase the data rate by utilizing the limited radio resources more efficiently at a low additional complexity. Adaptive Coding and Modulatio...

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Main Author:	Hamid, Hamood Shehab
Format:	Thesis
Language:	English
Published:	2010
Subjects:	TK1-9971 Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.usm.my/41635/1/Hamood_Shehab_Hamid_HJ.pdf
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id	my-usm-ep.41635
record_format	uketd_dc
spelling	my-usm-ep.416352019-04-12T05:26:46Z Development And Implementation Of Improved Coded OFDM System Using SDR Platform 2010-11 Hamid, Hamood Shehab TK1-9971 Electrical engineering. Electronics. Nuclear engineering he increasing demand for high speed wireless connectivity at low cost poses new challenges for communication system designers, to implement solutions that increase the data rate by utilizing the limited radio resources more efficiently at a low additional complexity. Adaptive Coding and Modulation (ACM) exploits the flexibility of channel coding and constellation in Orthogonal Frequency Division Multiplexing (OFDM) to obtain higher data rates. This technique employs multiple modulation and coding schemes to instantaneously adapt to the variations in the channel Signal to Noise Ratio (SNR), thus maximizing the system throughput and improving Bit Error Rate (BER) performance. On the other hand, OFDM system suffers from inter-symbol interference (ISI), especially in mobile communication environments. This problem may be tackled by increasing the individual symbol duration for each subcarrier together with the use of guard time. Nevertheless, this does not solve the problem completely in multipath fading channel, because all subcarriers will arrive at the receiver with different amplitudes. Unfortunately, some subcarriers may be completely lost because of deep fades. Hence even though most subcarriers may be detected without errors, the overall BER will be largely dominated by a few subcarriers with bad SNR. To eliminate this problem, OFDM based systems usually employ a special technique like error correction coding (ECC). Various coding methods are adopted by many standards to mitigate the effects of frequency selective channel which causes bit errors to occur in burs 2010-11 Thesis http://eprints.usm.my/41635/ http://eprints.usm.my/41635/1/Hamood_Shehab_Hamid_HJ.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Elektrik & Elektronik
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TK1-9971 Electrical engineering Electronics Nuclear engineering
spellingShingle	TK1-9971 Electrical engineering Electronics Nuclear engineering Hamid, Hamood Shehab Development And Implementation Of Improved Coded OFDM System Using SDR Platform
description	he increasing demand for high speed wireless connectivity at low cost poses new challenges for communication system designers, to implement solutions that increase the data rate by utilizing the limited radio resources more efficiently at a low additional complexity. Adaptive Coding and Modulation (ACM) exploits the flexibility of channel coding and constellation in Orthogonal Frequency Division Multiplexing (OFDM) to obtain higher data rates. This technique employs multiple modulation and coding schemes to instantaneously adapt to the variations in the channel Signal to Noise Ratio (SNR), thus maximizing the system throughput and improving Bit Error Rate (BER) performance. On the other hand, OFDM system suffers from inter-symbol interference (ISI), especially in mobile communication environments. This problem may be tackled by increasing the individual symbol duration for each subcarrier together with the use of guard time. Nevertheless, this does not solve the problem completely in multipath fading channel, because all subcarriers will arrive at the receiver with different amplitudes. Unfortunately, some subcarriers may be completely lost because of deep fades. Hence even though most subcarriers may be detected without errors, the overall BER will be largely dominated by a few subcarriers with bad SNR. To eliminate this problem, OFDM based systems usually employ a special technique like error correction coding (ECC). Various coding methods are adopted by many standards to mitigate the effects of frequency selective channel which causes bit errors to occur in burs
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Hamid, Hamood Shehab
author_facet	Hamid, Hamood Shehab
author_sort	Hamid, Hamood Shehab
title	Development And Implementation Of Improved Coded OFDM System Using SDR Platform
title_short	Development And Implementation Of Improved Coded OFDM System Using SDR Platform
title_full	Development And Implementation Of Improved Coded OFDM System Using SDR Platform
title_fullStr	Development And Implementation Of Improved Coded OFDM System Using SDR Platform
title_full_unstemmed	Development And Implementation Of Improved Coded OFDM System Using SDR Platform
title_sort	development and implementation of improved coded ofdm system using sdr platform
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Elektrik & Elektronik
publishDate	2010
url	http://eprints.usm.my/41635/1/Hamood_Shehab_Hamid_HJ.pdf
_version_	1747820945589927936

Development And Implementation Of Improved Coded OFDM System Using SDR Platform

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