Pilot-Based Time Domain SNR Estimation for Broadcasting OFDM Systems

The estimation of signal-to-noise ratio (SNR) is a major issue in wireless orthogonal frequency-division multiplexing (OFDM) system. In OFDM system, each frame starts with a preamble symbol that facilitates the SNR estimation. However, the performance of preamble-based SNR estimation schemes worsens...

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Main Authors: Abid Muhammad Khan, Varun Jeoti, Muhammad Zaka Ur Rehman, Muhammad Taha Jilani, Omer Chugtai, Mubashir Hussain Rehmani
Format: Article
Language:English
Published: Wiley 2018-01-01
Series:Journal of Computer Networks and Communications
Online Access:http://dx.doi.org/10.1155/2018/9319204
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author Abid Muhammad Khan
Varun Jeoti
Muhammad Zaka Ur Rehman
Muhammad Taha Jilani
Omer Chugtai
Mubashir Hussain Rehmani
author_facet Abid Muhammad Khan
Varun Jeoti
Muhammad Zaka Ur Rehman
Muhammad Taha Jilani
Omer Chugtai
Mubashir Hussain Rehmani
author_sort Abid Muhammad Khan
collection DOAJ
description The estimation of signal-to-noise ratio (SNR) is a major issue in wireless orthogonal frequency-division multiplexing (OFDM) system. In OFDM system, each frame starts with a preamble symbol that facilitates the SNR estimation. However, the performance of preamble-based SNR estimation schemes worsens in the fast-changing environment where channel changes symbol to symbol. Accordingly, in this paper, we propose a novel pilot-based SNR estimation scheme that optimally exploits the pilot subcarriers that are inserted in each data symbol of the OFDM frame. The proposed scheme computes the circular correlation between the received signal and the comb-type pilot sequence to obtain the SNR. The simulation results are compared with the conventional preamble-based Zadoff-Chu sequence SNR estimator. The results indicate that the proposed scheme generates near-ideal accuracy; especially in low SNR regimes, in terms of the normalized mean square error (NMSE). Moreover, this scheme offers a significant saving of computation over a conventional time domain SNR estimator.
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id doaj-art-dca69eb4e41c4b01b16d07be975a2796
institution Kabale University
issn 2090-7141
2090-715X
language English
publishDate 2018-01-01
publisher Wiley
record_format Article
series Journal of Computer Networks and Communications
spelling doaj-art-dca69eb4e41c4b01b16d07be975a27962025-02-03T01:33:03ZengWileyJournal of Computer Networks and Communications2090-71412090-715X2018-01-01201810.1155/2018/93192049319204Pilot-Based Time Domain SNR Estimation for Broadcasting OFDM SystemsAbid Muhammad Khan0Varun Jeoti1Muhammad Zaka Ur Rehman2Muhammad Taha Jilani3Omer Chugtai4Mubashir Hussain Rehmani5Department of Electrical and Electronics Engineering, Universiti Teknologi PETRONAS, Seri Iskandar, MalaysiaDepartment of Electrical and Electronics Engineering, Universiti Teknologi PETRONAS, Seri Iskandar, MalaysiaDepartment of Electrical and Electronics Engineering, Universiti Teknologi PETRONAS, Seri Iskandar, MalaysiaGraduate School of Science and Engineering, PAF-Karachi Institute of Economics and Technology, Karachi, PakistanDepartment of Electrical Engineering, COMSATS Institute of Information Technology, Wah Cantt, PakistanDepartment of Electrical Engineering, COMSATS Institute of Information Technology, Wah Cantt, PakistanThe estimation of signal-to-noise ratio (SNR) is a major issue in wireless orthogonal frequency-division multiplexing (OFDM) system. In OFDM system, each frame starts with a preamble symbol that facilitates the SNR estimation. However, the performance of preamble-based SNR estimation schemes worsens in the fast-changing environment where channel changes symbol to symbol. Accordingly, in this paper, we propose a novel pilot-based SNR estimation scheme that optimally exploits the pilot subcarriers that are inserted in each data symbol of the OFDM frame. The proposed scheme computes the circular correlation between the received signal and the comb-type pilot sequence to obtain the SNR. The simulation results are compared with the conventional preamble-based Zadoff-Chu sequence SNR estimator. The results indicate that the proposed scheme generates near-ideal accuracy; especially in low SNR regimes, in terms of the normalized mean square error (NMSE). Moreover, this scheme offers a significant saving of computation over a conventional time domain SNR estimator.http://dx.doi.org/10.1155/2018/9319204
spellingShingle Abid Muhammad Khan
Varun Jeoti
Muhammad Zaka Ur Rehman
Muhammad Taha Jilani
Omer Chugtai
Mubashir Hussain Rehmani
Pilot-Based Time Domain SNR Estimation for Broadcasting OFDM Systems
Journal of Computer Networks and Communications
title Pilot-Based Time Domain SNR Estimation for Broadcasting OFDM Systems
title_full Pilot-Based Time Domain SNR Estimation for Broadcasting OFDM Systems
title_fullStr Pilot-Based Time Domain SNR Estimation for Broadcasting OFDM Systems
title_full_unstemmed Pilot-Based Time Domain SNR Estimation for Broadcasting OFDM Systems
title_short Pilot-Based Time Domain SNR Estimation for Broadcasting OFDM Systems
title_sort pilot based time domain snr estimation for broadcasting ofdm systems
url http://dx.doi.org/10.1155/2018/9319204
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AT muhammadzakaurrehman pilotbasedtimedomainsnrestimationforbroadcastingofdmsystems
AT muhammadtahajilani pilotbasedtimedomainsnrestimationforbroadcastingofdmsystems
AT omerchugtai pilotbasedtimedomainsnrestimationforbroadcastingofdmsystems
AT mubashirhussainrehmani pilotbasedtimedomainsnrestimationforbroadcastingofdmsystems