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: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
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| Series: | Journal of Computer Networks and Communications |
| Online Access: | http://dx.doi.org/10.1155/2018/9319204 |
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| _version_ | 1832558207033147392 |
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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. |
| format | Article |
| 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 |
| work_keys_str_mv | AT abidmuhammadkhan pilotbasedtimedomainsnrestimationforbroadcastingofdmsystems AT varunjeoti pilotbasedtimedomainsnrestimationforbroadcastingofdmsystems AT muhammadzakaurrehman pilotbasedtimedomainsnrestimationforbroadcastingofdmsystems AT muhammadtahajilani pilotbasedtimedomainsnrestimationforbroadcastingofdmsystems AT omerchugtai pilotbasedtimedomainsnrestimationforbroadcastingofdmsystems AT mubashirhussainrehmani pilotbasedtimedomainsnrestimationforbroadcastingofdmsystems |