Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA Receivers
In modern wideband communication receivers, the large input-signal dynamics is a fundamental problem. Unintentional signal clipping occurs, if the receiver front-end with the analog-to-digital interface cannot respond to rapidly varying conditions. This paper discusses digital postprocessing compens...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Journal of Electrical and Computer Engineering |
| Online Access: | http://dx.doi.org/10.1155/2012/532560 |
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| author | Markus Allén Toni Levanen Jaakko Marttila Mikko Valkama |
| author_facet | Markus Allén Toni Levanen Jaakko Marttila Mikko Valkama |
| author_sort | Markus Allén |
| collection | DOAJ |
| description | In modern wideband communication receivers, the large input-signal dynamics is a fundamental problem. Unintentional signal clipping occurs, if the receiver front-end with the analog-to-digital interface cannot respond to rapidly varying conditions. This paper discusses digital postprocessing compensation of such unintentional clipping in multiband OFDMA receivers. The proposed method iteratively mitigates the clipping distortion by exploiting the symbol decisions. The performance of the proposed method is illustrated with various computer simulations and also verified by concrete laboratory measurements with commercially available analog-to-digital hardware. It is shown that the clipping compensation algorithm implemented in a turbo decoding OFDM receiver is able to remove almost all the clipping distortion even under significant clipping in fading channel circumstances. That is to say, it is possible to nearly recover the receiver performance to the level, which would be achieved in the equivalent nonclipped situation. |
| format | Article |
| id | doaj-art-96f5938c589f4b8cb60dd9301765a4ba |
| institution | Kabale University |
| issn | 2090-0147 2090-0155 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Electrical and Computer Engineering |
| spelling | doaj-art-96f5938c589f4b8cb60dd9301765a4ba2025-02-03T05:45:49ZengWileyJournal of Electrical and Computer Engineering2090-01472090-01552012-01-01201210.1155/2012/532560532560Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA ReceiversMarkus Allén0Toni Levanen1Jaakko Marttila2Mikko Valkama3Department of Communications Engineering, Tampere University of Technology, P.O. Box 553, 33101 Tampere, FinlandDepartment of Communications Engineering, Tampere University of Technology, P.O. Box 553, 33101 Tampere, FinlandDepartment of Communications Engineering, Tampere University of Technology, P.O. Box 553, 33101 Tampere, FinlandDepartment of Communications Engineering, Tampere University of Technology, P.O. Box 553, 33101 Tampere, FinlandIn modern wideband communication receivers, the large input-signal dynamics is a fundamental problem. Unintentional signal clipping occurs, if the receiver front-end with the analog-to-digital interface cannot respond to rapidly varying conditions. This paper discusses digital postprocessing compensation of such unintentional clipping in multiband OFDMA receivers. The proposed method iteratively mitigates the clipping distortion by exploiting the symbol decisions. The performance of the proposed method is illustrated with various computer simulations and also verified by concrete laboratory measurements with commercially available analog-to-digital hardware. It is shown that the clipping compensation algorithm implemented in a turbo decoding OFDM receiver is able to remove almost all the clipping distortion even under significant clipping in fading channel circumstances. That is to say, it is possible to nearly recover the receiver performance to the level, which would be achieved in the equivalent nonclipped situation.http://dx.doi.org/10.1155/2012/532560 |
| spellingShingle | Markus Allén Toni Levanen Jaakko Marttila Mikko Valkama Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA Receivers Journal of Electrical and Computer Engineering |
| title | Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA Receivers |
| title_full | Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA Receivers |
| title_fullStr | Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA Receivers |
| title_full_unstemmed | Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA Receivers |
| title_short | Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA Receivers |
| title_sort | iterative signal processing for mitigation of analog to digital converter clipping distortion in multiband ofdma receivers |
| url | http://dx.doi.org/10.1155/2012/532560 |
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