Cognitive Multihop Wireless Sensor Networks over Nakagami- Fading Channels
Considering the effect of imperfect channel state information (CSI), we study the performance of a cluster-based cognitive multihop wireless sensor network with decode-and-forward (DF) partial relay selection over Nakagami- m fading channels. The closed-form expressions for the exact outage probabil...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2014-08-01
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| Series: | International Journal of Distributed Sensor Networks |
| Online Access: | https://doi.org/10.1155/2014/630823 |
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| _version_ | 1832556823352180736 |
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| author | Xing Zhang Jia Xing Zhi Yan Yue Gao Wenbo Wang |
| author_facet | Xing Zhang Jia Xing Zhi Yan Yue Gao Wenbo Wang |
| author_sort | Xing Zhang |
| collection | DOAJ |
| description | Considering the effect of imperfect channel state information (CSI), we study the performance of a cluster-based cognitive multihop wireless sensor network with decode-and-forward (DF) partial relay selection over Nakagami- m fading channels. The closed-form expressions for the exact outage probability and bit error rate (BER) of the secondary system are derived and validated by simulations. Asymptotic outage analysis in high SNR regime reveals that the diversity order is determined by the minimum fading severity parameter of all the secondary transmission links, irrespective of the CSI imperfection. It is shown that the fading severity of the secondary transmission links has more influence on the outage performance than that of the interference links. We also conclude that, for secondary nodes whose transmit power is restricted by the interference constraint of the primary user, increasing the number of relaying hops is an effective way to improve their transmission performance. Besides, increasing the number of available relays in each relay cluster can mitigate the performance degradation caused by CSI imperfection. |
| format | Article |
| id | doaj-art-79c98bdfbc024f8cbf16854b46104201 |
| institution | Kabale University |
| issn | 1550-1477 |
| language | English |
| publishDate | 2014-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Distributed Sensor Networks |
| spelling | doaj-art-79c98bdfbc024f8cbf16854b461042012025-02-03T05:44:20ZengWileyInternational Journal of Distributed Sensor Networks1550-14772014-08-011010.1155/2014/630823630823Cognitive Multihop Wireless Sensor Networks over Nakagami- Fading ChannelsXing Zhang0Jia Xing1Zhi Yan2Yue Gao3Wenbo Wang4 School of Information and Communications Engineering, Key Lab of Universal Wireless Communications (UWC), Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China School of Information and Communications Engineering, Key Lab of Universal Wireless Communications (UWC), Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China School of Electrical and Information Engineering, Hunan University, Changsha, Hunan 410082, China School of Electronic Engineering and Computer Science, Queen Mary University of London, London E1 4NS, UK School of Information and Communications Engineering, Key Lab of Universal Wireless Communications (UWC), Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaConsidering the effect of imperfect channel state information (CSI), we study the performance of a cluster-based cognitive multihop wireless sensor network with decode-and-forward (DF) partial relay selection over Nakagami- m fading channels. The closed-form expressions for the exact outage probability and bit error rate (BER) of the secondary system are derived and validated by simulations. Asymptotic outage analysis in high SNR regime reveals that the diversity order is determined by the minimum fading severity parameter of all the secondary transmission links, irrespective of the CSI imperfection. It is shown that the fading severity of the secondary transmission links has more influence on the outage performance than that of the interference links. We also conclude that, for secondary nodes whose transmit power is restricted by the interference constraint of the primary user, increasing the number of relaying hops is an effective way to improve their transmission performance. Besides, increasing the number of available relays in each relay cluster can mitigate the performance degradation caused by CSI imperfection.https://doi.org/10.1155/2014/630823 |
| spellingShingle | Xing Zhang Jia Xing Zhi Yan Yue Gao Wenbo Wang Cognitive Multihop Wireless Sensor Networks over Nakagami- Fading Channels International Journal of Distributed Sensor Networks |
| title | Cognitive Multihop Wireless Sensor Networks over Nakagami- Fading Channels |
| title_full | Cognitive Multihop Wireless Sensor Networks over Nakagami- Fading Channels |
| title_fullStr | Cognitive Multihop Wireless Sensor Networks over Nakagami- Fading Channels |
| title_full_unstemmed | Cognitive Multihop Wireless Sensor Networks over Nakagami- Fading Channels |
| title_short | Cognitive Multihop Wireless Sensor Networks over Nakagami- Fading Channels |
| title_sort | cognitive multihop wireless sensor networks over nakagami fading channels |
| url | https://doi.org/10.1155/2014/630823 |
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