Power, sensing time, and throughput tradeoffs in cognitive radio systems

A cross-layer approach

Karama Hamdi, Khaled Letaief

Research output: Chapter in Book/Report/Conference proceedingConference contribution

43 Citations (Scopus)

Abstract

Cognitive radio has the ability to listen to the wireless channel, detect the vacant spectrum bands, and make use of them. However, the sensing ability of this smart radio may not be perfect which may induce interference to the primary system. One of the main challenges in cognitive communication lies therefore in striking a balance between the conflicting goals of minimizing the interference to the primary system and maximizing the performance of the secondary one. In this paper, we formulate a cross-layer optimization problem to design the sensing time and optimize the transmit power in order to maximize the cognitive system throughput while keeping the interference to the primary user under a threshold constraint. We study the impact of sensing time and power adaptation on the performance of the cognitive radio system. Through numerical analysis, we find that optimizing the transmit power of the cognitive user and the sensing time play an important role in maximizing the system throughput.

Original languageEnglish
Title of host publication2009 IEEE Wireless Communications and Networking Conference, WCNC 2009 - Proceedings
DOIs
Publication statusPublished - 2009
Externally publishedYes
Event2009 IEEE Wireless Communications and Networking Conference, WCNC 2009 - Budapest, Hungary
Duration: 5 Apr 20098 Apr 2009

Other

Other2009 IEEE Wireless Communications and Networking Conference, WCNC 2009
CountryHungary
CityBudapest
Period5/4/098/4/09

Fingerprint

Radio systems
Cognitive radio
Throughput
Cognitive systems
Numerical analysis
Communication

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Hamdi, K., & Letaief, K. (2009). Power, sensing time, and throughput tradeoffs in cognitive radio systems: A cross-layer approach. In 2009 IEEE Wireless Communications and Networking Conference, WCNC 2009 - Proceedings [4917914] https://doi.org/10.1109/WCNC.2009.4917914

Power, sensing time, and throughput tradeoffs in cognitive radio systems : A cross-layer approach. / Hamdi, Karama; Letaief, Khaled.

2009 IEEE Wireless Communications and Networking Conference, WCNC 2009 - Proceedings. 2009. 4917914.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hamdi, K & Letaief, K 2009, Power, sensing time, and throughput tradeoffs in cognitive radio systems: A cross-layer approach. in 2009 IEEE Wireless Communications and Networking Conference, WCNC 2009 - Proceedings., 4917914, 2009 IEEE Wireless Communications and Networking Conference, WCNC 2009, Budapest, Hungary, 5/4/09. https://doi.org/10.1109/WCNC.2009.4917914
Hamdi K, Letaief K. Power, sensing time, and throughput tradeoffs in cognitive radio systems: A cross-layer approach. In 2009 IEEE Wireless Communications and Networking Conference, WCNC 2009 - Proceedings. 2009. 4917914 https://doi.org/10.1109/WCNC.2009.4917914
Hamdi, Karama ; Letaief, Khaled. / Power, sensing time, and throughput tradeoffs in cognitive radio systems : A cross-layer approach. 2009 IEEE Wireless Communications and Networking Conference, WCNC 2009 - Proceedings. 2009.
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