Optimal Transmission Time of Secondary User in an Overlay Cognitive Radio System

• Autorzy: Abbasi B. B. , Saberinia E.
• Języki publikacji: EN

Abstrakty

EN

Optimal Opportunistic channel access of the unlicensed users has been a major problem in a cognitive radio system. In this paper, we consider an overlay cognitive radio system, where the secondary user senses the channel for an empty slot and transmits a constant power for a time period without sensing the channel again. We obtain the optimal transmission time of the secondary user to achieve the maximum data rate while keeping the interference on the primary user under a given threshold. We derive closed-form expressions for the interference at the primary receiver and the achievable data rate for the secondary user. Our analysis is based on a Markov model for the primary user active and idle times and we consider the probability of error in sensing by the secondary user. Computer simulation results of the system show the validity of our analysis.

Słowa kluczowe

EN

cognitive radio; overlay system; interference analysis; imperfect sensing

• Wydawca: Polish Academy of Sciences, Committee of Electronics and Telecommunication
• Czasopismo: Electronics and Telecommunications Quarterly
• Rocznik: 2009
• Tom: Vol. 55, No 2
• Strony: 377--387
• Opis fizyczny: Bibliogr. 12 poz., wykr.

Twórcy

autor

Abbasi B. B.

autor

Saberinia E.

• Department of Electrical and Computer Engineering,University of Nevada, Las Vegas, NV 89154 USA,

Bibliografia

• 1. S. Haykin: Cognitive radio: Brain-empowered wireless communications, IEEE J. Selected. Areas of Communications, Vol. 23, no. 2, pp. 201-220, February 2005.
• 2. K. Hamdi, W. Zhang, K. Ben Letaief: Power Control in Cognitive Radio Systems Based on Spectrum Sensing Side Information, IEEE International Conference on communications, pp. 24-28, June 2007.
• 3. S. Huang, X. Liu, Z. Ding: Opportunistic spectrum access in cognitive radio networks, Proceedings of the 27th IEEE Conference on Computer Communications, pp. 1427-1435, April 2008.
• 4. R. Urgaonkar, M. J. Neely: Opportunistic Scheduling with Reliability Guarantees in Cognitive Radio Networks, Proceedings of the 27th IEEE Conference on Computer Communications, pp. 1301-1309, April 2008.
• 5. Q. Yang, S. Xu, K. S. Kwak: Outage Performance of Cognitive Radio with Multiple Receive Antennas, IEICE Transaction on Communications, Vol. E91.B, pp. 85-94, January 2008.
• 6. S. Srinivasa, S. A. Jafar: Soft Sensing and Optimal Power Control for Cognitive Radio, IEEE Global Telecommunications Conference, pp. 1380-1384, November 2007.
• 7. S. Srinivasa, S. A. Jafar: Cognitive Radio Networks: How Much Spectrum Sharing is Optimal?, IEEE Global Telecommunications Conference, pp. 3149-3153, November 2007.
• 8. W. S. Jeon, D. G. Jeong: An efficient quiet period management scheme for cognitive radio systems, IEEE Transactions on Wireless Communications, Vol. 7, issue 2, pp. 505-509, February 2008.
• 9. Q. Zhao, L. Tong, A. Swami: Decentralized cognitive Mac for Dynamic spectrum access, First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, DySPAN 2005, pp. 224-232, Nov 2005.
• 10. J. Hillenbrand, T. A. Weiss, F. K. Jondral: Calculation of detection and false alarm probabilities in spectrum pooling systems, IEEE Communications. Letters, Vol. 9, no. 4, pp. 349-351, April 2005.
• 11. R. Etkin, A. Parekh, D. Tse: Spectrum sharing for unlicensed bands, First IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN, pp. 251-258, 2005.
• 12. Q. Zhao, S. Geirhofer, L. Tong, B. M. Sadler: Optimal dynamic spectrum access via periodic channel sensing, in Proc. Wireless Communications and Networking Conference (WCNC), 2007.