This paper analyzes the secondary user throughput of a sensing-based cognitive radio system with Markovian traffic. Under the Markovian traffic assumption, imperfect packet capture, which occurs upon the random arrival of primary user packets, considerably affects the secondary user throughput. Considering both the primary user packet capture and energy detection of the captured packet, we derive the secondary user throughput. Additionally, using the tradeoff between the sensing accuracy and the secondary user throughput, we solve a joint optimization dealing with both the sensing duration and the sensing period to maximize the secondary user throughput with an interference constraint for the primary user.
Bibliographical noteFunding Information:
Manuscript received June 5, 2009; revised September 18, 2009, December 16, 2009, and April 12, 2010; accepted May 14, 2010. Date of publication June 14, 2010; date of current version October 20, 2010. This work was supported in part by Korea Science and Engineering Foundation through the NRL Program under Grant R0A-2007-000-20043-0 and in part by the Ministry of Knowledge Economy, Korea, under the Information Technology Research Center support program supervised by the National IT Industry Promotion Agency under Grant NIPA-2010–(C1090-1011-0005). The review of this paper was coordinated by Dr. Y.-C. Liang.
All Science Journal Classification (ASJC) codes
- Automotive Engineering
- Aerospace Engineering
- Electrical and Electronic Engineering
- Applied Mathematics