南京邮电大学学报（自然科学版）2011，Vol.31Issue(1)：16-22,7.
认知无线电系统中检测时间和检测周期的联合优化
Joint Optimization of Sensing Period and Sensing Interval in Cognitive Radio Networks
摘要
Abstract
Sensing/monitoring of spectrum-availability has been identified as a key requirement for dynamic spectrum allocation in cognitive radio networks (CRNs). Sensing duration and sensing interval are two significant parameters associated with spectrum sensing, which directly affect the detection probability of available spectrum and the collision probability of the primary and secondary users. In this paper, a twodimensional single-objective optimization problem of sensing period and sensing interval is proposed under the constraint that the primary users are sufficiently protected. Based on the energy detection sensing algorithm, the mathematical model of joint optimization is given. We present the approach of solving the sensing period and sensing interval optimization problem which makes the maximum utilization of spectrum for the secondary system. Simulation results show that the spectrum utilization increases at first and decreases then as the sensing interval and the sensing period increase. So there exists a set of optimal values of sensing interval and sensing period to maximize the spectrum utilization of the cognitive networks.关键词
认知无线电/检测周期/检测时间/频谱利用率/优化Key words
cognitive radio/ sensing period/ sensing interval/ spectrum utilization/ optimization分类
信息技术与安全科学引用本文复制引用
张传奇,卞荔,朱琦..认知无线电系统中检测时间和检测周期的联合优化[J].南京邮电大学学报（自然科学版）,2011,31(1):16-22,7.基金项目
国家重点基础研究发展计划(973计划)(2007CB310607)、国家自然科学基金(60772062)、国家科技重大专项(2011ZX03001-006-02,2011ZX03005-004-03)资助项目 （973计划）
