西安电子科技大学学报（自然科学版）2012，Vol.39Issue(1)：1-6,6.DOI:10.3969/j.issn.1001-2400.2012.01.001
认知无线电中接入机会的建模与优化
Modeling and optimization of access opportunity in cognitive radio
摘要
Abstract
This paper proposes jointly optimizing the access opportunity and spectrum sensing to achieve the maximum efficiency of spectrum utilization for the secondary user. In cognitive radio, the opportunistic access interwinded with spectrum sensing plays a key role in determining the performance of the secondary system. However, current related research neglects the relationship between primary user and secondary user in the spatial domain, which leads to incorrect evalution of the quantity of available access opportunity for the secondary user. To deal with this problem, a closed-form function is derived to calculate the secondary medium access probability with regard to the impact of spectrum sensing and user spatial distribution. By using this derived closed-form function, the secondary user can obtain the optimum sensing configuration to ensure the efficient spectrum utilization of the secondary system. Simulation results show the correctness of the closed-form function and the efficiency of the related optimization.关键词
认知无线电/频谱感知/接入机会Key words
cognitive radio/spectrum sensing/access opportunity分类
信息技术与安全科学引用本文复制引用
韩维佳,李建东,姚俊良,李赞..认知无线电中接入机会的建模与优化[J].西安电子科技大学学报（自然科学版）,2012,39(1):1-6,6.基金项目
国家杰出青年科学基金资助项目(60725105) （60725105）
973计划资助课题(2009CB320404) （2009CB320404）
长江学者和创新团队发展计划资助项目(IRT0852) （IRT0852）
863计划课题和国家自然科学基金资助项目(60902032) （60902032）
国家重点实验室专项基金资助项目(ISN02080001) （ISN02080001）
高等学校创新引智计划资助项目(B08038) （B08038）
教育部科学技术研究重点资助项目(107103,K50510010022) （107103,K50510010022）
国家新一代宽带无线移动通信网科技重大专项资助项目(2010ZX03006-002-04) （2010ZX03006-002-04）
