摘要
提出将贝叶斯风险作为认知无线电系统一种新的评价标准。在这种评价标准中,考虑了主用户频谱使用率、判决结果代价等诸多因素,较传统的系统评价标准考虑更全面。针对单用户系统和多用户系统,分析了在新的评价标准下,系统如何才能获得最佳系统检测性能。仿真结果表明:单用户系统通过选择最佳判决门限,多用户系统通过选择最佳决策,可以获得最佳系统检测性能。
In this paper,the Bayes risk is proposed as a new evaluation criteria of cognitive radio systems.The evaluation criteria,in which the spectrum utilization of primary users,the cost of judgments and other factors are considered,is more comprehensive than the traditional one.For single-user systems and multi-user systems,we analyze how these systems can get the best detection performance of systems in the new evaluation criteria.Simulation results show that： a single-user system can choose the the best decision threshold,and a multi-user system can select the best decision,so that we can get the best detection performance of system.
出处
《苏州大学学报（工科版）》
CAS
2011年第1期6-11,共6页
Journal of Soochow University Engineering Science Edition (Bimonthly)
基金
国家自然科学基金资助项目(编号60872003)
博士学科点专项科研基金资助项目(编号20093201110005)
关键词
贝叶斯风险
评价标准
系统检测性能
最佳判决门限
最佳决策
the Bayes risk
the evaluation criteria
detection performance of system
the best decision threshold
the best decision
