计算机技术与发展2015，Vol.25Issue(12)：186-190,5.DOI:10.3969/j.issn.1673-629X.2015.12.042
认知无线电中基于感知时间和K秩准则的优化
Joint Optimization Based on Sensing Time and K-rank Criteria in Cognitive Radio
摘要
Abstract
Although cooperative spectrum sensing in cognitive radio networks can greatly increase the detection probability,it increases the energy consumption of the system. In order to improve the comprehensive performance of the system,the false probability and the energy efficiency is optimized. In this paper,consider the case where the secondary users cooperatively sense a channel using K-rank criteria ( K-out-of –N fusion rule) to determine the presence of the primary user,so the performance of the system depends on K , N and sensing time (τ) . The process of solving the optimization problem is divided into two stages in this paper. In the first stage,given the sensing time, K and N are optimized by minimizing the false probability. In the next stage,given K and N ,the sensing time is optimized by mini-mizing the energy efficiency. In this paper,two optimization problems are proved to have the optimum value by employing the mathemati-cal derivation. The optimal K , N and τ through the joint iterative algorithm can be obtained. Computer simulations verify the theory analy-sis and show the significant improvement in the performance of system when the parameters are jointly optimized.关键词
认知无线电/频谱感知/感知时间/能量效率Key words
cognitive radio/spectrum sensing/sensing time/energy efficiency分类
信息技术与安全科学引用本文复制引用
李红,齐丽娜..认知无线电中基于感知时间和K秩准则的优化[J].计算机技术与发展,2015,25(12):186-190,5.基金项目
国家"973冶重点基础研究发展计划项目(2013CB329005) （2013CB329005）
国家自然科学基金资助项目(61471201) （61471201）
