认知无线网络中基于节点功耗和频带利用率的感知时隙优化算法  

Power Consumption and Bandwidth Efficiency based Sensing Time Optimization Algorithm in Cognitive Radio Network

作　　者：季薇[1,2] 胡延成[1,2] 杨震[1,2] 郑宝玉[1,2] 

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003 [2]南京邮电大学"宽带无线通信与传感网技术"教育部重点实验室,江苏南京210003

出　　处：《信号处理》2014年第11期1401-1406,共6页Journal of Signal Processing

基　　金：国家863项目(2009AA01Z241);江苏省自然科学基金青年基金项目(BK20140885);江苏省博士后科研资助计划(1401045C);国家自然科学基金面上项目(61471200)

摘　　要：本文主要研究感知时隙对次用户节点功耗和频带利用率的影响,在保证检测性能的前提下,分析它们之间的折中关系,通过构造新的指标函数来衡量不同系统对次用户节点功耗和频带利用率的要求,并引入调节因子以便根据系统的不同需求选择不同的感知时隙。仿真结果表明,次用户节点功耗和频带利用率均是感知时隙的递减函数,在给定调节因子的情况下,总存在一个最优的感知时隙能够使得指标函数达到最小。This paper mainly focuses on the influence of sensing time on power consumption and bandwidth efficiency of secondary users. The trade-off among above three parameters is studied in this paper. A new index function is constructed to measure the requirement for secondary users＇ power consumption and bandwidth efficiency in different systems. And adjusting factors are introduced to choose an appropriate sensing time for different systems. Simulation results show that secondary users＇ power consumption and bandwidth efficiency are decreasing function of sensing time and there is an optimal sensing time to achieve the smallest index function for the given adjusting factor.

关 键 词：认知无线电 频谱感知 感知时隙 功率消耗 频带利用率 

分 类 号：TN929.5[电子电信—通信与信息系统]