认知无线电网络中非授权用户吞吐量性能研究  

A study of the throughput performance of secondary users of the cognitive radio

作　　者：冯治恒[1] 王时龙[1] 雷松[1] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400030

出　　处：《高技术通讯》2011年第7期764-769,共6页Chinese High Technology Letters

基　　金：国家杰出青年科学基金（50925518）和博士点基金（20060611010）资助项目.

摘　　要：面向认知无线电技术领域，通过开展授权用户（PU）行为模式和非授权用户（SU）吞吐量研究，论证了Pu空闲时间分布状态和冲突概率约束对SU吞吐量性能的影响。同时，通过分析su频谱接入策略模型，在su精确感知PU空闲时间分布状态的条件下求出SU最大吞吐量，得出在已知Pu空闲时间分布规律条件下，SU最大吞吐量随着冲突概率的增大而增大的理论结果。通过与仿真结果的比较，验证了理论结果的正确性。The paper studies the impacts of the idle time distribution and the packet collision probability constraint of primary users （PU） of cognitive radio networks on the throughput performance of secondary users （SU） based on the PU behaviour pattern investigation and the SU＇ s throughput analysis. Meanwhile, this paper presents the SU optimum spectrum access strategy model and calculates the maximum throughout of SU under the condition of perfect sensing the PU idle time distribution. The simulation result was verified by comparing the theoretical result. The conclusion is that the maximum throughout of SU increases as the packet collision probability constraint increases.

关 键 词：认知无线电 吞吐量性能 空闲时间分布 频谱接入策略 

分 类 号：TN929.11[电子电信—通信与信息系统]