摘要
研究了认知无线电系统中最大化认知用户吞吐量的多信道检测传输方案,分别设计了信道状态信息不可获取和信道状态信息可获取情况下的最优检测传输方案设计,并综合分析了各信道频谱检测的虚警,漏检以及检测时长对认知用户吞吐量的影响。在信道状态信息不可获取时,认知用户需要在每一时隙开始时,就决定需要检测的信道集合以及相应的检测时长。而在信道状态信息可获取情况下,提出了自适应检测传输方案。该方案在每个信道检测完成之后,认知用户可以根据已知的检测结果以及信道状态信息来不断调整检测传输策略。仿真结果显示,该自适应检测传输方案能有效的提高认知用户的吞吐量。
The multi-channel sensing-transmission scheme design for maximizing the throughput in cognitive radio is re- searched. The optimal sensing-transmission scheme is designed in two cases： with channel state information （CSI） and without CSI. The factors which influence the throughput of cognitive radio user are considered, such as the false alarm, miss detection and sensing duration of each channel. When the CSI is unattainable, the cognitive radio user should decide the sensing channel set and the respective sensing duration of each channel at every start of time slot. When the CSIs are attainable, the adaptive sensing-transmission scheme is proposed, which can adaptively adjusts the sensing-transmission strategy according to the sensing results and CSIs of sensed channels. The simulation results show that this adaptive sensing-transmission scheme can effectively improve the throughput of cognitive radio users.
出处
《现代电子技术》
2013年第19期40-45,共6页
Modern Electronics Technique
基金
国家自然科学基金资助项目(61071102)
"973"项目(2009CB320405)
国家科技重大专项课题资助项目(2010ZX03005-002)
关键词
认知无线电
频谱检测
吞吐量
自适应检测一传输
cognitive radio
spectrum sensing
throughput
adaptive sensing-transmission
