摘要
在保证授权用户服务质量(QoS)和认知用户峰值功率限制的前提下,推导出高信噪比时放大转发中继选择(SAF)协议、解码转发中继选择(SDF)协议和混合中继选择协议(HPRS)下认知中继系统中断概率的近似表达式。Monte Carlo仿真验证了三种协议下中断概率近似表达式的合理性,理论和仿真结果表明,三种协议的中断概率与干扰限制条件和认知用户峰值功率密切相关,且HPRS中断性能要优于SAF和SDF。
An approximate outage probability formulation were derived for amplify-and-forward with relay selection (SAF), de- code-and-forward with relay selection (SDF) protocol and hybrid protocol with relay selection (HPRS) on the premise of guarantee primary user quality of service (QoS) and limit of maximal power in cognitive user. By Monte Carlo simulation, the rationality of the approximate outage probability formulation is validated. Theoretical analysis and simulation results show that the outage probabili- ty of three cooperative protocols is closely related to interference limit and maximal power in cognitive user. Meanwhile, the three protocols can achieve the full space diversity and the I-IPRS outperforms both the SAF and SDF in outage performance.
出处
《电子技术应用》
北大核心
2012年第10期96-98,共3页
Application of Electronic Technique
关键词
认知无线电
中继选择
功率受限
中断概率
合作分集
cognitive radio
relay selection
power constrained
outage probability
cooperative diversity