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反馈时延对多用户系统性能的影响 被引量:1

Influence of Feedback Delay on the Performance of Multi-user System
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摘要 分析了多用户系统在时变信道模型下用户信息反馈延时对系统性能造成的影响.根据概率论推导了时变信道模型下系统可获得的平均和容量、容量中断概率、系统平均误比特率与反馈延时关系的解析表达式.理论和仿真均证明了在时变信道模型下,系统的反馈延时使多用户系统的性能有很大的下降. The influence of feedback delay of user channel information on the multi-user system performance is investigated. Analytical results of average sum-rate capacity, outage probability and system bit error rate are derived. Both the theoretical results and the Monte Carlo simulations show that over the time-varying channel, the feedback delay of system does heavily affect the system performance.
出处 《应用科学学报》 CAS CSCD 北大核心 2007年第6期564-569,共6页 Journal of Applied Sciences
基金 国家自然科学基金(60496311) 国家"863"高技术研究发展计划(2006AA01Z268)资助项目
关键词 多用户调度 时变信道 多用户分集 反馈时延 multi-user scheduling time-varying channel multi-user diversity feedback delay
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