arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.05323cs.ITeess.SPmath.IT
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预测天线系统中的速率自适应

Rate Adaptation in Predictor Antenna Systems

Hao Guo, Behrooz Makki, Tommy Svensson

摘要:

预测天线(PA)系统是指在车辆车顶上具有两组天线的系统,其中位于车辆前部的PA用于预测由在PA后面对准的接收天线(RA)观察到的信道状态。这封信研究了PA系统在存在失配问题时的性能,即,当PA观察到的信道与RA经历的信道不完全相同时。特别地,我们研究了空间失配对信道状态信息估计精度和速率自适应的影响。我们推导出封闭形式的瞬时吞吐量,中断概率和吞吐量优化的速率自适应表达式。此外,我们考虑到信道的时间演变,并评估系统的性能在时间相关的条件。仿真和分析结果表明,PA辅助的自适应速率自适应导致相当大的性能改善,吞吐量和中断概率显着影响的空间失配和时间相关性。

英文摘要:

Predictor antenna (PA) system is referred to as a system with two sets of antennas on the roof of a vehicle, where the PAs positioned in the front of the vehicle are used to predict the channel state observed by the receive antennas (RAs) that are aligned behind the PAs. This letter studies the performance of PA systems in the presence of the mismatching problem, i.e., when the channel observed by the PA is not exactly the same as the channel experienced by the RA. Particularly, we study the effect of spatial mismatching on the accuracy of channel state information estimation and rate adaption. We derive closed-form expressions for instantaneous throughput, outage probability, and the throughput-optimized rate adaptation. Also, we take the temporal evolution of the channel into account and evaluate the system performance in temporally-correlated conditions. The simulation and analytical results show that, while PA-assisted adaptive rate adaptation leads to considerable performance improvement, the throughput and the outage probability are remarkably affected by the spatial mismatch and temporal correlations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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