论文标题
预测天线系统中的速率适应
Rate Adaptation in Predictor Antenna Systems
论文作者
论文摘要
预测器天线（PA）系统被称为一个系统，在车顶上有两组天线，该系统使用位于车辆前部的PAS来预测接收天线（RAS）在PAS后面对齐的通道状态。这封信研究了在存在不匹配问题的情况下PA系统的性能，即，当PA观察到的通道与RA所经历的通道不完全相同时。特别是，我们研究了空间不匹配对通道状态信息估计和速率适应准确性的影响。我们得出瞬时吞吐量，中断概率和吞吐量优化的速率适应性的闭合形式表达式。此外，我们将通道的时间演变考虑在内，并在时间相关的条件下评估系统性能。仿真和分析结果表明，尽管PA辅助自适应速率适应导致了大量的性能提高，但吞吐量和中断概率受到空间不匹配和时间相关性的显着影响。
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.
