论文标题
基于HARQ的预测器天线系统中的电源分配
Power Allocation in HARQ-based Predictor Antenna Systems
论文作者
论文摘要
在这项工作中，我们使用混合自动重复请求（HARQ）研究预测器天线（PA）系统的性能。在这里，PA系统被称为一个系统，在车顶上有两组天线。在此设置中，位于车辆前部的PA可用于预测发射机（CSIT）的通道状态信息，以将数据传输到接收天线（RA）（RA）（RA）（RA）。考虑到空间不匹配，由于车辆的迁移率，我们得出了最佳功率分配的封闭形式表达式以及在不同的中断概率约束下PA系统的最小平均功率。结果是针对不同类型的HARQ协议提出的，我们研究了不同参数对PA系统性能的影响。如我们所示，我们提出的近似方案使我们能够以高准确性分析PA系统。此外，对于不同的车辆速度，我们表明基于HARQ的反馈可以通过数量级来减少PA系统的中断功耗。
In this work, we study the performance of predictor antenna (PA) systems using hybrid automatic repeat request (HARQ). Here, the PA system is referred to as a system with two sets of antennas on the roof of a vehicle. In this setup, the PA positioned in the front of the vehicle can be used to predict the channel state information at the transmitter (CSIT) for data transmission to the receive antenna (RA) that is aligned behind the PA. Considering spatial mismatch, due to the vehicle mobility, we derive closed-form expressions for the optimal power allocation and the minimum average power of the PA systems under different outage probability constraints. The results are presented for different types of HARQ protocols and we study the effect of different parameters on the performance of PA systems. As we show, our proposed approximation scheme enables us to analyze PA systems with high accuracy. Moreover, for different vehicle speeds, we show that HARQ-based feedback can reduce the outage-limited power consumption of PA systems by orders of magnitude.
