论文标题
基于HARQ的预测器天线系统的延迟限制平均速率
On Delay-limited Average Rate of HARQ-based 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。在这项工作中，我们研究了空间不匹配对渠道状态信息估计准确性的影响，并分析了基于基于的PA系统的混合自动重复请求（HARQ）的延迟限制的平均值。我们考虑可变的长度增量冗余（INR）HARQ协议，并根据最大延迟约束的最大平均速率得出封闭形式的表达式。此外，我们研究了不同参数的影响，例如车速，天线距离和速率分配对系统性能的影响。结果表明，与开环情况相比，我们提出的PA-HARQ方案可大大提高延迟限制的平均速率。
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. In this work, we study the effect of spatial mismatch on the accuracy of channel state information estimation, and analyze the delay-constrained average rate of hybrid automatic repeat request (HARQ)-based PA systems. We consider variable-length incremental redundancy (INR) HARQ protocol, and derive a closed-form expression for the maximum average rate subject to a maximum delay constraint. Moreover, we study the effect of different parameters such as the vehicle speed, the antenna distance and the rate allocation on the system performance. The results indicate that, compared to the open-loop case, the delay-limited average rate is considerably improved with our proposed PA-HARQ scheme.
