预测天线：一种提高动继电器性能的技术
Predictor Antenna: A Technique to Boost the Performance of Moving Relays
摘要：
在未来的无线系统中，大量的用户可以通过安装在车辆顶部的移动中继（MR）来访问网络。MR的主要挑战之一是快速信道变化，这可能使信道估计及其后续过程变得困难。为了解决这些问题，设计了各种方案，其中预测天线（PA）是一种候选方案。PA设置是指在车辆顶部具有两个（组）天线的系统，其中位于车辆前方的PA被用于预测向PA后方对准的接收天线（RA）进行数据传输所需的信道状态信息。本文介绍了声强系统的概念和潜力。此外，总结现场试验的PA和3GPP尝试（移动）中继，我们比较了不同的PA和非PA方法的性能，车辆通信在城市和农村地区的PA设置回程通过地面或卫星技术，分别。正如我们所展示的，在典型的参数设置和车辆速度下，与最先进的开环方案相比，单天线PA辅助设置可以将MR的回程吞吐量提高高达50%。
英文摘要：
In future wireless systems, a large number of users may access the networks via moving relays (MRs) installed on top of vehicles. One of the main challenges of MRs is rapid channel variation which may make channel estimation, and its following procedures, difficult. To address these issues, various schemes are designed, among which predictor antenna (PA) is a candidate. The PA setup refers to a system with two (sets of) antennas on top of a vehicle, where the PA(s) positioned in front of the vehicle is(are) utilized to predict the channel state information required for data transmission to the receive antennas (RAs) aligned behind the PA. In this paper, we introduce the concept and the potentials of PA systems. Moreover, summarizing the field trials for PAs and the 3GPP attempts on (moving) relays, we compare the performance of different PA and non-PA methods for vehicle communications in both urban and rural areas with the PA setup backhauled through terrestrial or satellite technology, respectively. As we show, with typical parameter settings and vehicle speeds, a single-antenna PA-assisted setup can boost the backhaul throughput of MRs, compared to state-of-the-art open-loop schemes, by up to 50%.
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