This paper theoretically and empirically explores the reliability gain that can be obtained by installing multiple antennas in on-vehicle broadcasting receivers. Analytical derivations reveal that maximal-ratio-combining-based diversity allows a multi-antenna receiver (MR) to achieve significantly better coverage probability than a single-antenna receiver (SR). In particular, the notable MR gains for low-power reception and high-throughput services are highlighted. We also discuss various aspects of mobile MRs, including geometric coverage, volume of the users served, and impact of receiver velocity. To examine the feasibility of MRs in the real world, extensive field experiments were conducted, particularly with on-air ATSC 3.0 broadcast transmissions. Relying on the celebrated erroneous second ratio criterion, MRs with two and four antennas were verified to achieve notable reliability gains over SRs in practice. Furthermore, our results also prove that layered-division multiplexing can cope better with receiver mobility than traditional time-division multiplexing when multiple services are intended in the same radio frequency channel.

中文翻译：

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车载地面广播接收器的多天线分集增益：覆盖概率视角

本文从理论上和经验上探讨了通过在车载广播接收器中安装多个天线可以获得的可靠性增益。分析推导表明，基于最大比率组合的分集允许多天线接收器 (MR) 实现比单天线接收器 (SR) 更好的覆盖概率。特别强调了低功率接收和高吞吐量服务的显着 MR 增益。我们还讨论了移动 MR 的各个方面，包括几何覆盖范围、服务的用户数量以及接收器速度的影响。为了检验 MR 在现实世界中的可行性，进行了广泛的现场实验，特别是空中 ATSC 3.0 广播传输。依靠著名的错误第二比率标准，具有两个和四个天线的 MR 在实践中得到了显着优于 SR 的可靠性增益。此外，我们的结果还证明，当多个服务用于同一射频信道时，分层多路复用比传统的时分多路复用可以更好地应对接收机移动性。