To meet the ever increasing demand for better service quality and availability, the next generation digital TV (DTV) broadcast, a.k.a., the ATSC 3.0, is developed with new capabilities to deliver 4K ultra-high-definition (4K-UHD) services to fixed receivers, robust HD-quality services to mobile receivers, as well as non-broadcast services (e.g., broadband), including Internet of Things (IoT), Connected Vehicles, etc. To realize these capabilities, it becomes necessary to evolve the existing single-transmitter high-power-high-tower (HPHT) network to multi-transmitter low-power-low-tower single-frequency-networks (SFN), which requires installing new transmitters. Each new transmitter needs a feederlink to receive the service data from the broadcast gateway (BG) for transmission. This feederlink contributes to a significant portion of installation and operational costs of the new transmitters. This paper proposes a wireless in-band distribution link (WIDL) technology, where the distribution data is delivered to the newly deployed transmitters from the existing DTV towers wirelessly sharing the same TV band with the broadcast services. The distribution signal is multiplexed with service signal in the same ATSC 3.0 waveform. Layered division multiplexing (LDM) technology is proposed to achieve more efficient transmission of the distribution signal. The WIDL offers better performance and more robust operation than the on-channel repeater (OCR) technologies. More importantly, it offers the possibility of delivering backhaul data for future applications over the DTV infrastructure, such as IoT and connected vehicles. Therefore, the proposed WIDL is one enabling technology to achieve convergence of broadcast services with broadband and other wireless services on the DTV spectrum.

中文翻译：

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在下一代广播系统中为无线带内分配链路使用分层除法复用

为了满足对更好的服务质量和可用性不断增长的需求，开发了下一代数字电视（DTV）广播，也就是ATSC 3.0，具有新功能，可以向固定电视提供4K超高清（4K-UHD）服务接收器，向移动接收器提供的可靠的高清质量服务以及非广播服务（例如宽带），包括物联网（IoT），互联车辆等。为实现这些功能，有必要对现有的单机设备进行改进发射机高功率高塔（HPHT）网络到多发射机低功率低塔单频网络（SFN），这需要安装新的发射机。每个新的发射机都需要一个feederlink，以从广播网关（BG）接收服务数据进行传输。该馈线链路造成了新变送器的安装和运营成本的很大一部分。本文提出了一种无线带内分发链路（WIDL）技术，其中，分发数据从现有的DTV塔中无线传输到与广播服务共享同一电视频段的现有DTV塔中，传送到新部署的发射机。分配信号与服务信号以相同的ATSC 3.0波形复用。提出了分层分割多路复用（LDM）技术，以实现分配信号的更有效传输。与同频中继器（OCR）技术相比，WIDL具有更好的性能和更强大的操作。更重要的是，它提供了通过物联网和联网车辆等DTV基础设施为将来的应用交付回程数据的可能性。所以，