Advanced Television Systems Committee (ATSC) 3.0, a recently developed terrestrial broadcasting standard, supports a Single Frequency Network (SFN), which extends service coverage and enhances received field strength without additional frequency resources. In SFN, multiple transmitters emit identical ATSC 3.0 broadcasting signals, which may cause constructive or destructive interference on a receiver side. The worst situation occurs when two signals from different transmitters are received with the opposite phase and similar power within a sample time, causing the cancellation of the received signal. In order to prevent such signal cancellation, ATSC 3.0 adopted transmitter diversity code filter sets (TDCFS), which is a frequency domain pre-distortion scheme to minimize cross-correlation among multiple transmitter signals in SFN. This paper sets up an ATSC 3.0 SFN consisting of two transmitter sites, transmitting high definition (HD) for mobile service and 4K ultra high definition (UHD) for fixed service. Layered division multiplexing (LDM) and time division multiplexing (TDM) are used to simulcast the two services with different robustness in the same radio frequency (RF) channel. Then, performance is evaluated using a threshold of visibility (ToV) and a successful reception rate. The time and frequency channel responses are changed at the same reception area when TDCFS is applied so the results show that reception performance is improved in the worst situation in SFN.

中文翻译：

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ATSC 3.0 单频网络中发射分集编码滤波器组的现场评估


先进电视系统委员会 (ATSC) 3.0 是最近开发的地面广播标准，支持单频网络 (SFN)，无需额外的频率资源即可扩展服务覆盖范围并增强接收场强。在SFN中，多个发射机发射相同的ATSC 3.0广播信号，这可能会在接收机侧造成相长或相消性干扰。最糟糕的情况是在一个采样时间内接收到来自不同发射机的两个具有相反相位和相似功率的信号，从而导致接收信号相抵消。为了防止这种信号抵消，ATSC 3.0采用了发射机分集编码滤波器组（TDCFS），这是一种频域预失真方案，可最大限度地减少SFN中多个发射机信号之间的互相关。本文建立了一个由两个发射站点组成的ATSC 3.0 SFN，传输用于移动服务的高清（HD）和用于固定服务的4K超高清（UHD）。层分复用（LDM）和时分复用（TDM）用于在同一射频（RF）信道中同播两种鲁棒性不同的业务。然后，使用可见度阈值 (ToV) 和成功接收率来评估性能。应用 TDCFS 时，同一接收区域的时间和频率信道响应发生变化，因此结果表明，在 SFN 的最差情况下，接收性能得到改善。