High Accuracy Channel Estimation With TxID Sequence in ATSC 3.0 SFN
Inter-tower communications networks (ITCN) and wireless in-band distribution links (IDL) reuse the same broadcast spectrum for establishing communications links between transmitter towers and for wireless backhaul by multiplexing the ITCN/IDL signals with the broadcast signal into a frame for transm...
| Autores: | , , , , , , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Recursos: | Universidad del País Vasco |
| Repositorio: | Addi. Archivo Digital para la Docencia y la Investigación |
| OAI Identifier: | oai:addi.ehu.eus:10810/73946 |
| Acesso em linha: | http://hdl.handle.net/10810/73946 |
| Access Level: | acceso abierto |
| Palavra-chave: | ATSC ITCN IDL TxID in-band full-duplex channel estimation CLEAN |
| Resumo: | Inter-tower communications networks (ITCN) and wireless in-band distribution links (IDL) reuse the same broadcast spectrum for establishing communications links between transmitter towers and for wireless backhaul by multiplexing the ITCN/IDL signals with the broadcast signal into a frame for transmission. In a single-frequency networks (SFN) environment, where all the transmitter towers broadcast the same preamble and in-band pilots for improving TV coverage and received signal strength, receiving the desired ITCN/IDL signal from a specific transmitter is challenging with the conventional channel estimation techniques. In the Advanced Television Standard Committee (ATSC) 3.0, one unique transmitter identification (TxID) sequence, a spread sequence overlaid with the preamble signal, is assigned for each transmitter for the purpose of SFN planning and synchronization. By using the TxID sequence, the channel estimation of a specific transmitter becomes feasible. However, the accuracy of existing TxID-based channel estimation is limited due to interferences from the preamble signal and the co-channel TxIDs, as well as the non-orthogonality of the TxID sequence. Several high-accuracy channel estimation schemes based on the TxID sequence are proposed in this paper, which enable IDL and ITCN with very high data rate transmission, e.g., 1024 QAM modulation. |
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