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In this paper, we propose a bandwidth scalability for digital terrestrial broadcasting, which uses a wide bandwidth of multiples of the conventional bandwidth 6/7/8 MHz. Wide bandwidth broadcasting uses wider bandwidth than the legacy 6/7/8 MHz and may have advantages in reducing network installation cost and operation cost. By allocating bandwidths not to interfere with neighboring coverage, it does...
ATSC 3.0 is well designed based on the concept of all-IP to weave broadcast and broadband together. In order to discover the services or contents delivered through the broadband, ATSC 3.0 defines specific signaling, electronic service guide and automatic content recognition specification. In the case of signaling, the detailed discovering information is provided in the service layer signaling with...
Advanced Television Systems Committee (ATSC) 3.0, which is the new international standard for next generation broadcasting, allows to deliver multiple services with different reception conditions in a single RF channel. In the physical layer standard of ATSC 3.0, two kind of multiplexing schemes are adopted: orthogonal schemes including traditional time division multiplexing (TDM) and frequency division...
3GPP is currently studying the improvement on the LTE eMBMS system to provide more capabilities and flexibilties on delivering multicast/broadcast services using the LTE infrastructure. This paper investigates the performance of an improved LTE eMBMS system using layered-division-multiplexing (LDM) technology and longer cyclic prefix (CP). The link-layer performance of using two-layer LDM in eMBMS...
In the ATSC 3.0 PHY layer standard, a Transmitter Identification (TxID) signal is defined in order to provide the identification of an ATSC 3.0 transmitter. For efficient use of spectrum and quality of service improvement, single frequency network (SFN) where all transmitters share a single RF channel is often implemented. The recently developed ATSC 3.0 physical layer standard has been designed to...
Since FTN signaling uses greater symbol rate than Nyquist rate, the FTN signaling offers higher spectral efficiency than that of Nyquist signaling. However, ISI is derived from the non-orthogonality of FTN signaling. The ISI leads to an increase of the envelope fluctuations. Consequently, high PAPR occurs in the FTN signaling. In the satellite communication link, the high PAPR causes performance limitation...
The ATSC 3.0 next generation digital TV standard adopts state-of-the-art coding and modulation, as well as the new Layered Division Multiplexing (LDM) technology in addition to the traditional TDM/FDM. It is a very flexible system capable of combining different services in one RF channel with different robustness and reception conditions. The coverage for ATSC 3.0 is very different from the legacy...
In this paper, we present an efficient transmission method of multiple broadcasting services using Layered Division Multiplexing (LDM) and Scalable High Efficiency Video Coding (SHVC) for the next generation terrestrial digital broadcasting such as Advanced Television Systems Committee (ATSC) 3.0. Based on a two-layer LDM technology, each Physical Layer Pipe (PLP) carries each of Base Layer and Enhancement...
In this paper, we propose an efficient FFO(fractional frequency offset) estimation method for OFDM systems with RP(Roll-off period). RP is used to transmit more subcarriers in a limited bandwidth. Because neighboring OFDM symbols overlap in RP region, RP makes noises in CP(cyclic prefix) and degrades FFO estimation when Beek's method is used. The proposed method estimates FFO based on the Beek's method...
The frame of ATSC 3.0 consists of bootstrap, preamble and subframe in order, and the bootstrap signal can be used for initial synchronizations at the receiver. Also, it contains the signaling information needed for decoding of the preamble. Therefore, the bootstrap signals have to be reliably decoded even under a poor condition. In this paper, we derive the maximum-likelihood (ML) decision rule for...
Delivering local content in terrestrial digital TV (DTV) single-frequency-networks (SFNs) is of great interest to broadcasters, which can support business cases such as local news, location-based applications and targeted advertisements. The recently adopted Layered-Division-Multiplexing (LDM) technology offers a new solution to achieve high-throughput local content insertion from any transmitters,...
In ATSC 3.0 physical layer standard, a layered division multiplexing (LDM) scheme has newly accepted as one of the multiplexing schemes in order to improve the reception performance when multiple broadcasting contents are simultaneously delivered through a single RF channel. This paper presents comparison results of LDM and time division multiplexing (TDM) schemes under fixed reception environments,...
In the ATSC 3.0 PHY layer standard, a transmitter identification (TxID) signal is defined in order to provide the identification of an ATSC 3.0 transmitter. TxID signal can also be used to find the co-channel and adjacent interference signals, to assist accurate location finding calculation, and to obtain the channel estimation for each transmitter, which can help local service (e.g., targeted advertisement)...
The main purpose of the FTN signaling is to increase data rate without using additional bandwidth or transmission power. To analyze system characteristics of the FTN-based system, such as system capacity, there have been some studies on the power spectral density (PSD) of the FTN signaling. The present study analyzes the PSD characteristics of a discrete-time model of the FTN signaling, and compares...
This paper proposes physical layer security technology based on non-orthogonal FTN signaling for premium services in advanced satellite digital video broadcasting system. Because the FTN signaling adopts greater symbol rate than Nyquist rate, the FTN signaling is corrupted by unavoidable ISI. The proposed technique encodes the ISI factor of FTN signaling for transmission signal. The encoded ISI factor...
In this paper, we present the simulation results of FFO(fractional frequency offset) influences on PLC preamble correlation based PLC synchronization in DOCSIS 3.1 Downstream. FFO makes inter-carrier interferences and breaks orthogonality in OFDM based transmission system. It degrades the performance of OFDM by reducing SNR(signal to noise ratio). The performance of PLC synchronization is influenced...
For the performance improvement of DVB-S2 satellite broadcasting system, DVB-S2X standard has been developed. DVB-S2X has considered a variety of baseband modulations and LDPC code rates. And for the spectral efficiency enhancement in satellite broadcasting, FTN signaling has been studied in recent years. FTN signaling transmits symbols at rates so faster than Nyquist rate that ISI is inevitable....
In this paper, we present an analysis of implemented QAM modulator in HFC network. It may be through the 256 QAM modulation using a single carrier to transmit data up to 38.8 Mbps. 64/256-QaM modulator based on ITU-T J.83 Annex B is implemented as a board which includes field programmable gate arrays (FPGAs). Implemented Modulator consists of RS-TCM encoder, a QAM modulator and Digital to analog converter...
In this paper, we propose an integer frequency offset estimation and compensation method based on PLC preamble correlation in DOCSIS 3.1 Downstream system. The proposed method finds out the PLC preamble subcarrier location recovered from PLC data and the one obtained from PLC preamble correlation. We showed the performance of PLC preamble detection in the received signal through the maximum value...
In this paper, we propose a PLC synchronization method based on the correlation of PLC Preamble subcarrier in DOCSIS 3.1 Downstream system. The proposed method aims to find out the starting point of PLC Preamble OFDM symbol and to present the reference point for the allocation of pilot pattern used for channel estimation. We showed the performance of the proposed method through the maximum value detection...
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