Layered Division Multiplexing for ATSC 3.0: Implementation and Memory Use Aspects

Lee, Jae-Young; Park, Sung Ik; Kwon, Soon-Bark; Lim, Bo-Mi; Ahn, Sungjun; Hur, Namho; Kim, Heung Mook; Kim, Jeongchang

doi:10.1109/tbc.2019.2897750

Cited by 23 publications

(15 citation statements)

References 18 publications

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“…Therefore, the most efficient value of α for the LDM system is identified by maximizing the sum of normalized channel capacities. The channel capacity of multi-PLP transmission schemes has been studied in the literature [5,18,25,26]. Efficient channel capacity allocation is necessary for providing various services, such as breaking news in disaster situations, UHD broadcasting services, and mobile HD services [3][4][5][6][7].…”

Section: Research Backgroundmentioning

confidence: 99%

“…The TDM system transmits using a time ratio divided into three from the total duration [5,18]. The LTDM and TLDM systems combine TDM and LDM principles in a 3-PLP transmission scheme [5,26]. In literature, investigations have shown that performance analyses for particular injection levels and time ratios demonstrate their superiority over TDM, similar to the 2-PLP system [5,26].…”

Section: Research Backgroundmentioning

confidence: 99%

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Analysis on Fairness and Efficiency of the 3-PLP LDM System Using a Normalized Channel Capacity

Kim,

Kwon,

Bae

et al. 2023

Electronics

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This article presents a novel approach to investigate efficient resource allocation in the layered division multiplexing (LDM) system, a key technology in next-generation broadcasting systems. The LDM system provides diverse services, resulting in different channel capacities for each service, unlike the conventional non-orthogonal multiple access scheme that aims for equal channel capacity among users. To achieve efficient resource allocation among services, we proposed a new method that normalizes the channel capacities allocated to different services while maintaining high fairness. Our proposed method involves normalizing the channel capacities of each service and finding the point where the sum of normalized channel capacities is maximized. This point can be obtained using the Lagrange multiplier method, ensuring a high normalized fairness index. Through simulations, we confirmed that the proposed approach maintains high fairness in the LDM system and achieves the highest normalized channel capacities compared to other transmission techniques. These findings provide valuable insights into resource allocation strategies for the LDM system, enabling a fair comparison of efficiency and performance within a multi-service environment.

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Section: Research Backgroundmentioning

confidence: 99%

Section: Research Backgroundmentioning

confidence: 99%

Analysis on Fairness and Efficiency of the 3-PLP LDM System Using a Normalized Channel Capacity

Kim,

Kwon,

Bae

et al. 2023

Electronics

Self Cite

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“…The ATSC 3.0 physical layer standard only uses a two-layer LDM signal structure [ 27 ]. The specific implementation has been described in detail in [ 3 ].…”

Section: Overview Of the Traditional Ldm Schemementioning

confidence: 99%

“…In July 2015, China’s next-generation digital TV broadcasting system digital terrestrial television multimedia broadcasting-advanced (DTMB-A) was adopted by the International Telecommunication Union (ITU) [ 2 ]. In June 2017, the physical layer protocol (A/322) of the Advanced Television Systems Committee 3.0 (ATSC 3.0) was approved as the final standard [ 3 , 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced LDM for Next-Generation Digital Broadcasting Transmission

Deng

Bian

2021

Sensors

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In the traditional layered division multiplexing (LDM) system, by simply adjusting the injection level, the reception performance of the core layer (CL) mobile services will be decreased significantly, resulting in the deterioration of system coverage performance. Thus, it is necessary to improve the performance of the enhanced layer (EL) service reception without affecting the reception threshold of CL service. To achieve this, in this paper, an enhanced LDM (En-LDM) scheme that supports multi-service transmission is proposed for the next-generation broadcasting network. In this scheme, at the transmitter end, part of the low-density parity-check (LDPC) coded data stream of fixed service conveyed in the EL will be extracted out through puncturing, and then, it will be transmitted over the CL of the LDM signal along with the original CL data in a frequency domain multiplexing (FDM) manner. At the receiving end, the punctured data of the EL fixed service will be recovered with a higher signal-to-noise ratio (SNR). Compared to the traditional LDM scheme, the proposed En-LDM scheme can significantly improve the reception performance of fixed services without decreasing the SNR threshold of mobile services. Moreover, the En-LDM can achieve a higher channel capacity than that of the traditional LDM for both the fixed services and the overall services. The superiority of the proposed En-LDM scheme over the traditional LDM scheme is validated by the simulation under the additive white Gaussian noise (AWGN) and fading channels.

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“…The modern ATSC 3.0 recommends the use of the LDM modulation technique. Therefore, several articles were published with studies concerning the capacity of LDM in ATSC 3.0 [39], memory use aspects for the LDM technique in the system [40], MIMO schemes utilization [41], field tests [42], studies about efficient schemes for decoding and LDPC application [43][44][45], performance analysis for mobile services [46], among others.…”

Section: Related Workmentioning

confidence: 99%

Implementation of a 3-layer LDM Broadcast System Backward-compatible with ISDB-TB

Rabaca¹,

Jerji²,

Akamine³

2021

RADIOENGINEERING

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This paper presents an implementation of a 3layer transmitter and receiver using Layer Division Multiplexing (LDM), in Software Defined Radio (SDR). The main idea of this work is to show another point of view of the traditional LDM technique that uses two layers. This proposal uses an attenuated intermediate layer, called Middle Layer (ML), between the highest power layer, called Upper Layer (UL), and the most attenuated layer, called Lower Layer (LL). The UL is fully compatible with the Integrated Services Digital Broadcasting Terrestrial -Version B (ISDB-T B ). The ML, with greater robustness, and LL, with higher capacity, use powerful channel coders, a custom frame size and an adapted bit interleaver. With the use of this modified LDM, it is possible to develop a system with different robustness levels between layers and with lower layers that complement each other, to achieve bit rates that allow for the deployment of High Definition Television (HDTV), in the UL, and Ultra High Definition Television (UHDTV), in the ML and LL. In addition, a system was also implemented with three layers, but with the ML with higher capacity and the LL with greater robustness. The performance of the 3-layer system was compared with the 2-layer LDM technique and there was an improvement in the system modularity, without a decrease in the bit rate.

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Layered Division Multiplexing for ATSC 3.0: Implementation and Memory Use Aspects

Cited by 23 publications

References 18 publications

Analysis on Fairness and Efficiency of the 3-PLP LDM System Using a Normalized Channel Capacity

Analysis on Fairness and Efficiency of the 3-PLP LDM System Using a Normalized Channel Capacity

Enhanced LDM for Next-Generation Digital Broadcasting Transmission

Implementation of a 3-layer LDM Broadcast System Backward-compatible with ISDB-TB

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