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학술대회 Performance Evaluation of Layer Division Multiplexing (LDM) Combined with Time Frequency Slicing (TFS)
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Eduardo Garro, Jordi Joan Gimenez, David Gomez-Barquero, 박성익
International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB) 2015, pp.1-5
15MR3300, (통합)융합형 실감방송 서비스 및 전송 기술 개발, 허남호
The Advanced Television System Committee (ATSC) is currently developing the next-generation U.S. Digital Terrestrial Television (DTT) standard, known as ATSC 3.0. Two disruptive technologies for the physical layer are being evaluated, Layer Division Multiplexing (LDM) and Time Frequency Slicing (TFS). LDM consist in the transmission of a signal composed of two independent signals (layers) which are superimposed together at different power levels. These two layer can be configured with the desired robustness and capacity. LDM enables the efficient provision of services addressed to mobile and fixed reception in a more efficient way than the classical Frequency Division Multiplexing (FDM) and Time Division Multiplexing (TDM) since full bandwidth and transmission time are used in both layers. However, practical operation is restricted due to several implementation constraints such as the use of common parameters and transmitter blocks for both layers (e.g. a common time interleaver). The use of TFS allows for an improved frequency diversity by the distribution of the service data across multiple Radio Frequency (RF) channels instead of using a single RF channel. The paper investigates the potential gains provided by the increased frequency diversity with TFS in conjunction with LDM.
KSP 제안 키워드
ATSC 3.0, Digital Terrestrial Television, Disruptive technologies, Frequency division multiplexing, Full Bandwidth, Layer Division Multiplexing(LDM), Next-generation, Performance evaluation, Physical Layer, Power Levels, Service data