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학술대회 Analysis of Channel Capacity for Three-layer Signals in Layered Division Multiplexing System
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김호재, 권순영, 김형남, 배재휘, 김영수, 허남호
International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB) 2019, pp.1-4
19HR2400, 초고품질 UHD (UHQ) 전송 기술 개발, 허남호
A layered division multiplexing (LDM) system provides two or more services over one RF (radio frequency) channel. The LDM system draws much attention as a next generation broadcast communication system because it can provide 3 to 6 dB higher system gain than a time division multiplexing (TDM) or a frequency division multiplexing (FDM) systems. Many studies have been conducted to improve the transmission capacity and the performance of the two-layer LDM system. In order to achieve the additional transmission capacity, however, it is necessary to study terrestrial broadcasting system adopting LDM system with more than two layers. In this paper, we present the feasibility of a three-layer LDM system by analyzing its spectrum efficiency according to signal-to-noise ratios (SNRs) and comparing it with those of TDM / FDM systems.
KSP 제안 키워드
Broadcast communication, Broadcasting system, Channel capacity, Communication system, Frequency division multiplexing, Radio Frequency(RF), Signal-to-Noise, Spectrum efficiency, System gain, Terrestrial Broadcasting, Time division multiplexing