Delays and Resource Analysis for Next-Generation Digital Broadcasting Systems

2015 ◽  
Author(s):  
Hyung-Yoon Seo ◽  
Inyong Kang ◽  
Byungjun Bae ◽  
Hyoungsoo Lim ◽  
Jong-Deok Kim
Keyword(s):  
Next Generation ◽  
Resource Analysis ◽  
Digital Broadcasting

scholarly journals Enhanced LDM for Next-Generation Digital Broadcasting Transmission

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1716
Author(s):  
Xianzheng Deng ◽  
Xin Bian ◽  
Mingqi Li
Keyword(s):  
Fading Channels ◽  
Data Stream ◽  
Signal To Noise Ratio ◽  
Additive White Gaussian Noise ◽  
Core Layer ◽  
Mobile Services ◽  
Parity Check ◽  
Next Generation ◽  
Frequency Domain Multiplexing ◽  
Digital Broadcasting

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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