Reception Complexity and Power Consumption reduction with ASK in 3layer LDM In this paper a 3layer layer division multiplexing based on amplitude shift keying(ASK) is proposed. The proposed 3layer LDM modulation inserts a new ASK modulated signal between core layer and enhanced layer in 2layer LDM in ATSC 3.0 system. Thus the proposed method has advantages in the reception of the newly added ASK signal, which has a simple signal processing in removing the upper layer QPSK signal from the received 3layer LDM signal using the known magnitude information of QPSK. Therefore, the receiver of the proposed 3layer LDM method is to have advantages in reducing the hardware complexities and the power consumptions. Therefore, it has a high possibility to be applied for a mobile broadcasting to handheld mobile devices with a limited battery power.

Analysis of Channel Capacity for Threelayer Signals in Layered Division Multiplexing System 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 twolayer 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 threelayer LDM system by analyzing its spectrum efficiency according to signaltonoise ratios (SNRs) and comparing it with those of TDM  FDM systems.