Sang-Jung Ra

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In this paper, we present an analysis of implemented QAM modulator in HFC network. It may be through the 256 QAM modulation using a single carrier to transmit data up to 38.8 Mbps. 64/256-QaM modulator based on ITU-T J.83 Annex B is implemented as a board which includes field programmable gate arrays (FPGAs). Implemented Modulator consists of RS-TCM(More)
In this paper, we present the simulation results of FFO(fractional frequency offset) influences on PLC preamble correlation based PLC synchronization in DOCSIS 3.1 Downstream. FFO makes inter-carrier interferences and breaks orthogonality in OFDM based transmission system. It degrades the performance of OFDM by reducing SNR(signal to noise ratio). The(More)
We present a study result for common phase rotation compensation based on DSP and FPGA for coaxial transmission system in the HFC network. Recently, most of internet networks have HFC configuration. For 10Gbps speed in the HFC network, coaxial networks should support 10Gbps. For this, DVB-C2, DOCSIS 3.1, EPoC are developed. Especially, DVB-C2 attracts(More)
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