ADAPTABLE/VARIABLE TYPE MODULATING AND DEMODULATING APPARATUS IN A DIGITAL CABLE TRANSCEIVING SYSTEM, CAPABLE OF MODULATING/DEMODULATING PARTIAL DATA AT A PHYSICAL LAYER USING A LOW DENSITY PARITY CHECK ERROR CORRECTION METHOD

摘要

PURPOSE: An adaptable/variable type modulating and demodulating apparatus in a digital cable transceiving system is provided to enhance channel equalization performance occurring in higher-order modulation and demodulation.;CONSTITUTION: A QAM(Quadrature Amplitude Modulation) unit(313) determines a symbol using a non coding bit group. A convolutional interleaver(315) convolutionally interleaves the determined symbol. A training sequence symbol generating unit(317) outputs one predetermined training sequence symbol.;COPYRIGHT KIPO 2010