A single VSB/QAM/QPSK IC for ATSC and OpenCable/sup TM/ digital terminals

This paper presents a single IC designed for the ATSC-VSB terrestrial receiver and the OpenCable/sup TM/ digital set-top terminal. The IC integrates a VSB/QAM demodulator for in-band broadcasting with a QPSK modem for bi-directional out-of-band cable signaling. It features all-digital synchronization scheme and robust channel equalization technique applied to the common VSB/QAM demodulation. Performance evaluation of the IC has shown that it can handle effectively the severe fading effect encountered in terrestrial broadcasting and the phase noise of cable transmission channels. It is designed with 0.18 /spl mu/m CMOS technology.