A Dynamically Configurable Multi-Format PSK Demodulator for Digital HDTV Using Broadcasting-Satellite

概要

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A complete single chip multi-format Phase Shift Keying (PSK) demodulator ULSI for Japanese BS digital broadcasting is reported. The carrier recovery system shows the pullin range up to +/-5MHz. The clock recovery system cancels the poor group delay characteristic and the orthogonality degradation caused by the analog front end, and improves the BER performance by 0.2dB. Thus the requirement to the analog front end is relaxed. A digital PLL ensures minimum program clock reference jitter in the output data stream, which simplifies jitter management in the succeeding MPEG2 system decoder. It integrates two 8-bit 60MHz ADCs, 58MHz VCO, 1Mbit SRAM and the 450K-gate FEC-demodulator core. Implementation of 1Mbit de-interleaver RAM facilitates the use of a low cost receiver. The 8.8 milion transistor chip occupies the 72mm^2 in a 0.25μm triple-metal CMOS technology
2001-02-01