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A Dynamically Configurable Multi-Format PSK Demodulator for Digital HDTV Using Broadcasting-Satellite
Eiji ARITA Takashi FUJIWARA Kin-ichiro NISHIYAMA Akiko MAENO Yasuo MATSUNAMI Masahiko NAKAMURA Hirohisa MACHIDA Shuji MURAKAMI Hiroyuki NAKAYAMA Masahiko YOSHIMOTO
IEICE TRANSACTIONS on Electronics
Publication Date: 2001/02/01
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Low-Power High-Performance VLSI Processors and Technologies)
BS digital, carrier recovery, clock recovery, digital demodulation,
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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 pull-in range up to +/-5 MHz. 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 0.2 dB. 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 60 MHz ADCs, 58 MHz VCO, 1 Mbit SRAM and the 450 K-gate FEC-demodulator core. Implementation of 1 Mbit de-interleaver RAM facilitates the use of a low cost receiver. The 8.8 milion transistor chip occupies the 72 mm2 in a 0.25 µm triple-metal CMOS technology.