High-speed QPSK/OQPSK burst modem VLSIC

Kiyoshi Kobayashi, Yoichi Matsumoto, Tetsu Sakata, Kazuhiko Seki, Shuzo Kato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


High speed QPSK/OQPSK full digital burst modem VLSICs have been developed. The demodulator VLSIC employs a reverse-modulation scheme for carrier recovery and an interpolation scheme coupled with a pulse shape filter for bit timing recovery to recover high speed burst mode signals. A wave forming filter for reverse-modulation of OQPSK signals is proposed to increase extracted carrier signal-to-noise ratio. The proposed full digital burst modem VLSICs achieve a fast carrier/clock acquisition performance with a very low carrier slipping rate of 1 × 10-8 event/symbol at an Eb/No of 4dB with short preamble words less than 100 symbols. The developed CMOS VLSICs operates up to 60Mbit/s without an analog clock VCO, in burst mode and for QPSK and OQPSK signals, which conventional methods cannot achieve.

Original languageEnglish
Title of host publicationIEEE International Conference on Communications
PublisherPubl by IEEE
Number of pages5
ISBN (Print)0780309510
Publication statusPublished - 1993
EventProceedings of the IEEE International Conference on Communications '93 - Geneva, Switz
Duration: 1993 May 231993 May 26

Publication series

NameIEEE International Conference on Communications


OtherProceedings of the IEEE International Conference on Communications '93
CityGeneva, Switz

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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