Fully digital burst modem for satellite multimedia communication systems

Kiyoshi Kobayashi, Tetsu Sakata, Yoichi Matsumoto, Shuji Kubota

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This paper presents fully digital high speed (17.6 Mb/s) burst modem for Offset Quadrature Phase Shift Keying (OQPSK) which employs novel digital modem VLSICs. The modulator VLSIC directly generates modulated intermediate frequency (IF) signals in a fully digitalized manner. A newly proposed digital reverse-modulation and pre-filtered carrier filter-limiter scheme realizes low power consumption and stable operation in a low Eb/No condition. The demodulator VLSIC also achieves fast bit-timing acquisition in burst mode. Moreover it supports stable initial burst acquisition by a novel automatic frequency control (AFC) acquisition detector and a digital burst detector. A digital burst automatic gain control (AGC) compensates burst-to-burst level differences without analog circuits. Performance evaluation results show that the new modem achieves satisfactory biterror-rate performance in severe environments. The developed modem has been employed in a commercial portable earth station for ISDN services and reduces the hardware size to one third that of the conventional one.

Original languageEnglish
Pages (from-to)8-15
Number of pages8
JournalIEICE Transactions on Communications
VolumeE80-B
Issue number1
Publication statusPublished - 1997
Externally publishedYes

Fingerprint

Modems
Communication systems
Satellites
Detectors
Demodulators
Voice/data communication systems
Quadrature phase shift keying
Gain control
Limiters
Analog circuits
Modulators
Electric power utilization
Earth (planet)
Modulation
Hardware

Keywords

  • Digital burst modem
  • Satellite communication
  • TDMA
  • VLSIC

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

Cite this

Fully digital burst modem for satellite multimedia communication systems. / Kobayashi, Kiyoshi; Sakata, Tetsu; Matsumoto, Yoichi; Kubota, Shuji.

In: IEICE Transactions on Communications, Vol. E80-B, No. 1, 1997, p. 8-15.

Research output: Contribution to journalArticle

Kobayashi, Kiyoshi ; Sakata, Tetsu ; Matsumoto, Yoichi ; Kubota, Shuji. / Fully digital burst modem for satellite multimedia communication systems. In: IEICE Transactions on Communications. 1997 ; Vol. E80-B, No. 1. pp. 8-15.
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