IEICE TRANSACTIONS on Communications
Fully Digital Burst Modem for Satellite Multimedia Communication Systems
Summary :
This paper presents fully digital high speed (17.6Mb/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 circutits. Performance evaluation results show that the new modem achieves satisfactory bit-error-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.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E80-B No.1 pp.8-15
- Publication Date
- 1997/01/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- Special Section PAPER (Special Issue on Advances in Satellite Communications toward Multimedia Era)
- Category
- Modem and Coding
Authors
Keyword
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Kiyoshi KOBAYASHI, Tetsu SAKATA, Yoichi MATSUMOTO, Shuji KUBOTA, "Fully Digital Burst Modem for Satellite Multimedia Communication Systems" in IEICE TRANSACTIONS on Communications,
vol. E80-B, no. 1, pp. 8-15, January 1997, doi: .
Abstract: This paper presents fully digital high speed (17.6Mb/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 circutits. Performance evaluation results show that the new modem achieves satisfactory bit-error-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.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e80-b_1_8/_p
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@ARTICLE{e80-b_1_8,
author={Kiyoshi KOBAYASHI, Tetsu SAKATA, Yoichi MATSUMOTO, Shuji KUBOTA, },
journal={IEICE TRANSACTIONS on Communications},
title={Fully Digital Burst Modem for Satellite Multimedia Communication Systems},
year={1997},
volume={E80-B},
number={1},
pages={8-15},
abstract={This paper presents fully digital high speed (17.6Mb/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 circutits. Performance evaluation results show that the new modem achieves satisfactory bit-error-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.},
keywords={},
doi={},
ISSN={},
month={January},}
Copy
TY - JOUR
TI - Fully Digital Burst Modem for Satellite Multimedia Communication Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 8
EP - 15
AU - Kiyoshi KOBAYASHI
AU - Tetsu SAKATA
AU - Yoichi MATSUMOTO
AU - Shuji KUBOTA
PY - 1997
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E80-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 1997
AB - This paper presents fully digital high speed (17.6Mb/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 circutits. Performance evaluation results show that the new modem achieves satisfactory bit-error-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.
ER -
English
