FEC COMBINED BURST-MODEM FOR BUSINESS SATELLITE COMMUNICATIONS USE.

K. Murakami*, M. Miyake, T. Fuji, Y. Moritani, T. Fujino, K. Ito, Fumio Takahata

*この研究の対応する著者

研究成果

抄録

The authors recently developed two types of FEC (forward error correction) combined modems both applicable to low-data-rate and intermediate-data-rate TDMA international satellite communications. Each FEC combined modem consists of a QPSK (quadrature phase-shift keyed) modem, a convolutional encoder, and a Viterbi decoder. Both modems are designed taking into consideration the fast acquisition of the carrier and bit timing and the low cycle slipping rate in the low-carrier-to-noise-ratio environment. Attention is paid to designing the Viterbi decoder to be operated in a situation in which successive bursts may have different coding rates according to the punctured coding scheme. The overall scheme of the FEC combined modems are presented, and some of the key technologies applied in developing them are outlined. The hardware implementation and experimentation are also discussed. The measured data are compared with results of theoretical analysis, and relatively good performances are obtained.

本文言語English
ホスト出版物のタイトルUnknown Host Publication Title
Place of PublicationTokyo, Jpn
出版社Ohmsha Ltd
ページ274-280
ページ数7
ISBN(印刷版)4274031888
出版ステータスPublished - 1987
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)

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