PSK GROUP MODEM FOR SATELLITE COMMUNICATIONS.

Fumio Takahata*, Masayuki Yasunaga, Yasuo Hirata, Tomoki Ohsawa, Junji Namiki

*この研究の対応する著者

研究成果: Article査読

22 被引用数 (Scopus)

抄録

A PSK group modem which modulates and demodulates multiple PSK signals en bloc will play an important role in realizing a cost-effective satellite communications system based on the narrowband multicarrier PSK/FDMA technique. Its possible applications are briefly discussed, and a developed PSK group modem is presented, including its algorithm, hardware design, and implementation. In the algorithm, filtering of respective PSK signals is effectively carried out by digital signal processing techniques applied to the digital transmultiplexer. Furthermore, in order to compensate for the difference between the operation timing of the PSK group modem and the symbol timing of each input/output data signal, digital signal processing based on a table-look-up method using ROM and a rate-conversion filter with adaptive weighting are proposed for the modulator and demodulator, respectively. An experimental four-phase PSK group modem has been developed, and experiments have been conducted under various conditions. The measured performance of the developed hardware is also demonstrated.

本文言語English
ページ(範囲)648-661
ページ数14
ジャーナルIEEE Journal on Selected Areas in Communications
SAC-5
4
出版ステータスPublished - 1987 5月
外部発表はい

ASJC Scopus subject areas

  • コンピュータ ネットワークおよび通信
  • 電子工学および電気工学

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