Title :
COMETS for Ka-band and millimeter-wave advanced mobile satellite communications and 21 GHz advanced satellite broadcasting experiments
Author :
Wakana, Hiromitsu ; Morikawa, Eihisa ; Saito, Haruo ; Ohkawa, Mitsugu ; Takahashi, Takashi ; Tanaka, Masato
Author_Institution :
Commun. Res. Lab., Minist. of Posts & Telecommun., Ibaraki, Japan
Abstract :
COMETS (Communications and Broadcasting Engineering Test Satellite), which was developed to evaluate Ka-band (31/21 GHz) and millimeter-wave (47/44 GHz) advanced mobile satellite communications and 21-GHz advanced satellite broadcasting systems, is presented as well as the developed ground terminals. COMETS carries an SCPC/TDM regenerative transponder for direct mobile-to-mobile communications, and IF-filterbanks for interconnection between multibeams. For mobile and personal applications, a portable terminal for regenerative transponder experiments, and several antennas such as an active phased array antenna, a waveguide slot array antenna, and a torus reflector antenna were developed. For satellite broadcasting experiments, trellis-coded modems for HDTV transmission at 60/140 Mbps and 155 Mbps were developed
Keywords :
active antenna arrays; antenna phased arrays; band-pass filters; direct broadcasting by satellite; high definition television; mobile satellite communication; modems; personal communication networks; reflector antennas; satellite antennas; satellite ground stations; slot antenna arrays; transponders; trellis coded modulation; 140 Mbit/s; 155 Mbit/s; 21 GHz; 31 GHz; 44 GHz; 47 GHz; 60 Mbit/s; COMETS; Communications and Broadcasting Engineering Test Satellite; EHF; HDTV transmission; IF-filterbanks; Ka-band; SCPC/TDM regenerative transponder; SHF; active phased array antenna; ground terminals; millimeter-wave communications; mobile satellite communications; mobile-to-mobile communications; multibeam interconnection; personal applications; portable terminal; regenerative transponder experiments; satellite broadcasting experiments; torus reflector antenna; trellis-coded modems; waveguide slot array antenna; Antenna arrays; Artificial satellites; Mobile antennas; Mobile communication; Phased arrays; Reflector antennas; Satellite broadcasting; Slot antennas; System testing; Transponders;
Conference_Titel :
Communications, 1998. ICC 98. Conference Record. 1998 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-4788-9
DOI :
10.1109/ICC.1998.682590
