Repeaters for multibeam satellites

Details Repeaters for multibeam satellites Repeaters for multibeam satellites

1996-04-17

1998-10-13

Kizou, Hassan

Multiplex communications

Communication over free space

Repeater

370492, 455428, H04B 7185

Patent

active

058223126

ABSTRACT:
A repeater for a multibeam communications satellite combines the features of coaxial channel interbeam switching and subchannelization of some of the channels. In one embodiment described, the input radio-frequency signals from the input beams are fed through the input multiplexers to form channels. Some, but not all, channels are subsequently subchannelized for interbeam switching. In another embodiment of the invention, a portion of the incoming radio frequency signals bypasses the input demultiplexer and is filtered for noise-limiting reasons, converted down to an intermediate frequency and then subchannelized using SAW filters. The specification also teaches that digital techniques can be used to obtain the same results. Especially in the case of satellites with a large number of beams and a large number of channels, it is not necessary to have full interbeam switching of all the subchannels derived from one channel: instead, the specification proposes the use of parallel configurations of smaller, less complex switching networks.

REFERENCES:
patent: 3548108 (1970-12-01), Yamato et al.
patent: 3636452 (1972-01-01), Nuding
patent: 4029902 (1977-06-01), Bell, Jr. et al.
patent: 4144495 (1979-03-01), Metzger
patent: 4228401 (1980-10-01), Wachs et al.
patent: 4242756 (1980-12-01), Huffman et al.
patent: 4381562 (1983-04-01), Acampora
patent: 4425639 (1984-01-01), Acampora et al.
patent: 4456988 (1984-06-01), Nakagome et al.
patent: 4691882 (1987-09-01), Young
patent: 4706239 (1987-11-01), Ito et al.
patent: 4813036 (1989-03-01), Whitehead
patent: 4858225 (1989-08-01), de Santis
patent: 4858229 (1989-08-01), Rosen et al.
patent: 4868886 (1989-09-01), Assal et al.
patent: 5033108 (1991-07-01), Lockwood
patent: 5068813 (1991-11-01), Thoen
patent: 5129095 (1992-07-01), Davis et al.
patent: 5233609 (1993-08-01), Hunton
patent: 5274627 (1993-12-01), De Santis
patent: 5274840 (1993-12-01), Schwendeman
patent: 5303286 (1994-04-01), Weideman
patent: 5343512 (1994-08-01), Wang et al.
patent: 5355512 (1994-10-01), Profera, Jr.
patent: 5394560 (1995-02-01), Krane
patent: 5396643 (1995-03-01), Frenzer et al.
patent: 5408515 (1995-04-01), Bhagat et al.
patent: 5428814 (1995-06-01), Mort et al.
patent: 5432780 (1995-07-01), Smith et al.
patent: 5555257 (1996-09-01), Dent
patent: 5563892 (1996-10-01), Kostreski et al.
"The Application of Surface Acoustic Wave Filters to Communications Satellite Design" AIAA-94-1007-CP, pp. 707-715 R.C. Peach, F.Z. Bi and B. Van Osch COM DEV Ltd., Cambridge, Ontario, Danada.
SS/FDMA System for Digital Transmission "Application of Bandwidth-Variable SAW Filter Matrix for Efficient Interbeam Connection in Multibeam Satellite" H. Shinonaga and Y. Ito KDD R&D Laboratories Nakameguro 2-1-23, Meguro, Tokyo 153 Japan.

Affiliated with

Also associated with

Rating

Repeaters for multibeam satellites does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Repeaters for multibeam satellites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Repeaters for multibeam satellites will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-320801