IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0203609
(1994-02-28)
|
| 우선권정보 |
FR-0003509 (1991-03-22) |
|
발명자
/ 주소 |
- Rouffet Denis (Boulogne Billancourt FRX) Bailly Alain (Ramonville Saint Agne FRX) Boucheret Grard (Toulouse FRX)
|
| 출원인 / 주소 |
- Alcatel Espace (Courbevoie FRX 03)
|
| 인용정보 |
피인용 횟수 :
20 인용 특허 :
0 |
초록
▼
A direct television broadcasting satellite facility (S1, S2, S3) having at least two coverage areas (T1, T2). At the beginning of the life of the facility, with present Standards, only two satellites (S1, S2) each having two beams (F1 & F2 and F′1 & F′2) are used, each satellite having 12 channel an
A direct television broadcasting satellite facility (S1, S2, S3) having at least two coverage areas (T1, T2). At the beginning of the life of the facility, with present Standards, only two satellites (S1, S2) each having two beams (F1 & F2 and F′1 & F′2) are used, each satellite having 12 channel and redundancy amplifiers for five channels. When high-definition television is subsequently introduced progressively, the amplifiers will be coupled together in parallel and in pairs, and at least one additional satellite (S3), identical to the two initial satellites, will be launched when required.
대표청구항
▼
In a satellite telecommunications system for direct television broadcasting, covering two different Earth coverage areas with two different respective sets of predetermined transmission channels, wherein each of the coverage areas selectively receives transmission channels of the following two types
In a satellite telecommunications system for direct television broadcasting, covering two different Earth coverage areas with two different respective sets of predetermined transmission channels, wherein each of the coverage areas selectively receives transmission channels of the following two types: a first type requiring, on each of two communication satellites, one medium-power amplifier (A1, or A2, . . . , or A12) per transmission channel; and a second type requiring, on said each satellite and per channel, one higher-power amplifier having approximately twice as much power as said medium-power amplifier; the improvement wherein said system comprises: a first operational communication satellite (S1) normally continuously operating to cover only a first coverage area (T1) with only a first set of a number of predetermined transmission channels via a first satellite first beam (F1), and only redundantly operating also to cover a second, different coverage area (T2) with a second, different set of said number of predetermined transmission channels via a first satellite second beam (F2); and a second operational communication satellite (S2), identical to said first operational communication satellite (S1), normally continuously operating to cover only said second coverage area (T2) with only said second, different set of said number of predetermined transmission channels via a second satellite first beam (F′2), and only redundantly operating also to cover said first coverage area (T1) with a second satellite second beam (F′1), each of said first (S1) and second (S2) operational communication satellites operating redundantly only when the other becomes inoperative, neither of said first and second operational communication satellites being an idle, spare satellite, each of said first and second operational communication satellites having a plurality of first medium-power amplifiers, equal in number to said number of predetermined transmission channels one of which is associated with each of the predetermined transmission channels of said first set of predetermined channels, and having a plurality of second medium-power amplifiers, one of which is associated with each of the predetermined transmission channels in said second set of predetermined channels, said second medium power amplifiers being equal in number to said first medium-power amplifiers; and coupling means (9, 15, 12) on said each operational communication satellite for selectively coupling in parallel a pair of said first and second medium-power amplifiers to form a higher power amplifier in said first operational communication satellite, and a corresponding pair of said first and second medium-power amplifiers to form a higher power amplifier in said second operational communication satellite, each time a predetermined channel of the second type is to be received.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.