WO2002001753A1 - Systeme de communication par satellites - Google Patents
Systeme de communication par satellites Download PDFInfo
- Publication number
- WO2002001753A1 WO2002001753A1 PCT/JP2000/004252 JP0004252W WO0201753A1 WO 2002001753 A1 WO2002001753 A1 WO 2002001753A1 JP 0004252 W JP0004252 W JP 0004252W WO 0201753 A1 WO0201753 A1 WO 0201753A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- satellite
- antenna beam
- satellite antenna
- area
- land
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/288—Satellite antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
- H01Q25/002—Antennas or antenna systems providing at least two radiating patterns providing at least two patterns of different beamwidth; Variable beamwidth antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/204—Multiple access
- H04B7/2041—Spot beam multiple access
Definitions
- the present invention relates to a satellite communication system, and more particularly, to a radio circuit configuration between a satellite and an earth station.
- a part of the satellite mobile communication frequency band is the allowable value of interference to existing terrestrial wireless communication systems on land and inland seas, that is, the allowable interference value.
- Figure 4 shows the document "System Trade Off for a North American Mobile Satellite” (BP Coxs J. Zacharatos ⁇ B. Williamsons C. Morgan, JRG Cox; Spar Aerospace Limited ⁇ AIAA 12th International Communication Satellite Systems Conference ⁇ March 13-17, 1988 / Arlington Virginia), showing the configuration of a satellite antenna beam providing satellite mobile communication services in the 1.5 GHz band in North America.
- BP Coxs J. Zacharatos ⁇ B. Williamsons C. Morgan, JRG Cox; Spar Aerospace Limited ⁇ AIAA 12th International Communication Satellite Systems Conference ⁇ March 13-17, 1988 / Arlington Virginia showing the configuration of a satellite antenna beam providing satellite mobile communication services in the 1.5 GHz band in North America.
- one satellite antenna beam B7 irradiates only a part of land.
- the remaining seven satellite antenna beams B 1 to B 6, B 8, and B 9 illuminate part of the land and part of the sea.
- the frequency of the satellite antenna beam B7 that irradiates only land and the satellite antenna beams B1 to B6, B8, and B9 that irradiate both land and sea are in the same 1.5 GHz band. Due to the restriction on the allowable interference value for terrestrial radio communication systems, it was difficult to reduce the size and increase the capacity of the satellite mobile terminal.
- Satellite communication systems have features such as wide area coverage, ease of line setup, and high reliability.They are suitable for information communication systems and have evolved.However, interference with terrestrial wireless communication systems, i.e., interference Reduction (Minimization of interference to other systems) and interference received from terrestrial wireless communication systems
- the present invention solves the above-mentioned problems, is compatible with terrestrial radio systems, has excellent wide-area characteristics, easy line setting, and wide-band characteristics, enables large-capacity transmission by small terminals in land areas, and has an advantage in marine and aviation areas.
- the objective is to realize a satellite communication system that can reduce interference with terrestrial wireless systems.
- a satellite communication system is directed to a satellite communication system in which a communication device mounted on a satellite and a ground station communicate with each other by forming a wireless link between the communication device mounted on the satellite and the earth station.
- the first satellite antenna beam irradiates at least the inner marine area including the land and in contact with the land, and the second satellite antenna beam irradiates only the outer marine area adjacent to the inner marine area.
- the first and second satellite antenna beams form a communication service area, and the frequency of the first satellite antenna beam is higher than the frequency of the second satellite antenna beam and in a wide band. It is characterized by having.
- the first satellite antenna beam irradiates an inner ocean area including one or more land areas.
- the first satellite antenna beam is such that only a part of the land periphery It is characterized by irradiating the inner marine area including the land adjacent to the area. Further, the first satellite antenna beam is characterized in that two or more portions around the land illuminate the inner marine area including the land adjacent to the inner marine area.
- Fig. 1 is an explanatory diagram showing an example of a composite satellite antenna beam arrangement in Japan, consisting of a satellite antenna beam for the inner ocean including one or more land areas and a satellite antenna beam for the outer ocean,
- Fig. 2 is an explanatory diagram showing an example of a composite satellite antenna beam arrangement in South America, consisting of an antenna beam for the inner ocean, which includes a land part of which is in contact with the inner ocean, and a satellite antenna beam for the outer ocean. .
- Fig. 3 shows an example of a composite satellite antenna beam arrangement in North America, consisting of a satellite antenna beam for the inner ocean including a land area where two or more surrounding parts are in contact with the ocean, and a satellite antenna beam for the outer ocean.
- FIG. 4 is an explanatory diagram showing a configuration of a satellite antenna beam providing a satellite mobile communication service in the 1.5 GHz band in North America.
- a satellite that irradiates the earth from the communication device mounted on the satellite to the earth A satellite beam that illuminates a complex area consisting of the entire land area and the inner ocean area, including the land and the inner ocean area surrounding the land, as the antenna beam, and only the outer ocean area excluding the inner ocean area that touches the land.
- a composite antenna beam with a satellite antenna beam that illuminates the satellite a communication service area is formed, and the satellite antenna beam frequency that illuminates the complex area consisting of the entire land and the inner marine area is set, and only the outer marine area is used. Irradiation satellite antenna beam frequency Higher than the number and broadband.
- Fig. 1 relates to the first embodiment, is an example of Japan, and shows a satellite antenna beam that irradiates the inner marine area 1 at a first frequency on a boundary 2 including one or more land areas. And a satellite antenna beam illuminating the outer marine area 3 bordering the boundary 2 with the inner marine area 1 using the second frequency, and two beams having different frequency bands and different frequencies.
- the figure shows an example of the antenna beam arrangement of a composite satellite composed of.
- the configuration of the communication service area based on the arrangement of the satellite antenna beams and the setting of the frequency band and frequency of the satellite antenna beams according to Embodiment 1 can be applied to, for example, Japan, Australia, the Philippines, Indonesia, Taiwan, and the like. it can.
- an inner marine area including one or more land areas is provided.
- a composite antenna beam consisting of a satellite antenna beam that illuminates the sea and a satellite antenna beam that irradiates only the outer marine area.
- the satellite antenna beam frequency to irradiate shall be higher and wider than the satellite antenna beam frequency to irradiate only the outer ocean area.
- the inner marine region including land and the outer marine region have different frequency bands and frequencies, mutual interference can be reduced, and in the inner marine region, the capacity can be increased by using a high frequency and wide band frequency band. It can serve many users and can be serviced over a wide area. Furthermore, the lower the interference, the lower the loss, thus facilitating circuit design.
- Embodiment 2 in the second embodiment, in a satellite communication system in which a communication line mounted between a satellite and an earth station communicates by configuring a radio link, a satellite that irradiates the earth from the communication device mounted on the satellite to the earth
- a composite antenna consists of a satellite antenna beam that illuminates the inner marine area including the land where a part of the surrounding area is in contact with the inner marine area, and a satellite antenna beam that irradiates only the outer marine area that is in contact with the inner marine area.
- FIG. 2 shows a satellite antenna beam according to the second embodiment, which is an example of South America, irradiating the inner marine area and a land 4 where a part of the surrounding marine area is in contact with the first frequency, and A satellite antenna beam using a second frequency to illuminate the outer marine area 3 adjoining it via a boundary line 5 of the composite satellite antenna comprising two beams with different frequency bands and different frequencies.
- 7 shows an embodiment of a beam arrangement.
- the configuration of the communication service area based on the arrangement of the satellite antenna beams and the setting of the frequency band and frequency of the satellite antenna beam according to the second embodiment include, for example, Brazil, Korea, China, India, Argentina, Peru, Portugal, etc. It can be applied to
- a communication service area is constructed by arranging a composite antenna beam consisting of a satellite antenna beam that irradiates the inner ocean area including the outside ocean area and a satellite antenna beam that irradiates only the outer ocean area.
- the frequency of the satellite antenna beam that irradiates the inner marine area including some land areas is higher than the frequency of the satellite antenna beam that irradiates only the outer marine area, and has a wider band.
- Embodiment 3 As a result, it is possible to reduce the mutual interference between communication service terminal communication on land and communication service terminal communication on the sea or air, improving wide-area characteristics, easy line setting, and broadband characteristics. There is an effect that an excellent satellite communication system can be realized.
- Embodiment 3
- a composite antenna beam consisting of a satellite antenna beam that irradiates the inner marine area including the inner ocean area and a satellite antenna beam that irradiates only the outer marine area adjacent to the inner marine area.
- the frequency of the satellite antenna beam that irradiates the inner ocean area including the ground is higher than the frequency of the satellite antenna beam that irradiates only the outer ocean area, and has a wider band.
- FIG. 3 relates to the third embodiment and is an example of North America.
- a satellite antenna beam irradiating an inner marine area 6 including a land where two or more surrounding parts are in contact with the ocean at a first frequency. And a satellite antenna beam that illuminates the outer marine area 3 using a second frequency, and shows an example of a composite satellite antenna beam configuration consisting of two beams having different frequency bands and frequencies.
- the configuration of the communication service area based on the arrangement of the satellite antenna beams and the setting of the frequency band and frequency of the satellite antenna beam according to the third embodiment are described in, for example, US, Canada, Mexico, Panama, Colombia, Spain, France, It can be applied to the Soviet Union.
- a composite antenna beam consisting of a satellite antenna beam that illuminates the inner ocean area including the land in contact with the satellite and a satellite antenna beam that illuminates only the outer ocean area.
- the frequency of the satellite antenna beam that irradiates the inner marine area including the land where two or more parts are in contact with the ocean is higher than the frequency of the satellite antenna beam that irradiates only the outer marine area, and has a wide band.
- land-based communication service terminal communication and maritime and air-based communication service It has the effect of reducing mutual interference with terminal communication and realizing a satellite communication system with excellent wide-area characteristics, easy line setup, and excellent wide-band characteristics.
- the present invention it is possible to coexist with a terrestrial radio system, and is excellent in wide area, easy line setting, wide band characteristics, large-capacity transmission by small terminals in land areas, and in marine and air areas. It is possible to realize a satellite communication system that can reduce interference with a terrestrial wireless system.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Aviation & Aerospace Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Relay Systems (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2000/004252 WO2002001753A1 (fr) | 2000-06-28 | 2000-06-28 | Systeme de communication par satellites |
EP00942370A EP1209821A4 (en) | 2000-06-28 | 2000-06-28 | SATELLITE COMMUNICATION SYSTEM |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2000/004252 WO2002001753A1 (fr) | 2000-06-28 | 2000-06-28 | Systeme de communication par satellites |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002001753A1 true WO2002001753A1 (fr) | 2002-01-03 |
Family
ID=11736195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/004252 WO2002001753A1 (fr) | 2000-06-28 | 2000-06-28 | Systeme de communication par satellites |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1209821A4 (ja) |
WO (1) | WO2002001753A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011109467A (ja) * | 2009-11-18 | 2011-06-02 | National Institute Of Information & Communication Technology | 地上−衛星周波数共用通信システムの干渉評価方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02171038A (ja) * | 1988-12-24 | 1990-07-02 | Mitsubishi Electric Corp | マルチビームアンテナ方式 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5963175A (en) * | 1998-08-22 | 1999-10-05 | Cyberstar, L.P. | One dimensional interleaved multi-beam antenna |
-
2000
- 2000-06-28 WO PCT/JP2000/004252 patent/WO2002001753A1/ja not_active Application Discontinuation
- 2000-06-28 EP EP00942370A patent/EP1209821A4/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02171038A (ja) * | 1988-12-24 | 1990-07-02 | Mitsubishi Electric Corp | マルチビームアンテナ方式 |
Non-Patent Citations (2)
Title |
---|
HEIICHI YAMAMOTO ET AL.: "Maruzen advanced technology eisei tsuushin", MARUZEN K.K., 30 September 1993 (1993-09-30), pages 46 - 47, XP002907797 * |
See also references of EP1209821A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011109467A (ja) * | 2009-11-18 | 2011-06-02 | National Institute Of Information & Communication Technology | 地上−衛星周波数共用通信システムの干渉評価方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1209821A1 (en) | 2002-05-29 |
EP1209821A4 (en) | 2002-11-27 |
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