| Author | Siriluk Chairuangwit |
| Call Number | AIT Thesis no.TC-97-17 |
| Subject(s) | Artificial satellites in telecommunication
|
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering. |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. TC-97-17 |
| Abstract | The interference between feeder link of Low Earth Orbit satellite system (LEO) and the terrestrial radio-relay system becomes an obvious problem when the feeder link frequency spectrum is allocated in the 4-31 GHz range, which is already occupied by the existing terrestrial radio-relay system. For the development of a frequency sharing procedure between these systems, the situation is investigated by considering the effects of different parameters to the interference scenario. The LEO orbital dynamic simulation is built as an interacting system with the terrestrial radio-relay station while the interference calculations are performed. The most dominant parameter, which should be taken into account while the coordination process between these systems is performed, is analyzing from the simulated results. For the interference from the satellite constellation to the radio-relay station path, the simulation results present that it is possible to share between one LEO satellite system and the terrestrial radio-relay link, which have a normal (0°-5°) antenna elevation angle. In the case of interference between gateway station and radio-relay station, the distance between the stations is not the most dominant factor. While the position of gateway station, which is related to the mainbeams of the radio-relay station, is more importance than the distance. In additional the effects due to the different orbital shapes can be presented by the gateway station azimuth angle probability distribution, which is not an equally likely and varying with the different gateway station latitude. Finally, the pre-determination procedure for the suitable gateway location is proposed in this study. |
| Year | 1997 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. TC-97-17 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Ahmed, Kazi Mohiuddin |
| Examination Committee(s) | Premanandana Rajatheva;Erke, Tapio |
| Scholarship Donor(s) | AIT Partial scholarship and United Communication Industry (public) Company Limited |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1997 |