| 한글제목(Korean Title) |
An Efficient Power Control Algorithm for Satellite Communications Systems with ATC |
| 영문제목(English Title) |
An Efficient Power Control Algorithm for Satellite Communications Systems with ATC |
| 저자(Author) |
Byung-Gi Kim
Sang-Jin Ryoo
In-Tae Hwang
|
| 원문수록처(Citation) |
VOL 06 NO. 02 PP. 0129 ~ 0133 (2008. 06) |
한글내용
(Korean Abstract) |
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영문내용
(English Abstract) |
In this paper, modified power control algorithms are proposed for a satellite mobile communications system with ATC (ancillary terrestrial component). In order to increase system capacity and reduce the transmitting power of the user's equipment, we propose the modified power control scheme consisting of the modified closed-loop and open-loop power control. The modified CLPC (closed-loop power control) algorithm, combining the delay compensation algorithms and pilot diversity, is mainly applied to the ATC link in urban areas because it is more suitable to the short RTD (round-trip delay). In the case of rural areas where ATCs are not deployed or a signal is not received from ATCs, combining monitoring transmitting power equipment and OLPC (open-loop power control) algorithms using an efficient pilot diversity is mainly applied to the link between the user's equipment and the satellite. Two power control algorithms are applied equally to the boundary areas where two kinds of signals are received in order to ensure coverage continuity. The simulation results show that the modified power control scheme has good performance compared to conventional power control schemes in a GEO (geostationary earth orbit) satellite system with ATC. |
| 키워드(Keyword) |
Ancillary Terrestrial Component
modified power control scheme
OLPC
CLPC
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| 파일첨부 |
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