講演抄録/キーワード |
講演名 |
2012-10-11 14:40
小型衛星のダウンリンクシステムに用いる高効率GaN増幅器とプレディストーション手法の開発 ○渡邊宏弥・深見友也(東大)・富木淳史・齋藤宏文・岩切直彦(JAXA) SANE2012-83 |
抄録 |
(和) |
A high-speed downlink communication system is required to meet different applications for nano/small satellites. Therefore, it is essential to implement a power- and weight-limited transmitter in such satellites. Our recent research has focused on an efficient system with the limited transmitter incorporating a powerful ground station receiver. Generally, an operation at nonlinear region provides a RF power amplifier with high energy efficiency. However, an amplitude-phase modulation, which is an efficient scheme in term of frequency band, requires high linearity. Digital pre-distortion on the transmitter is known as a powerful complementary nonlinearity of power amplifier. We are developing pre-distortion scheme for nano/small satellite transmitter. And we developed a new measurement method to evaluate the transmitter system. We will report the results of evaluation of the new transmitter engineering model. The results indicate that the new PA performances are suitable for multi-level modulation high-speed downlink system with pre-distortion such as 16-QAM system. Therefore, the power amplifier with high efficiency can be implemented. |
(英) |
A high-speed downlink communication system is required to meet different applications for nano/small satellites. Therefore, it is essential to implement a power- and weight-limited transmitter in such satellites. Our recent research has focused on an efficient system with the limited transmitter incorporating a powerful ground station receiver. Generally, an operation at nonlinear region provides a RF power amplifier with high energy efficiency. However, an amplitude-phase modulation, which is an efficient scheme in term of frequency band, requires high linearity. Digital pre-distortion on the transmitter is known as a powerful complementary nonlinearity of power amplifier. We are developing pre-distortion scheme for nano/small satellite transmitter. And we developed a new measurement method to evaluate the transmitter system. We will report the results of evaluation of the new transmitter engineering model. The results indicate that the new PA performances are suitable for multi-level modulation high-speed downlink system with pre-distortion such as 16-QAM system. Therefore, the power amplifier with high efficiency can be implemented. |
キーワード |
(和) |
小型衛星 / 衛星通信 / GaN-HEMTパワーアンプ / プレディストーション / ダウンリンク / Xバンド / / |
(英) |
small satellite / satellite communication system / GaN-HEMT power amplifier / pre-distortion / down link / X band / / |
文献情報 |
信学技報, vol. 112, no. 229, SANE2012-83, pp. 153-158, 2012年10月. |
資料番号 |
SANE2012-83 |
発行日 |
2012-10-03 (SANE) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
SANE2012-83 |
|