Developments of high-efficiency GaN RF amplifier and pre-distortion technique for nano/small satellite downlink system(ICSANE 2012 (International Conference on Space, Aeronautical and Navigational Electronics))
スポンサーリンク
概要
- 論文の詳細を見る
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.
- 2012-10-03
著者
-
Saito Hirobumi
Japan Aerospace Exploration Agency
-
Tomiki Atsushi
Japan Aerospace Exploration Agency
-
WATANABE Hiromi
The University of Tokyo
-
IWAKIRI Naohiko
Japan Aerospace Exploration Agency
-
FUKAMI Tomoya
The University of Tokyo
関連論文
- AN OVERVIEW AND LESSONS-LEARNED OF SMALL SCIENTIFIC SATELLITE "INDEX"(REIMEI)(WSANE2007)
- Stochastic Modeling of Phase Noise for Deep Space Communication Systems(WSANE 2009 (Workshop for Space, Aeronautical and Navigational Electronics))
- Inter-Satellite Ranging System for Multiple Spacecrafts in Formation Flight and Its Experimental Evaluation(WSANE 2008 (Workshop for Space, Aeronautical and Navigational Electronics))
- Space VLBI Mission : ASTRO-G(WSANE 2008 (Workshop for Space, Aeronautical and Navigational Electronics))
- Performance Analysis of SCCC Turbo Equalization with Nonlinear Satellite Channel Compensation Techniques for Nano/Small Satellite High-Speed Communication Systems(Technical Session,ICSANE 2011(International Conference on Space, Aeronautical and Navigation
- A Cross Polarization Suppressed Sequential Array with L-Probe Fed Rectangular Microstrip Antennas
- A Cross Polarization Suppressed Sequential Array with L-Probe Fed Rectangular Microstrip Antennas
- Experimental Evaluation of Ultra Wideband Wireless Links within a Spacecraft for Replacing Wired Interface Buses
- Developments of high-efficiency GaN RF amplifier and pre-distortion technique for nano/small satellite downlink system(ICSANE 2012 (International Conference on Space, Aeronautical and Navigational Electronics))
- Turbo equalizer/decoder performances of nonlinear channels due to different classes of GaN HPAs for X-band nano satellite high-speed downlink system(ICSANE 2012 (International Conference on Space, Aeronautical and Navigational Electronics))
- Charge and Discharge Performance of the Lithium-ion Secondary Battery in Space