Design of Software-Defined Radio Based Satellite Communication and Navigation Systems

• Main Authors: Chiu-TengTsai, 蔡秋藤
• Other Authors: Jyh-Ching Juang
• Format: Others
• Language: en_US
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/99753272474956261747

博士 === 國立成功大學 === 電機工程學系 === 103 === Satellite communication and navigation play essential roles in modern society. As more and more satellites being deployed into operation, the limitation of spectral resource makes the satellite communication development toward versatile trends. In the future, the ideal satellite communication system should have extensive bandwidth and be able to cope with any kinds of signals. Therefore, this dissertation develops a reconfigurable TT＆C system for microsatellites. Further, this dissertation utilizes SDR technique to integrate the weather satellite HRPT and APT signal receptions on a platform. This platform is able to perform multi-channel and multi-modulation real-time signal processing, and implement functions which are easy by software but complicated by hardware. As the launch of new satellite navigation systems, such as BeiDou satellite navigation system, the impact from these systems is significantly interesting. Therefore, it is necessary to rapidly implement reception platform to analyze these new signals and assess the performance. This dissertation realizes a PC-based BeiDou signal reception platform to investigate the navigation performance. This platform is rapidly modified in response to the signal specification released in different phases. As the applications of GNSS become important, the spoofing techniques advance and actual cases happen frequently. This dissertation proposes a GNSS signal authentication scheme with two SDRs and demonstrates to detect GPS L1, BDS B1 and B2 signal spoofing attacks. The proposed method relaxes the requirement in the control of the sampling rate and decreases the search space in the cross-correlation operation.