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Journal of the Korea Institute of Military Science and Technology 2000;3(2):131-139.
Design of a Two-dimensional Attitude Determining GPS Receiver
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이차원 자세 측정용 GPS 수신기 설계
손석보, 박찬식, 이상정
1충남대학교 전자공학과 대학원
2충북대학교 전기전자공학부
3충남대학교 전자공학과
Abstract
A design of CPS attitude determination system is described in this paper. The designed system is a low cost high precision 24 channel single frequency GPS(Global Positioning System) receiver which provides a precise absolute heading and pitch (or roll) as well as a position. It uses commercial chip-set and consists of two RF parts, two signal-tracking parts, a processor, memory parts and I/Os. In order to determine precise attitude, accurate carrier phase measurements and an efficient integer ambiguity resolution method are required. To meet these requirements, a PLL (Phase Locked Loops) is designed, and an algorithm called ARCE (Ambiguity Resolution with Constraint Equation) is adopted. The hardware and software structure of the system will be described, and the performance evaluated under various conditions will be presented. The test results will promise that more reliable navigation system be possible because the system provides all navigational information such as position, velocity, time and attitude.
Key Words: GPS, Attitude Determination, Ambiguity Resolution
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