Development of a software-based IF GPS signal simulator

Yongkang Hu; Dongkai Yang; Yiqiang Zhang; Qishan Zhang

doi:10.1117/12.855487

2 April 2010 Development of a software-based IF GPS signal simulator

Yongkang Hu, Dongkai Yang, Yiqiang Zhang, Qishan Zhang

Proceedings Volume 7651, International Conference on Space Information Technology 2009; 76513W (2010) https://doi.org/10.1117/12.855487
Event: International Conference on Space Information Technology 2009, 2009, Beijing, China

Abstract

Due to the flexible ability, research on software GPS receiver is now attracting more and more attention. In order to evaluate a software GPS receiver's performance, there are two way to provide GPS signal. One is to use a set of real GPS signal measurements collected by a commercial front-end. The other way is to use software GPS signal simulator to generate digitized IF GPS signal. This paper develops a software-based IF GPS signal simulator for the L1 C/A code signal. The design principles, implementation factors, and verification are described in this paper. Firstly, a mathematical signal model is developed, which includes various error source, such as satellite clock error, ionosphere error, and troposphere error. Then one channel structure of IF GPS signal simulator represented one satellite is given. How to simulate the main modules in this structure is introduced. As the key point of IF GPS signal simulator, two iterative algorithms are introduced. Finally the simulator is verified by using a software GPS receiver.

Citation Download Citation

Yongkang Hu, Dongkai Yang, Yiqiang Zhang, and Qishan Zhang "Development of a software-based IF GPS signal simulator", Proc. SPIE 7651, International Conference on Space Information Technology 2009, 76513W (2 April 2010); https://doi.org/10.1117/12.855487

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