Journal of Systems Engineering and Electronics ›› 2021, Vol. 32 ›› Issue (5): 1232-1245.doi: 10.23919/JSEE.2021.000105

• RELIABILITY • Previous Articles     Next Articles

A method to realize NAVSOP by utilizing GNSS authorized signals

Ying YUAN1,2(), Feng YU1,2,*(), Yang CHEN1,2(), Niancheng ZHANG1,2()   

  1. 1 Key Laboratory of Space Photoelectric Detection and Perception, Nanjing 210016, China
    2 College of Aeronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2020-12-04 Online:2021-10-18 Published:2021-11-04
  • Contact: Feng YU E-mail:yuanying123@nuaa.edu.cn;yufeng@nuaa.edu.cn;1009914555@qq.com;1120094312@qq.com
  • About author:|YUAN Ying was born in 1997. He received his B.S. degree in the College of Aeronautics from Nanjing University of Aeronautics and Astronautics in 2017. His research interests include autonomous navigation, artificial neural network and integrated navigation. E-mail: 2254940674@qq.com||YU Feng was born in 1980. He is now a professor at the College of Aeronautics from Nanjing University of Aeronautics and Astronautics. His research interests include micro-nano satellite control technology, on-orbit service, navigation and positioning. E-mail: yufeng@nuaa.edu.cn||CHEN Yang was born in 1998. He received his B.S. degree in the College of Aeronautics from Nanjing University of Aeronautics and Astronautics in 2020. His research interests include visual navigation and 3D modeling. E-mail: 1009914555@qq.com||ZHANG Niancheng was born in 1998. He received his B.S. degree in the College of Civil Aviation from Nanjing University of Aeronautics and Astronautics in 2020. His research interests include X-ray pulsar navigation and deep space detection. E-mail: 1120094312@qq.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (61673212)

Abstract:

Navigation via signals of opportunity (NAVSOP) is able to realize positioning by making use of hundreds of different signals that are all around us. A method to realize NAVSOP for low earth orbit (LEO) satellites is proposed in this paper, in which the global navigation satellite system (GNSS) authorized signals are utilized as the signal of opportunity (SOP). At first, the carrier recovery technique is studied under the premise that the pseudo-code is unknown. Secondly, a method based on characteristics of Doppler frequency shift is proposed to recognize the navigation satellites. Thirdly, the extended Kalman filter (EKF) is utilized to estimate the orbital parameters by using carrier phase measurements. Finally, the proposed method is evaluated by using signals generated by a satellite navigation data simulator. The simulation results show that the proposed method can successfully realize navigation via GNSS authorized signals.

Key words: navigation via signals of opportunity (NAVSOP), codeless technique, carrier recovery, satellite recognition, orbit determination