A method to realize NAVSOP by utilizing GNSS authorized signals  

作　　者：YUAN Ying YU Feng CHEN Yang ZHANG Niancheng 

机构地区：[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

出　　处：《Journal of Systems Engineering and Electronics》2021年第5期1232-1245,共14页系统工程与电子技术（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(61673212).

摘　　要：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.

关 键 词：navigation via signals of opportunity(NAVSOP) codeless technique carrier recovery satellite recognition orbit determination 

分 类 号：TN967.1[电子电信—信号与信息处理] P228.4[电子电信—信息与通信工程]