caa a22 4500 606162542 CHVBK 20210128100639.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s10291-014-0382-8 doi (NATIONALLICENCE)springer-10.1007/s10291-014-0382-8 A high-sensitivity GPS receiver carrier-tracking loop design for high-dynamic applications [Elektronische Daten] [Xinlong Wang, Xinchun Ji, Shaojun Feng, Vincent Calmettes] In order to enhance the tracking performance of global positioning system (GPS) receivers for weak signal applications under high-dynamic conditions, a high-sensitivity and high-dynamic carrier-tracking loop is designed. The high-dynamic performance is achieved by aiding from a strapdown inertial navigation system (SINS). In weak signal conditions, a dynamic-division fast Fourier transform (FFT)-based tracking algorithm is proposed to improve the sensitivity of GPS receivers. To achieve the best performance, the tracking loop is designed to run either in the conventional SINS-aided phase lock loop mode (time domain) or in the frequency-domain-tracking mode according to the carrier-to-noise spectral density ratio detected in real time. In the frequency-domain-tracking mode, the proposed dynamic-division FFT algorithm is utilized to estimate and correct the error of the SINS aiding. Furthermore, the optimal values of the dynamic-division step and the FFT size are selected to maximize the signal-to-noise ratio gain. Simulation results demonstrate that the designed loop can significantly improve the tracking sensitivity and robustness for weak GPS signals without compromising the dynamic performance. Springer-Verlag Berlin Heidelberg, 2014 High sensitivity nationallicence Carrier-tracking loop nationallicence SINS aiding nationallicence Dynamic-division FFT nationallicence Wang Xinlong School of Astronautics, Beihang University, 100191, Beijing, China aut Ji Xinchun School of Astronautics, Beihang University, 100191, Beijing, China aut Feng Shaojun Department of Civil and Environmental Engineering, Centre for Transport Studies, Imperial College London, SW7 2AZ, London, UK aut Calmettes Vincent University of Toulouse, ISAE-DEOS, 10 Avenue Edoard Belin, 31055, Toulouse, France aut GPS Solutions Springer Berlin Heidelberg 19/2(2015-04-01), 225-236 1080-5370 19:2<225 2015 19 10291 https://doi.org/10.1007/s10291-014-0382-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10291-014-0382-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Xinlong School of Astronautics, Beihang University, 100191, Beijing, China aut NATIONALLICENCE 700 1- Ji Xinchun School of Astronautics, Beihang University, 100191, Beijing, China aut NATIONALLICENCE 700 1- Feng Shaojun Department of Civil and Environmental Engineering, Centre for Transport Studies, Imperial College London, SW7 2AZ, London, UK aut NATIONALLICENCE 700 1- Calmettes Vincent University of Toulouse, ISAE-DEOS, 10 Avenue Edoard Belin, 31055, Toulouse, France aut NATIONALLICENCE 773 0- GPS Solutions Springer Berlin Heidelberg 19/2(2015-04-01), 225-236 1080-5370 19:2<225 2015 19 10291