Design and realization of adaptive tracking loops for GPS receiver

作者：Wang Xinlong^*; Song Shuai

来源：Aircraft Engineering and Aerospace Technology, 2015, 87(4): 368-375.

DOI：10.1108/AEAT-04-2011-0059

• Adaptive tracking loops
• Carrier-to-noise density ratio
• Dynamic stress error
• Measurement errors
• Thermal noise jitter

Purpose - The purpose of this paper is to improve the tracking performance of the tracking loops under high dynamic and severe jamming conditions.
Design/methodology/approach - First, as the two dominant measurement error sources of the tracking loops, the thermal noise jitter and the dynamic stress error are thoroughly analyzed. Second, a scheme of adaptive tracking loops, which could adaptively adjust the order and the bandwidth of tracking loops, is proposed. Third, real-time detections of the vehicle dynamics and the carrier-to-noise density ratio, and the adaptive bandwidth of the carrier loop are presented, respectively. Finally, simulations are operated to validate the excellent tracking performance of the adaptive tracking loops.
Findings - Based on the principle of minimizing the measurement errors, the loop order and bandwidth are adaptively adjusted in the proposed scheme. Thus, the anti-jamming capability and dynamic tracking performance of the tracking loops could be effectively enhanced.
Practical implications - This paper provides further study on the method of improving the tracking capability under complexly applied conditions of high dynamics and severe jamming.
Originality/value - The detections of carrier-to-noise density ratio and vehicle dynamics are used to adaptively adjusting the loop order and bandwidth, which could not only improve the measurement accuracy but also ensure the stable operation of tracking loops.

• 出版日期2015
• 单位北京航空航天大学