【摘 要】
：
High dynamic conditions impose critical challenges on Global Navigation Satellite Sys-tem (GNSS) receivers,leading to large tracking errors or even loss of tracking.Current methods that intend to improve receivers\' adaptability for high dynamics requir
【机 构】
：
Navigation Research Center,Nanjing University of Aeronautics & Astronautics,Nanjing 211106,China;Key
论文部分内容阅读
High dynamic conditions impose critical challenges on Global Navigation Satellite Sys-tem (GNSS) receivers,leading to large tracking errors or even loss of tracking.Current methods that intend to improve receivers\' adaptability for high dynamics require either complicated struc-tures or prior statistical information of noises.This paper proposes a high dynamics algorithm based on steepest ascent method that can circumvent the deficiencies of existing methods.First,the relationship between the error of carrier tracking and the maximum of Fast Fourier Transform(FFT) outputs is established,and a performance function based on the steepest ascent method is designed.It can keep stable in high dynamics.Second,a new carrier-tracking loop is constructed by deploying the performance function.When the variation of GPS receiver acceleration ranges from 10 g to 100 g,compared with the PLL that either loses lock or keeps tracking accuracy less than 33.89 Hz,the experimental results show that the proposed method can not only keep tracking,but also achieve tracking accuracy more than 2.77 Hz.
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