基于SINS辅助的PLL带宽选择方法

SINS-aided PLL Bandwidth Selection Method

为了稳定跟踪高动态下的弱信号,分析了传统载波锁相环(Phase Lock Loop,PLL)的结构,进一步提出了采用捷联惯导系统(Strapdown Inertial Navigation System,SINS)辅助全球导航卫星系统(Global Navigation Satellite System,GNSS)的PLL环路结构。通过分析SINS辅助前后的误差并比较不同误差的影响,按照误差最小原则设计了最优带宽的计算方法,并优化了最小带宽门限的选择方法,最后通过仿真验证了方法的有效性。

In order to steadily track the weak signals under high dynamic,the structure of traditional Phase Lock Loop( PLL) is analyzed firstly,then a structure of PLL based on Global Navigation Satellite System( GNSS) with Strapdown Inertial Navigation System( SINS)-aided is put forward. After analyzing the errors with or without SINS-aided and compared with the effect of different errors,the optimum bandwidth computing method is designed according to the principle of minimum error and the selection method of minimum bandwidth threshold is optimized. Finally,the validity of the method is verified by simulation.