摘要
针对高阶跟踪环路稳定性比低阶环路差,大带宽带来测量误差大的问题。研究在高动态环境下,惯导加速度信息辅助卫星接收机三阶载波锁相环跟踪算法,以及不同环路参数下跟踪环路的性能。对载体高动态场景、加速度信息延迟进行建模,并对算法进行了数学仿真。仿真分析结果表明,在加速度信息辅助下,即使压缩载波跟踪环路等效噪声带宽到3Hz,在高达1200g/s的加速度动态下,环路跟踪同样稳定可靠。
This paper presents the arithmetic of 3^rd order carrier PLL assisted by acceleration information from INS （Inertial Navigation System） , also introduces the performance of tracking loop with different parameter of loop. The model for high dynamic condition and accelerates information delay are built, based on the model, the arithmetic is simulated. The result indicates that, with accelerate information auxiliary, tracking loop is stable under 1200g/s condition even compressing the noise bandwidth of carrier tracking loop down to 3Hz.
出处
《导航定位与授时》
2015年第3期74-79,共6页
Navigation Positioning and Timing
关键词
高动态
加速度
锁相环
惯性辅助
High dynamic
Acceleration
Phase locked loop
Inertial assistance
