摘要
载波相位平滑伪距可以有效地提高北斗伪距定位的解算精度,传统的Hatch滤波由于平滑窗口大小是固定的,在持续定位解算中容易发散,因此必须合理地选择平滑窗口的大小。通过分析平滑因子的影响因素,利用改进的粒子群算法(IPSO)对每一历元的平滑窗口大小进行寻优,确定最优平滑窗口的大小。实验表明,利用改进粒子群和Hatch组合的算法(IPSO-HATCH)能够有效地提升滤波效果和定位精度,解决了Hatch滤波平滑窗口大小选择的问题,证明了算法的有效性、稳定性和可靠性。
Carrier-smoothed pseudorange can improve the accuracy of compass pseudorange positioning effectively.Traditional Hatch fiter is easy to diverge in the continuous positioning because of the fixed smoothing window size,therefore, the size of smoothing window must be selected reasonably. Through an analysis on the factors affecting the size of smoothing window, the best window size of every epoch was sought for and determined by using the improved particle swarm optimization（IPSO） algorithm. Experimental results show that the combined algorithm of IPSO and Hatch（IPSO-HATCH） can effectively improve the filtering effect and positioning accuracy and solve the problem of selecting the size of smoothing window, the effectiveness, stability and reliability of the algorithm were verified.
作者
席志红
刁硕
常佳博
XI Zhihong;DIAO Shuo;CHANG Jiabo(College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《应用科技》
CAS
2018年第3期44-49,共6页
Applied Science and Technology
关键词
平滑伪距
相位平滑
伪距
平滑窗口
窗口大小
改进粒子群算法
HATCH滤波
smoothing pseudo-range
phase smoothing
pseudo-range
smoothing window
window size
improved particle swarm algorithm
Hatch filter
