基于IPSO-HATCH的北斗相位平滑伪距定位算法-应用科技-哈尔滨.PDFVIP

第 45 卷第 3 期 应 用 科 技 Vol.45 No.3 2018 年 6 月 Applied Science and Technology Jun. 2018 DOI: 10.11991/yykj.201611006 网络出版地址：/kcms/detail/23.1191.U0831.024.html 基于IPSO-HATCH 的北斗相位平滑伪距定位算法 席志红，刁硕，常佳博 哈尔滨工程大学 信息与通信工程学院，黑龙江 哈尔滨 150001 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。 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 中图分类号：TN961 文献标志码：A 文章编号：1009−671X(2018)03−0044−06 Compass carrier-smoothed pseudo-range positioning algorithm based on IPSO-HATCH computer engineering and applications XI Zhihong, DIAO Shuo, CHANG Jiabo College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China Abstract: 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. Keywords: smoothing ps