两种卫星导航抗干扰算法对载波相位测量精度影响分析  

Analysis of Carrier Phase Measurement Accuracy of Two Satellite Navigation Anti-jam Algorithms

作　　者：居后鸿 曾庆化[1] 岳亚洲[2] 张会锁[2] 寇磊[2] 

机构地区：[1]南京航空航天大学自动化学院导航研究中心,江苏南京210016 [2]中航工业西安飞行自动控制研究所,陕西西安710065

出　　处：《全球定位系统》2015年第1期13-16,共4页Gnss World of China

基　　金：国家自然科学基金(批准号:61374115;61328301;61104188;61273057;61174197);江苏高校优势学科建设工程项目

摘　　要：PI算法与LCMV算法是被深入研究与广泛应用的两种抗干扰算法,若信号经过两种算法处理后产生相延迟,则会给载波相位的测量带来误差,从而影响载波相位差分精度。简要介绍了相延迟以及PI算法与LCMV算法,并通过算法公式分析得出PI算法会随干扰输入信号和卫星信号方向的变化而变化,而LCMV算法则不会因输入信号和卫星信号的变化产生相延迟。利用MATLAB仿真平台,仿真出干扰环境下PI算法与LCMV算法产生的相延迟,通过仿真结果分析验证两种算法对于载波相位测量精度的影响。PI algorithm and LCMV algorithm are two deeply studied and widely used an- ti-jam algorithms. If phase delay emerges after signals are processed by the two algorithms, it will bring carrier phase measurement error, which will affect carrier phase difference accu- racy. This paper introduces phase delay and PI/LCMV algorithms briefly, and, by analyzing algorithm expressions, reaches a conclusion that phase delay of PI algorithm will change when input signal and satellite signal direction change, while LCMV algorithm will not bring phase delay with the presence of signal changes. It simulates phase delay of PI algorithm and LCMV algorithm under jamming environment through MATLAB, verifies and analyzes the effects of the carrier phase measurement accuracy using the two algorithms.

关 键 词：星导航 载波相位 相延迟 PI算法 LCMV算法 

分 类 号：P228.4[天文地球—大地测量学与测量工程]