载波频率号提取算法对箭载GLONASS速度计算的影响  

Effect of Carrier Frequency Number Picking-up Algorithm on Rocket GLONASS Velocity Calculation

作　　者：饶爱水[1] 张龙[1] 王振平[1] 汪毅[1] 

机构地区：[1]中国卫星海上测控部,江苏江阴214431

出　　处：《电讯技术》2015年第2期187-192,共6页Telecommunication Engineering

摘　　要：在GLONASS测速原理的基础上,研究了载波频率号解算方法对箭载GLONASS测速的影响,发现载波频率号解算方法错误将导致测速精度变差,并从理论上分析了载波频率号错误引起的测速精度误差为目标飞行速度的1/2850-1/220倍.设计了4种不同的载波频率号解算算法,采用火箭飞行试验数据对算法进行了测试,结果表明,通过卫星数判断载波频率号以及通过保留位判断载波频率号能获得正确结果,直接计算载波频率号以及丢弃保留串无法获取到全部正确结果;通过保留位判断载波频率号的算法具有最小的首次测速时间,比通过卫星数判断载波频率号的算法至少缩短30s以上,载波频率号解算错误引起的测速精度误差与理论值分析基本一致.According to the principle of velocity determination using Global Navigation Satellite System（GLONASS）,the effect of carrier frequency number picking-up algorithm on rocket GLONASS velocitydetermination is studied and it is found that the precision of velocity becomes worse if the algorithm of fre-quency number is inaccurate,and the error of precision caused by inaccurate frequency number is 1/2850to 1/220 of the object＇s velocity. Four algorithms are designed and tested by using the trial data of rocketlaunching. The result shows that the the algorithm of calculating carrier frequency number by satellite num-ber and calculating carrier frequency number by reserve bits can acquire an accurate result,and the algo-rithm of immediately calculating carrier frequency number and abandoning reserve string can acquire an in-accurate resul. The algorithm of calculating carrier frequency number by reserve bits has the least time offirst velocity measurement,and gets 30 seconds better compared with that of the algorithm of calculatingcarrier frequency number by satellite number. The error of velocity precision caused by wrong frequencynumber is consistent with theoretical analysis.

关 键 词：GLONASS 导航电文 频道号 速度精度 运载火箭 实时定位 

分 类 号：TN967.1[电子电信—信号与信息处理]