利用查找表的动态载波环路增益控制算法  

Dynamic Carrier Loop Gain Control Algorithm with Look-Up Table

作　　者：胡辉[1] 雷明东[2] 杨保亮[2] 杨守良[2] 

机构地区：[1]华东交通大学信息工程学院,江西南昌330013 [2]重庆文理学院电子电气学院,重庆永川402160

出　　处：《河南科技大学学报（自然科学版）》2015年第2期49-53,59,共6页Journal of Henan University of Science And Technology:Natural Science

基　　金：江西省科技支撑计划基金项目(20123BBE50098);重庆文理学院校级基金项目(Y2014DQ31)

摘　　要：传统的全球卫星导航接收机,由于跟踪环路带宽是固定的,很难在环路动态性和噪声抑制方面达到平衡。针对该问题,本文提出了一种利用查找表的动态载波环路增益控制算法。该算法根据载体运动场景,以二级等差数列对环路增益调节量变化范围进行非均匀量化,建立环路的增益调节量查找表,实现对环路增益和带宽的动态调节。通过Matlab软件接收机进行了测试,测试结果表明:该算法有较好的动态适应性,能显著减少瞬态信号带来的误差跟踪时间,并能有效抑制噪声,在环路动态性和噪声抑制方面达到了较好的平衡。For conventional global navigation satellite system( GNSS) receivers,since the tracking loop bandwidth is fixed,it is difficult to achieve dynamic balance in the loop and noise suppression. To solve the problem,this paper presented a dynamic carrier loop gain control algorithm with the loop-up table. Based on vector sports scene,with two arithmetic sequence,the algorithm quantified the loop gain adjustment in the amount of non-uniform to create a loop gain adjustment value look-up table and dynamically adjust the loop gain and bandwidth. Finally,the algorithm was tested by true Matlab software receiver. Simulation results show that the algorithm has a better dynamic adaptability and can significantly reduce the error tracking time caused by the transient signal and effectively suppress noise. The algorithm can also make loop achieve a better balance between the loop dynamics and noise suppression.

关 键 词：全球卫星导航 增益 查找表 二级等差数列 

分 类 号：TN967.1[电子电信—信号与信息处理]