高动态条件下测控系统载波跟踪环路优化设计  

Optimization of TT&C Carrier Tracking Loop in Dynamic Environments

作　　者：陈竹[1] 王元钦[1] 侯孝民[1] 

机构地区：[1]装备指挥技术学院,北京101416

出　　处：《电讯技术》2010年第8期57-62,共6页Telecommunication Engineering

摘　　要：航天测控系统中载波跟踪误差主要来源于热噪声和航天器动态应力,对载波跟踪环路的优化一般通过调整环路等效噪声带宽来实现。分析了航天测控系统中航天器的动态应力特性及环路跟踪误差特性,导出由载噪比和动态应力决定的环路最佳带宽表达式,提出一种通过环路自身状态估计载噪比和动态应力的方法,通过对载噪比和动态应力的实时估计实现对环路参数的实时调整。仿真结果表明,该算法在动态应力和载噪比时变的高动态场合可以实现稳定的载波跟踪,测量精度得到明显改善。The carrier tracking error in TT＆C（Telemetry, Tracking and Command） system is the thermal noise error and dynamic stress error. Loop bandwidth adjustment is the general mostly comprised of way to optimum the performance of the carrier tracking loop. Based on the analysis of spacecraft dynamic characteristic and the error characteristic of carrier loop, an optimal loop bandwidth which can yield the minimum error in specified carrier -to- noise ratio and dynamic stress is presented. Additionally, an estimation method which can extract the carrier- to - noise ratio and dynamic stress real time from the carrier tracking loop itself is developed. By detecting the carrier- to - noise ratio and dynamic stress, the loop parameter is adjusted adaptively to minimize the tracking error. The simulation result shows that the algorithm is efficient to improve the precision of carrier tracking in high dynamic circumstance.

关 键 词：测控系统 载波跟踪 最佳等噪声带宽 载噪比 动态应力 

分 类 号：TN964[电子电信—信号与信息处理]