航天器扩频测控应答机伪码跟踪环的研究与设计

doi:10.13190/jbupt.201004.49.wangyq

北京邮电大学学报 ›› 2010, Vol. 33 ›› Issue (4): 49-53.doi: 10.13190/jbupt.201004.49.wangyq

航天器扩频测控应答机伪码跟踪环的研究与设计

王永庆¹,高磊²,吴嗣亮²

1. 北京理工大学 2. 上海航天技术研究院 804所

收稿日期:2009-08-24 出版日期:2010-08-28 发布日期:2010-05-21
通讯作者: 王永庆 E-mail:wangyongqing@bit.edu.cn

Design of Code Tracking Loop for Spacecraft TT&C Transponder

Received:2009-08-24 Online:2010-08-28 Published:2010-05-21

摘要/Abstract

摘要：

为了满足直接序列扩频体制下航天器测控应答机的需求，对伪码跟踪环进行了研究. 提出了一种新的全数字伪码跟踪环：采用新的超前滞后鉴别器，再生伪码相位精确可控的伪码发生器，环路自适应调整相关间距和环路带宽，解决了伪码跟踪环的入锁时间、收敛范围与跟踪精度之间的矛盾，并采用分时复用的方式实现鉴别、滤波等计算功能. 仿真和实测结果均验证了研究的有效性，已成功应用于某航天工程.

关键词: 航天器, 应答机, 直接序列扩频, 伪码跟踪环

Abstract:

In order to meet requirements of spacecraft tracking, telemetry and command (TT&C) transponder in direct sequence spread spectrum system, the code tracking loop is investigated. A new code tracking loop is presented which adopts a new kind of dot product power discriminator and a new pseudocode generator in which the phase can be accurately adjusted. Moreover, the related distance and bandwidth of code tracking loop will adaptively switch to solve the contradictions between locked timers, convergence range and tracking accuracy. Furthermore, a new implementation method of code tracking loop is proposed in which discriminator and loop filter are timesharing same arithmetic unit. Simulations and measurements are given.

Key words: spacecraft, transponder, direct sequence spread spectrum, code tracking loop

中图分类号:

V443+.2

王永庆,高磊,吴嗣亮. 航天器扩频测控应答机伪码跟踪环的研究与设计[J]. 北京邮电大学学报, 2010, 33(4): 49-53.

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航天器扩频测控应答机伪码跟踪环的研究与设计

Design of Code Tracking Loop for Spacecraft TT&C Transponder

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