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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

DOI: 10.13190/jbupt.201004.49.wangyq, PP. 49-53

Keywords: 航天器,应答机,直接序列扩频,伪码跟踪环

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Abstract:

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.

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