摘要
根据探月测距的特点,深入分析了侧音测距的原理,提出测距的实现方案。讨论了选择侧音时应考虑的因素,提出测距解模糊实施方案;重点对侧音环进行设计,分析了低信噪比、大传输时延条件下测距实施方案。实际应用表明,采用该方案设计的侧音环捕获性能良好、适合探月测距门限条件下的侧音捕获跟踪;采用该方法侧音匹配解模糊正确,比较适合在探月测控中应用,对下一步的深空测控有很好借鉴作用。
On the basis of the Characteristics of ranging in moon exploration and deep analysis of the principle of tone ranging, a implementation solution is proposed. This paper discussed the factor which must be taken into account for tone selection. Then, a implementation scheme for ambiguity resolution is proposed. The emphasis is the design of tones loop and the implementation scheme of ranging under the condition of low SNR and great time delay. With good performance in ambiguity resolution and tone capture under the threshold conditions, this method is suitable to application in moon exploration and provides good reference for further TT＆C in deep space application.
出处
《无线电工程》
2009年第6期40-41,45,共3页
Radio Engineering
关键词
侧音测距
解模糊
数字锁相环
传输时延
tone ranging
ambiguity resolution
digital phase locked loop
transmission delay
