| 星间链路发射机时延零值的数字标定算法 |
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| 引用本文： | 崔小准,康成斌,刘安邦,刘崇华,刘天雄.星间链路发射机时延零值的数字标定算法[J].宇航学报,2014,35(9):1044-1049. |
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| 作者姓名： | 崔小准 康成斌 刘安邦 刘崇华 刘天雄 |
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| 作者单位： | 中国空间技术研究院总体部，北京 100094 |
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| 基金项目： | 国家重大专项基金项目（DHZXO1A02008） |
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| 摘 要： |
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| 关 键 词： | 导航卫星 星间链路 发射机 时延 标定 |
| 收稿时间： | 2013-09-02 |
Digital Calibration Algorithm for the Delay of Crosslink Transmitter |
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| CUI Xiao zhun,KANG Cheng bin,LIU An bang,LIU Chong hua,LIU Tian xiong.Digital Calibration Algorithm for the Delay of Crosslink Transmitter[J].Journal of Astronautics,2014,35(9):1044-1049. |
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| Authors: | CUI Xiao zhun KANG Cheng bin LIU An bang LIU Chong hua LIU Tian xiong |
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| Affiliation: | China Academy of Space Engineering, Beijing 100094，China |
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| Abstract: | The traditional absolute calibration based on oscilloscopic observation is not suitable for crosslink transmitter. A new calibration algorithm is developed by using a digital signal processing technique. The output signal of crosslink transmitter and the pulse per second signal are sampled in synchronization. At first, the delay reference is determined according to straight line fitting for the signal level stepping segment. The sampling data of crosslink transmitting signal is decimated and then phase acquisition processing is made to determine the initial synchronization point. A fine search for the start of the pseudo random code has been processed between front and rear of the initial synchronization point. Finally, the transmitter delay can be obtained according to the sampling frequency and the calibration delay of the test cable and attenuator. Compared with the oscilloscopic observation method, the analysis and test results show that the proposed technique has overcome the faults caused by whole chip ambiguity and the calibration accuracy can be improved by an order of magnitude. |
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| Keywords: | Navigation satellite Crosslink Transmitter Delay Calibration |
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