| 北斗一号卫星信号高灵敏度捕获方法 |
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| 引用本文： | 张炳琪,陈禾,窦长江,刘峰. 北斗一号卫星信号高灵敏度捕获方法[J]. 北京理工大学学报, 2011, 31(4): 477-481 |
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| 作者姓名： | 张炳琪 陈禾 窦长江 刘峰 |
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| 作者单位： | 北京理工大学信息与电子学院,北京,100081 |
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| 摘 要： | 研究在复杂环境下弱北斗一号卫星信号的捕获方法.利用北斗一号卫星在同一频率上发射两个波束和帧头与卷尾组成已知连续信息序列的特点,可以对两个波束做长时间相干联合捕获.从增加捕获信号功率和减小非相干累加损失两个方面提高捕获灵敏度.仿真和实测结果表明,联合捕获方法可以捕获低于—133 dBm的信号,性能优于单波束串行搜索捕获方法.
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| 关 键 词： | 卫星导航 高灵敏度捕获 北斗一号卫星 |
| 收稿时间： | 2010-06-23 |
A High-Sensitivity Signal Acquisition Method for Compass-1 |
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| ZHANG Bing-qi,CHEN He,DOU Chang-jiang and LIU Feng. A High-Sensitivity Signal Acquisition Method for Compass-1[J]. Journal of Beijing Institute of Technology(Natural Science Edition), 2011, 31(4): 477-481 |
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| Authors: | ZHANG Bing-qi CHEN He DOU Chang-jiang LIU Feng |
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| Affiliation: | School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | An algorithm for acquiring weak signal of Compass-1 is presented. The benefits of Compass-1 signal include two-fold, the first one is that the two-beam signals are transmitted by the satellite at the same frequency, the second one is the prior knowledge of the synch word and the end word of the continues sequence. In so doing, a long period of joint coherent acquisition can be conducted to increase the capture sensitivity by increasing the captured signal power, and also reducing the loss of non-coherent accumulation. Simulation and experimental results show that the joint acquisition method can capture the signal below -133 dBm, which is superior to the single-beam serial search acquisition method. |
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| Keywords: | satellite navigation high-sensitivity acquisition Compass-1 satellite |
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