| GNSS-R接收机信号捕获算法设计 |
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| 引用本文： | 腾小霁,孙越强,吴迪,陶鹏.GNSS-R接收机信号捕获算法设计[J].科学技术与工程,2010,10(10). |
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| 作者姓名： | 腾小霁 孙越强 吴迪 陶鹏 |
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| 作者单位： | 1. 中国科学院空间科学与应用研究中心,北京,100190;中国科学院研究生院,北京,100049
2. 中国科学院空间科学与应用研究中心,北京,100190 |
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| 摘 要： | 在GNSS—R接收机的信号处理过程中,由于卫星和接收机之间的相对运动会产生较大的多普勒频移,同时大多数情况下接收机只能接收到比较弱的信号。而针对信号的这些特点,提出了一种对信号进行捕获的设计方法。用快速傅立叶变换(FFT)捕获算法将接收信号和本地再生伪码在时域的相关计算转换成频域的相乘计算,从而大大减少捕获时间,并用非相干积累的方法提高系统对于信号的捕获能力。同时,在这些计算完成之后,通过使用搜索检测器来保证在捕获概率变化较小的情况下,降低总的虚警概率。
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| 关 键 词： | GNSS—R接收机 FFT快速捕获 非相干积累 tong检测器 |
| 收稿时间： | 1/5/2010 2:51:29 PM |
| 修稿时间： | 1/19/2010 3:37:46 PM |
Signal Acquisition Algorithm Design for GNSS-R Receiver |
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| teng xiaoji,Sun Yueqiang,Wu Di and Tao Peng.Signal Acquisition Algorithm Design for GNSS-R Receiver[J].Science Technology and Engineering,2010,10(10). |
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| Authors: | teng xiaoji Sun Yueqiang Wu Di and Tao Peng |
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| Institution: | Center for Space Science and Applied Research/a>;Chinese Academy of Sciences1/a>;Beijing 100190/a>;P.R.China/a>;Graduate school of the Chinese Academy of Sciences2/a>;Beijing 100049/a>;P.R.China |
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| Abstract: | The relative movement between the satellites and the receivers will cause the Doppler frequency shift that can reach 10 kHz in the process of digital signal processing,and the received signal will be weak.So a design method is presented,which uses FFT algorithm to implement time-domain correlation between received signals and local regenerated signals by frequency-domain spectrum multiplication,so that the acquisition time can be decreased significantly,then uses non-coherent integration to increase the cap... |
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| Keywords: | GNSS-R Receiver FFT- Acquisition non-coherent integration searching detector Tong-detector |
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