| 互相关干扰下的GNSS弱信号检测算法 |
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| 引用本文： | 何文涛,徐建华,叶甜春.互相关干扰下的GNSS弱信号检测算法[J].电子学报,2011,39(2):471-475. |
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| 作者姓名： | 何文涛 徐建华 叶甜春 |
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| 作者单位： | 中国科学院微电子研究所;杭州中科微电子有限公司; |
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| 基金项目： | 国家863高技术研究发展计划(No.2007AA12Z344) |
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| 摘 要： | GNSS接收机在室内等环境中的应用要求接收机具有接收弱信号的能力.在检测弱信号时,接收机可能由于受到强信号的互相关干扰而错误的捕获或跟踪到强信号的互相关峰.本文采用相干和非相干积分组合的方法来提高灵敏度.同时,通过估计强信号的互相关干扰功率,自动调整检测门限来抑制互相关干扰.仿真结果说明,采用20ms的相干积分和1s的...
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| 关 键 词： | GNSS接收机 弱信号 高灵敏度 互相关干扰 |
| 收稿时间： | 2009-10-15 |
Detection of GNSS Weak Signal in Cross Correlation Interference |
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| HE Wen-tao,XU Jian-hua,YE Tian-chun.Detection of GNSS Weak Signal in Cross Correlation Interference[J].Acta Electronica Sinica,2011,39(2):471-475. |
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| Authors: | HE Wen-tao XU Jian-hua YE Tian-chun |
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| Institution: | HE Wen-tao1,XU Jian-hua1,2,YE Tian-chun1(1.Institute of Microelectronics of Chinese Academy of Sciences,Beijing 100029,China,2.Hangzhou Zhongke Microelectronics Co.,Ltd,Hangzhou,Zhejiang 310053,China) |
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| Abstract: | GNSS receivers are required to be capable of receiving weak signals to satisfy indoor Applications.When detecting weak signals,the receiver may falsely acquire or track the cross correlation peaks of strong signals due to the cross correlation interference.Coherent and non-coherent integration are combined to improve the reception sensitivity.Meanwhile,the detection threshold is adjusted automatically by estimating the cross correlation interference power from strong signals to mitigating cross correlation ... |
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| Keywords: | GNSS receiver weak signal high sensitivity cross correlation interference |
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