| 一种改进的低信噪比GPS信号捕获算法 |
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| 引用本文： | 王克成,杨杰,夏继江,万刚. 一种改进的低信噪比GPS信号捕获算法[J]. 大连海事大学学报(自然科学版), 2010, 36(3) |
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| 作者姓名： | 王克成 杨杰 夏继江 万刚 |
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| 作者单位： | 王克成,杨杰,WANG Kecheng,YANG Jie(武汉理工大学,信息工程学院,武汉,430063);夏继江,万刚,XIA Jijiang,WAN Gang(中电科技扬州宝军电子有限公司,江苏,扬州,225003) |
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| 基金项目： | 江苏省科技创新与成果转化项目 |
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| 摘 要： | 为解决传统非相干累加算法难以克服的数据比特反转与平方损失问题,针对低信噪比GPS信号C/A码捕获,研究一种基于相干结果差分共轭乘累加的检测统计方法,实现了相干累加时间的延拓与增益的提高.仿真实验结果表明:在同等条件下捕获-175 dBW信号时,该算法性能明显优于非相干累加算法,可获得约2 dB增益.
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| 关 键 词： | 全球定位系统(GPS)信号 低信噪比 捕获算法 共轭乘累加 |
An improved acquisition algorithm for low SNR GPS signal |
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| WANG Kecheng,YANG Jie,XIA Jijiang,WAN Gang. An improved acquisition algorithm for low SNR GPS signal[J]. Journal of Dalian Maritime University, 2010, 36(3) |
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| Authors: | WANG Kecheng YANG Jie XIA Jijiang WAN Gang |
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| Affiliation: | WANG Kecheng1,YANG Jie1,XIA Jijiang2,WAN Gang2(1.School of Information , Communication Engineering,Wuhan University of Technology,Wuhan 430063,China,2.CETC Yangzhou Baojun Electronic Co.Ltd,Yangzhou 225003,China) |
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| Abstract: | To resolve the problems of GPS date bit transition and square loss,an improved differential correlation multiply integration algorithm was introduced for GPS C/A code under low signal to noise ratio.Simultaneity acquisition time and integration gain request were balanced.Simulation results show that the performance of the proposed algorithm is better than that of non-coherent correlation algorithm,which can get about 2dB gain when capturing the signal-175dBW under the same condition. |
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| Keywords: | global positioning system(GPS)signal low SNR acquisition algorithm correlation multiply integration |
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