| GPS弱信号的半比特差分捕获算法 |
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| 引用本文： | 裘勋,卢艳娥. GPS弱信号的半比特差分捕获算法[J]. 电子技术应用, 2012, 38(3): 106-109 |
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| 作者姓名： | 裘勋 卢艳娥 |
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| 作者单位： | 空军工程大学电讯工程学院,陕西西安,710077 |
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| 基金项目： | 国家自然科学基金项目，学院科研创新基金 |
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| 摘 要： | 针对微弱信号情况下,传统的信号捕获方法不能很好地捕获到卫星信号的问题,提出一种半比特差分捕获算法,用于实现对微弱GPS信号的捕获。同时与半比特交替算法进行了比较。通过对一组GPS数据信息的捕获仿真实验,比较捕获效果。结果显示,这种新算法可以捕获到微弱的GPS信号,提高了接收机的灵敏度。
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| 关 键 词： | GPS 捕获 半比特 差分相干 |
Half bits differential acquisition algorithm for GPS weak signals |
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| Qiu Xun , Lu Yan' e. Half bits differential acquisition algorithm for GPS weak signals[J]. Application of Electronic Technique, 2012, 38(3): 106-109 |
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| Authors: | Qiu Xun Lu Yan' e |
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| Affiliation: | Qiu Xun,Lu Yan′e(College of Telecommunication Engineering,Air Force Engineering University,Xi’an 710077,China) |
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| Abstract: | Signal acquisition is the key phase of GPS signal processing.Sometimes,GPS signals are too weak to be received or processed by traditional methods for GPS signals.Nowadays,differential coherent method as a new method for acquisition has been widely used.This paper presents a half bits differential acquisition algorithm for weak signals,and compares the algorithm with alternating half bits algorithm.A GPS data is used to simulate these algorithms,and make a comparison between them.The result shows that the new algorithm can capture the GPS weak signals successfully,and improve the sensitivity of receivers. |
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| Keywords: | GPS acquisition half bits difference coherent |
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