| 一种用于GPS信号快速捕获的自适应算法 |
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| 引用本文： | 李金海,巴晓辉,SHERAZ Anjum,陈杰. 一种用于GPS信号快速捕获的自适应算法[J]. 电子器件, 2007, 30(3): 1024-1027 |
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| 作者姓名： | 李金海 巴晓辉 SHERAZ Anjum 陈杰 |
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| 作者单位： | 1. 中国科学院微电子研究所,北京,100029
2. COMSATS Institute of Information Technology,Pakistan |
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| 摘 要： | 采用聂孟-皮尔逊准则,以发现概率为性能指标,对基于FFT非相干累加的GPS信号捕获算法的性能进行了详细的理论推导,给出了该种方法的理论性能上界, 提出了一种用于快速捕获的高效自适应算法,并通过系统仿真对理论结果进行了验证.对实际情况中概率分布的合理近似使理论分析过程得以简化,并使判决门限可根据噪声方差及累加次数进行自适应调整的算法可以直接应用于实时GPS接收机的设计.
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| 关 键 词： | 自适应算法 快速捕获 GPS FFT adaptive algorithm fast acquisition GPS FFT |
| 文章编号： | 1005-9490（2007）03-1024-04 |
| 修稿时间： | 2006-06-29 |
An Adaptive Algorithm for Fast Acquisition of GPS Signals |
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| LI Jin-hai,BA Xiao-hui,SHERAZ Anjum,CHEN Jie. An Adaptive Algorithm for Fast Acquisition of GPS Signals[J]. Journal of Electron Devices, 2007, 30(3): 1024-1027 |
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| Authors: | LI Jin-hai BA Xiao-hui SHERAZ Anjum CHEN Jie |
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| Affiliation: | 1. Institute of Microelectronic of Chinese Academy of Sciences, Beijing 100029, China;2. COMSATS Institute of Information Technology ,Pakistan |
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| Abstract: | An efficient adaptive algorithm for a non-coherent fast acquisition of the Global Positioning System(GPS) signals is presented.The theoretical performance derivation is performed by reasonable approximation of the probability density function of the detection variables.The proposed algorithm shows a good performance in terms of the detection probability as confirmed by simulations.The efficiency of the algorithm makes it a good candidate for practical implementation in real time GPS receivers. |
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| Keywords: | adaptive algorithm fast acquisition GPS FFT |
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