| 基于Walsh变换的GPS C/A码快速捕获算法 |
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| 引用本文： | 李仰志,程剑,吕晶,李广侠,李志强.基于Walsh变换的GPS C/A码快速捕获算法[J].电子学报,2011,39(6):1384-1388. |
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| 作者姓名： | 李仰志 程剑 吕晶 李广侠 李志强 |
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| 作者单位： | 解放军理工大学通信工程学院卫星通信重点实验室; |
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| 基金项目： | 国家高技术研究发展计划(863计划)课题(No.2008AA12Z307); 国家自然科学基金(No.61032004) |
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| 摘 要： | 根据m序列的相移组合多项式,给出Walsh序列与m序列行对应关系的计算方法.利用Walsh序列与Gold序列的映射关系,提出利用移位相加电路减小矩阵运算量的方法,解决Gold序列的快速相关运算问题.采用连续帧相关的方法,消除导航信号符号跳变对相关运算的影响,同时,针对GPS卫星码字的特点,提出了一种多星捕获方法,利用第...
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| 关 键 词： | 捕获 快速Walsh变换 GPS C/A码 |
| 收稿时间： | 2010-05-18 |
The Fast GPS C/A Code Acquisition Algorithm Based on Walsh Transform |
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| LI Yang-zhi,CHENG Jian,L Jing,LI Guang-xia,LI Zhi-qiang.The Fast GPS C/A Code Acquisition Algorithm Based on Walsh Transform[J].Acta Electronica Sinica,2011,39(6):1384-1388. |
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| Authors: | LI Yang-zhi CHENG Jian L Jing LI Guang-xia LI Zhi-qiang |
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| Affiliation: | LI Yang-zhi,CHENG Jian,Lü Jing,LI Guang-xia,LI Zhi-qiang(Key Laboratory of Satellite Communications,PLA University of Science and Technology,Nanjing,Jiangsu 210007,China) |
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| Abstract: | The relationship between the rows of Walsh and m sequence matrix is presented depending on the polynomial produce phase shift of m sequence.By using a mapping relation between Gold sequences and Walsh sequences,a fast algorithm is proposed to deal with the problems lying in fast correlation of Gold sequence.The algorithm utilizes the shift accumulator to reduce the computation cost.A consecutive frame correlation method is investigated to solve the influence of data bit transition on correlation.A multi-sat... |
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| Keywords: | acquisition fast walsh transform GPS C/A code |
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