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论文:2013,Vol:31,Issue(3):446-450 |
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引用本文： |
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姚如贵, 冯泽明, 赵雨, 王伶. 基于FFT的时频并行捕获算法研究[J]. 西北工业大学 |
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Yao Rugui, Feng Zeming, Zhao Yu, Wang Ling. Proposing a Fast Time-Frequency-Domain Parallel Acquisition Algorithm Based on FFT[J]. Northwestern polytechnical university |
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| 基于FFT的时频并行捕获算法研究 |
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| 姚如贵1, 冯泽明1, 赵雨2, 王伶1 |
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1. 西北工业大学 电子信息学院, 陕西 西安 710072;
2. 中煤地(西安) 视讯有限公司, 陕西 西安 710075 |
| 摘要: |
| 在扩频通信系统中,PN码的捕获是系统正常工作的前提。为了进一步实现快速捕获,研究了基于FFT的时频并行捕获算法,利用FFT实现频域并行捕获、利用多通道实现码域并行捕获。理论推导验证了该算法的正确性,分析了该算法捕获精度、捕获速度、实现复杂度以及低通滤波效应。仿真结果进一步验证了该算法捕获的正确性。基于FFT的时频并行捕获算法在不降低精度的前提下,可以有效提高捕获速度。 |
| 关键词:
C/A码
FFT
捕获
并行算法
扩频通信
计算机仿真
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| Proposing a Fast Time-Frequency-Domain Parallel Acquisition Algorithm Based on FFT |
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| Yao Rugui1, Feng Zeming1, Zhao Yu2, Wang Ling1 |
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1. Department of Electronics Engineering,Northwestern Polytechnical University,Xi'an 710072,China;
2. ZhongMeiDi ShiXun Co.Ltd.,Xi'an 710075,China |
| Abstract: |
| The acquisition of PN codes plays an important part in the Spread Spectrum Communication Systems.In order to accelerate the procedure of acquisition, we study parallel acquisition algorithm, which concurrently per-forms frequency domain searching with FFT and time domain searching with multi channels.And the theoretical de-duction result validates the correctness.Further analysis on precision, speed, complexity and low-pass effect re-veals the superiority.Finally we demonstrate the feasibility from the aspect of simulation.From the theoretical anal-ysis and simulation verification, we can conclude that the proposed parallel acquisition algorithm can accelerate the acquisition without the sacrifice of precision. |
| Key words:
computer simulation
fast Fourier transforms
parallel algorithms
spread spectrum communication
acquisition
C/A code
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| 收稿日期: 2012-09-13
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金(61271416);西北工业大学基础研究基金(JCY20130132);西北工业大学科技创新基金(2012KJ01006)资助 |
| 通讯作者:
Email： |
| 作者简介: 姚如贵(1980-),西北工业大学副教授、博士,主要从事无线通信技术、通信与导航系统抗干扰技术等研究。
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| 相关功能 |
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| 作者相关文章 |
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| 姚如贵 在本刊中的所有文章 |
| 冯泽明 在本刊中的所有文章 |
| 赵雨 在本刊中的所有文章 |
| 王伶 在本刊中的所有文章 |
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参考文献: |
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[1] Kai Borre, Dennis M Akos, et al.A Software-Defined GPS and Galileo Receiver: A Single-Frequency Approach.New York: Birkhuser, Boston, 2007
[2] Khan R, Khan S U, Zaheer R, Khan S.Acquisition Strategies of GNSS Receiver.2011 International Conference on Computer Networks and Information Technology, 2011, 119-124
[3] Zheng Yuying.A Software-Based Frequency Domain Parallel Acquisition Algorithm for GPS Signal.2010 International Conference on Anti-Counterfeiting Security and Identification in Communication, 2010, 298-301
[4] Qiu Lei, Li Lei.GPS Signal Acquisition Based on FFT.2010 Second International Conference on Information Technology and Computer Science, 2010, 110-113
[5] Xu Baowen, Cai Tijing.C/A Code of GPS Software Receiver Fast Acquisition Based on FPGA.International Conference on Electric Information and Control Engineering, 2011, 4030-4033
[6] Liu Chang, Zhang Jun, Zhu Yanbo, Pan Qingge.Analysis and Optimization of PMF-FFT Acquisition Algorithm for High-Dynamic GPS Signal.IEEE 5th International Conference on Cybernetics and Intelligent Systems, 2011, 185-189 |
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