Volume 36 Issue 9
Sep.  2010
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Feng Wenquan, Zhang Dezhi. Fast PN code acquisition for satellite spread spectrum transponder[J]. Journal of Beijing University of Aeronautics and Astronautics, 2010, 36(9): 1017-1020. (in Chinese)
Citation: Feng Wenquan, Zhang Dezhi. Fast PN code acquisition for satellite spread spectrum transponder[J]. Journal of Beijing University of Aeronautics and Astronautics, 2010, 36(9): 1017-1020. (in Chinese)

Fast PN code acquisition for satellite spread spectrum transponder

  • Received Date: 13 Jul 2009
  • Publish Date: 30 Sep 2010
  • Large Doppler offsets are inherent to direct spread spectrum signal due to high dynamic environment in low earth orbit satellite communication scenarios. Frequency offset can be dozens of kilohertz, which cause traditional acquisition approach failed to complete PN code acquisition. A part-coherent combined with FFT technique was proposed for this problem. It utilized fast Fourier transform(FFT) to compensate coherent loss resulted by frequency shifts. It simultaneously searched code phases and got Doppler offsets, thus acquisition time could be significantly reduced. Acquisition structure was given, and FFT compensate performance was analyzed. The selection of part-coherent parameters and FFT points were given. Auto adaptive threshold technical was used to realize code acquisition when input signal power varied widely. Theoretical analysis and simulation results verify that the approach can complete fast code acquisition in high Doppler shift and low signal to noise ratio environment, and take up fewer field programmable gate arrays resources.

     

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  • [1] Chawla K K,Sarwate D V.Parallel acquisition of PN sequences in DS/SS systems[J].IEEE Transactions on Communication,1994,42(5):2155-2164 [2] 胡建波,杨莘元,卢满宏.一种基于FFT的高动态扩频信号的快捕方法[J].遥控遥测,2004,25(6):19-24 Hu Jianbo,Yang Xinyuan,Lu Manhong.An FFT based method for fast acquisition of high dynamic DS spread spectrum signals[J].Telemetry & Telecontrol,2004,25(6):19-24(in Chinese) [3] Spangenberg S M.An FFT-based approach for fast acquisition in spread spectrum communication systems[J].Wireless Personal Communications,2000,13(1/2):27-56 [4] 赵琦,薛静,吴智杰.高动态多普勒条件下伪码快速捕获技术[J].数据采集与处理,2008,23(S1):101-104 Zhao Qi,Xue Jing,Wu Zhijie.Fast PN code acquisition technology research in high dynamic doppler shift situation[J].Journal of Data Acquisition & Processing,2008,23(S1):101-104 (in Chinese) [5] 刘艳华,赵刚.基于PMF-FFT的PN码捕获方法及性能[J].通信技术,2009,42(1):24-26 Liu Yanhua,Zhao Gang.Analysis on PMF-FFT based acquisition of PN code [J].Communications Technology,2009,42(1):24-26 (in Chinese) [6] 郭肃丽,刘云飞.一种基于FFT的伪码快捕方法[J].无线电通信技术,2003,29(1):11-13 Guo Suli,Liu Yunfei.An FFT-based approach for the fast acquisition of PN code [J].Radio Communication Reference,2003,29(1):11-13(in Chinese) [7] 胡建波.高动态扩频信号快速捕获方法的研究[D].哈尔滨:哈尔滨工程大学信息与通信工程学院,2005 Hu Jianbo.Research on fast acquisition method of high dynamic DS_SS signals[D].Harbin:School of Information and Communication,Harbin Engineering University,2005 (in Chinese)
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