| 基于圆白卷积的主载波捕获算法 |
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| 引用本文： | 吴建强,詹亚锋,颜学龙,陆建华.基于圆白卷积的主载波捕获算法[J].通信技术,2010,43(1):57-60. |
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| 作者姓名： | 吴建强 詹亚锋 颜学龙 陆建华 |
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| 作者单位： | 1. 桂林电子科技大学电子工程学院,广西,桂林,541004
2. 清华大学宇航技术研究中心,北京,100084 |
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| 基金项目： | 国家973重点基础研究基金，国家自然科学基金，国家高技术研究发展计划(863计划) |
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| 摘 要： | 在基于统一载波体制的深空测控通信中，为了有效消除大调制度下的多普勒频偏，提出一种利用频谱对称性、基于圆自卷积的主载波摘获新算法。首先对已下变频的采样信号做FFT变换计算出信号频谱；然后利用圆自卷积法计算出频谱的对称点，即为主载波频率。仿真分析和FPGA验证表明，该算法能够实现各种调制度下的主载波捕获，解决了深空测控通信中大调制度下的多普勒频偏问题。
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| 关 键 词： | 深空测控通信 主载波捕获 圆自卷积 大调制度 |
An Approach to Main Carrier Acquisition Based on Circular Self-convolution Algorithm |
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| WU Jian-qiang,ZHAN Ya-feng,YAN Xue-long,LU Jian-hua.An Approach to Main Carrier Acquisition Based on Circular Self-convolution Algorithm[J].Communications Technology,2010,43(1):57-60. |
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| Authors: | WU Jian-qiang ZHAN Ya-feng YAN Xue-long LU Jian-hua |
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| Affiliation: | WU Jian-qiang,ZHAN Ya-feng,YAN Xue-long,LU Jian-hua(School of Electronic Engineering,Guilin University of Electronic Technology,Guilin Guangxi 541004,China,Space Center,Tsinghua University,Beijing 100084,China) |
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| Abstract: | In deep space telemetry,telecommand and communication(TT&C) based on universal carrier,a new approach based on circular self-convolution algorithm to eliminating Doppler frequency effectively under large modulation index is proposed,which makes use of symmetrical spectrum for main carrier acquisition.Firstly,the FFT transformation is performed to calculate the signal spectrum after down conversion;then the circular self-convolution algorithm is used to calculate the spectrum symmetrical point,that is,the fr... |
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| Keywords: | deep space TT&C communication main carrier acquisition circular self-convolution large modulation index |
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