| 无人机OFDM系统时频同步方法研究 |
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| 引用本文： | 杨煜慧,王大军. 无人机OFDM系统时频同步方法研究[J]. 无线电工程, 2012, 42(3): 17-20 |
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| 作者姓名： | 杨煜慧 王大军 |
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| 作者单位： | 1. 西安电子科技大学,陕西西安710071／中国电子科技集团公司第五十四研究所,河北石家庄050081
2. 中国人民解放军96637部队,北京,102101 |
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| 摘 要： | 通过对无人机正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)系统时频同步方法分析,对最大似然准则、最大相关准则和基于循环移位的最大相关算法等3种同步算法进行了研究。针对无人机数据链OFDM系统同步传输的特性,提出了一种采用粗同步和细同步相结合的时频联合同步方法。通过仿真结果可以得出,该时频联合同步方法能够达到系统同步范围和同步精度的统一。
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| 关 键 词： | 无人机 OFDM系统 时频联合 同步算法 |
Study of Time and Frequency Synchronization Method for UAV OFDM System |
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| YANG Yu-hui,WANG Da-jun. Study of Time and Frequency Synchronization Method for UAV OFDM System[J]. Radio Engineering of China, 2012, 42(3): 17-20 |
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| Authors: | YANG Yu-hui WANG Da-jun |
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| Affiliation: | 1.Xidian University,Xi＇an Shaanxi 710071,China; 2.The 54th Research Institute of CETC,Shijiazhuang Hebei 050081,China; 3.Unit 96637,PLA,Beijing 710071,China) |
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| Abstract: | Through an analysis on the time and frequency synchronization method of UAV OFDM system,the maximum likelihood criterion,the maximum relativity criterion and the maximum relativity algorithm based on cyclic shift are studied.Based on the characteristics of synchronous transmission of UAV data link OFDM system,a time and frequency joint synchronization method is proposed which combines coarse and fine synchronization.The simulation results indicate that the synchronization range and accuracy of the system can be unified through the time and frequency joint synchronization method. |
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| Keywords: | unmanned aerial vehicle OFDM system time ＆ frequency synchronization algorithm |
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