| 混合扩频测控体制下高精度测速研究 |
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| 引用本文： | 施磊,苟先太,草婷,吴潜. 混合扩频测控体制下高精度测速研究[J]. 通信技术, 2011, 44(7): 96-98 |
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| 作者姓名： | 施磊 苟先太 草婷 吴潜 |
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| 作者单位： | 1. 西南交通大学电气工程学院,四川,成都,610031
2. 中国西南电子技术研究所,四川,成都,650000 |
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| 摘 要： | 针对具有大多普勒偏移的DS-FH/MSK信号进行捕获和多普勒偏移估计问题,介绍采用匹配FFT技术对载波进行粗估计,采用FFT频谱细化算法对载波多普勒频移进行精估计的方法。在较短的时间内同步系统的同时,对多普勒偏移进行高精度的估计和补偿。该方法对载波的多普勒频移的粗略估计能解决载波同步的问题,而对多普勒偏移的精确估计能解决测速问题。通过仿真表明,该方法能更快,更高精度地完成多普勒频移的估计,从而完成测控体制下高精度测速的要求。
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| 关 键 词： | 混合扩频测控 多普勒偏移测速 匹配快速傅里叶变换 快速跳频 |
Study on Highly-Accurate Speed Measurement for DS-FH/MSK TT&C |
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| SHI Lei,GOU Xian-tai,CAO Ting,WU Qian. Study on Highly-Accurate Speed Measurement for DS-FH/MSK TT&C[J]. Communications Technology, 2011, 44(7): 96-98 |
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| Authors: | SHI Lei GOU Xian-tai CAO Ting WU Qian |
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| Affiliation: | ② (①College of Electrical Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China; ②Southwest Institute of Electronic Technology,Chengdu Sichuan 650000,China) |
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| Abstract: | Coarsely estimation method based on match filter in combination with FFT is proposed,thus to solve the problem of large Doppler shifts in the course of DS-FH/MSK signal acquisition,and with FFT-based spectrum zoom frequency measurement,implement accurate estimation.The method in combination with the merit of estimation and compensation,could reduce the time and raise the precision,while the Doppler frequency is emplyed for speed measurement.Simulation result indicates that the proposed method could reduce r... |
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| Keywords: | DS-FH/MSK Doppler speed measurement MF-FFT FFH |
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