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巴克码在复合声呐信号中的应用
Simulation on application of Barker code in complex sonar signals
投稿时间:2013-09-17  修订日期:2013-11-01
中文关键词:巴克码  复合信号  模糊函数  Q函数
英文关键词:Barker code  complex signal  ambiguity function  Q function
基金项目:
作者单位
冯 奇 College of MarineNorthwestern Polytechnical UniversityXi’an Shaanxi 710072China 
王英民 College of MarineNorthwestern Polytechnical UniversityXi’an Shaanxi 710072China 
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中文摘要:
      信号波形直接影响着声呐对目标的时延分辨力、频移分辨力、低截获能力及抗混响能力。因此,设计和选择合适的波形对声呐系统有着极其重要的影响。巴克(Barker)码的模糊函数呈理想的“图钉型”,具有良好的时频分辨力。本文利用模糊函数和Q函数,对基于巴克码的复合声呐信号的分辨力、抗混响等性能进行了仿真分析,并和传统的单频矩形脉冲(CW)信号、线性调频脉冲(LFM)信号进行了比较,得出基于巴克码的复合声呐信号能够实现较高的测量精确度,而且在一定的多普勒频移范围内具有较好的抗混响能力,是浅海中主动声呐的优先选择信号。
英文摘要:
      The transmitted waveform directly affects the performance of sonar at range resolution, velocity resolution, low-interception ability and anti-reverberation ability. Therefore, the design and proper selection of waveform show an important significance to sonar system. Barker code, whose ambiguity function is close to ideal thumbtack shape, bears high time-frequency resolution. Resolution and anti-reverberation performance of the complex sonar signals based on Barker code are analyzed by ambiguity function and Q function,and are compared with those of Continuous Waveform(CW) signal and Linear Frequency Modulation(LFM) signal. Simulations indicate that complex sonar signals based on Barker code are featured with a relatively high resolution in range,and a relatively high reverberation suppression,which make them the prioritized waveforms for active sonar operating in shallow water.
引用本文:冯 奇,王英民.巴克码在复合声呐信号中的应用[J].太赫兹科学与电子信息学报,2014,12(4):579~583
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