文章摘要
王永丰,吴永清,蔡惠智.一种多普勒宽容的多址波形[J].声学技术,2008,(1):14~17
一种多普勒宽容的多址波形
A multiaddress waveform with Doppler tolerance
投稿时间:2007-03-20  修订日期:2007-06-21
DOI:
中文关键词: 主动波形  多普勒宽容  HFMCostas
英文关键词: active waveform  Doppler tolerance  HFM Costas
基金项目:
作者单位E-mail
王永丰 中国科学院声学研究所, 北京, 100080
中国科学院研究生院, 北京, 100080 
wyf@water.ac.cn 
吴永清 中国科学院声学研究所, 北京, 100080  
蔡惠智 中国科学院声学研究所, 北京, 100080  
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中文摘要:
      提出了一种具有多址特性、对多普勒宽容的主动波形-HFM-Costas波形。这种波形是通过将宽带双曲调频波形在时间上切分为子脉冲,再根据Costas阵列编码重新排列而成,它结合了Costas编码的多址特性和双曲调频信号的多普勒宽容性。这种波形适于采用相干-非相干混合接收机进行处理,接收机结构简单,计算量小,检测鲁棒性好。详细说明了这种波形的生成方法、相应混合接收机结构,并分析了该波形的主要特性。最后,通过湖上试验进行了验证。
英文摘要:
      A mulitaddress waveform with Doppler tolerance called HFM-Costas waveform is proposed.It is generated by cutting a broadband HFM(hyperbolic frequency modulation) waveform into a sequence of sub-pulses with equal length and rearranging together according to a selected Costas array code.The combined waveform inherits the multiaddress feature of Costas code and the Doppler tolerance charac-teristic of HFM waveform.The waveform can be detected by using a combined receiver with coherent-nocoherent structure which is simple,cost effective and robust in performance.This work first details the technique of generating the waveform along with the combined receiver,and then analyses the major properties of the waveform which are finally verified with real data from a lake trial.
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