文章摘要
姚琳,刘晓东.一种频分MIMO声呐的波达方向估计算法[J].声学技术,2021,40(5):710~716
一种频分MIMO声呐的波达方向估计算法
DOA estimation algorithm based on frequency diverse MIMO sonar
投稿时间:2020-07-27  修订日期:2020-11-23
DOI:10.16300/j.cnki.1000-3630.2021.05.018
中文关键词: 多输入多输出声呐(MIMO)  频率分集  高分辨率  波达方向(DOA)估计
英文关键词: multiple-input multiple-output (MIMO) sonar  frequency diversity  high resolution  direction of arrival (DOA) estimation
基金项目:国家重点研发计划(2016YFC0300300、2016YFC0300802)资助项目。
作者单位E-mail
姚琳 中国科学院声学研究所海洋声学技术中心, 北京 100190
中国科学院大学, 北京 100049 
 
刘晓东 中国科学院声学研究所海洋声学技术中心, 北京 100190
北京市海洋声学装备工程技术研究中心, 北京 100190
中国科学院声学研究所 声场声信息国家重点实验室, 北京 100190 
liuxd@mail.ioa.ac.cn 
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中文摘要:
      为了使声呐阵列在有限的载体空间内获得较高的角度分辨率,设计了基于频率分集的多输入多输出(MultipleInput Multiple-Output,MIMO)声呐。该MIMO声呐采用NM收的布阵方式,接收阵为M元均匀线阵,发射阵由N个阵元组成,且各发射阵元发射中心频率不同、包络相同的窄带信号。建立密集式频分MIMO声呐的回波模型,并以此模型为基础提出了波达方向估计算法方向-相位域多重信号分类(Direction and Phase Domain-Multiple Signal Classification,DPD-MUSIC)算法。仿真实验中以双频MIMO声呐为例,将频分MIMO声呐的DPD-MUSIC算法的估计性能与单输入多输出(Single-Input Multiple-Output,SIMO)声呐MUSIC算法的估计性能进行了对比。仿真结果表明,频分MIMO声呐利用DPD-MUSIC算法可以获得优于等接收阵元数SIMO声呐的角度分辨率和角度估计精度。
英文摘要:
      To improve the angular resolution of sonar in limited carrier space, the frequency diversity based multiple- input multiple-output (MIMO) sonar is proposed. The MIMO sonar is composed of a receiving uniform linear array (ULA) of M-elements and a transmitting ULA of N-elements, which transmit narrowband signals with different center frequencies and the same envelope. In this paper, the signal model of dense frequency division MIMO sonar is established, also the direction and phase domain multiple signal classification (DPD-MUSIC) method, for direction of arrival (DOA) estimation is proposed. Taking dual-frequency MIMO sonar as an example, the performance of DPD-MUSIC algorithm for frequency division MIMO sonar is compared with that of the MUSIC algorithm for single-input multiple-output (SIMO) sonar. Numerical simulation results show that the frequency division MIMO sonar can obtain better angle resolution and DOA estimation accuracy than the SIMO sonar with equal number of receiving elements.
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