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陈华伟, 赵俊渭, 郭业才, 蔡宗义, 许学忠. 二次加权频域自适应时延估计算法与应用[J]. 声学学报, 2003, 28(1): 61-65. DOI: 10.15949/j.cnki.0371-0025.2003.01.012
引用本文: 陈华伟, 赵俊渭, 郭业才, 蔡宗义, 许学忠. 二次加权频域自适应时延估计算法与应用[J]. 声学学报, 2003, 28(1): 61-65. DOI: 10.15949/j.cnki.0371-0025.2003.01.012
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CHEN Huawei, ZHAO Junwei, GUO Yecai, CAI Zongyi, XU Xuezhong. Quadratic weighting of the frequency domain adaptive time delay estimation and its application[J]. ACTA ACUSTICA, 2003, 28(1): 61-65. DOI: 10.15949/j.cnki.0371-0025.2003.01.012
Citation: CHEN Huawei, ZHAO Junwei, GUO Yecai, CAI Zongyi, XU Xuezhong. Quadratic weighting of the frequency domain adaptive time delay estimation and its application[J]. ACTA ACUSTICA, 2003, 28(1): 61-65. DOI: 10.15949/j.cnki.0371-0025.2003.01.012
shu

二次加权频域自适应时延估计算法与应用

Quadratic weighting of the frequency domain adaptive time delay estimation and its application

    摘要
  • 摘要: 时延估计问题在许多工程应用中具有重要的意义。本文提出了一种二次加权频域自适应时延估计模型,给出了二次加权频域SCOT和ML自适应时延估计算法,推导了二次加权频域SCOT自适应时延估计的方差。把该算法应用于对武装直升机的声测无源定位中,用实测直升机噪声数据进行了计算机仿真。结果表明,在低信噪比情况下,二次加权频域自适应时延估计具有更好的时延估计性能。

     

    Abstract: Time delay estimation (TDE) plays an important role in many engineering applications. In this paper a quadratic weighting of the frequency domain adaptive time delay estimation method is put forward. The quadratic weighting of the frequency domain SCOT and ML adaptive TDE algorithms are presented, respectively. The variance of the quadratic weighting of the frequency domain SCOT adaptive algorithm is derived. The algorithms are applied in the TDE of helicopter passive acoustic location. The simulation results show that the proposed algorithm has better performance in the low signal to noise ratio.

     

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