| 程萍,陈建峰,马驰,张竹.十字阵短时宽带声源实时定向算法[J].,2012,31(2):123-129 |
| 十字阵短时宽带声源实时定向算法 |
| A fast short-time broadband acoustic source direction estimation algorithm using cross array |
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| 中文摘要: |
| 面向短时宽带声源实时定向问题,提出了一种基于互功率谱时延估计的十字阵定向优化算法。针对该方法估计结果离散且呈不均匀分布的特点,将观测平面划分为四个测量区域,并利用不同阵元组合分别处理,解决实时性与估计成功率的矛盾;依据互相关函数的特点,设计了若干判断准则,排除由于数据取样短造成的异常时延估计,改善算法的可靠性;采用频域插值方法,一定程度上提高时延估计精度,从而提高定向精度。MATLAB仿真和DSP系统实验表明,这种方法在实际应用中有效提高了对短时宽带声源定向的性能。 |
| 英文摘要: |
| This paper proposes a passive direction estimation optimization method for the short-time broadband acoustic source.Due to the non-uniform distribution of the Time Delag of Arrival(TDOA) estimates,this method divides the whole plane into four parts,and then separately calculates the source bearing in each part using an algorithm based on Crosspower-Spectrum Phase(CSP).Interpolation in frequency domain is used to improve the direction estimation accuracy.Several criterions are introduced to eliminate the abnormal TDOA resulting from short sampling,as well as improve the real-time performance.Good real-time performance and reliability are verified by the MATLAB simulation and DSP experiment. |
| DOI：10.11684/j.issn.1000-310X.2012.02.010 |
| 中文关键词: 定向 时延估计 互谱 十字阵 实时性 互相关函数 |
| 英文关键词: Direction estimation Time Delag of Arrival(TDOA) Crosspower-Spectrum Phase(CSP) Cross array Real-time Cross-correlation function |
| 基金项目:教育部博士点基金(20096102120013) |
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| 摘要点击次数: 2747 |
| 全文下载次数: 583 |
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