| 改进的互功率谱相位时延估计方法 |
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| 引用本文： | 马晓红, 陆晓燕, 殷福亮. 改进的互功率谱相位时延估计方法[J]. 电子与信息学报, 2004, 26(1): 53-59. |
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| 作者姓名： | 马晓红 陆晓燕 殷福亮 |
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| 作者单位： | 大连理工大学电子与信息工程学院,大连,116024;大连理工大学电子与信息工程学院,大连,116024;大连理工大学电子与信息工程学院,大连,116024 |
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| 摘 要： | 互功率谱相位是一种常用的时延估计方法,该方法在弱噪声和中度以下混响的环境下,可以获 得比较精确的时廷估计值;但在低信噪比和强混响的环境下,该方法的性能急剧下降,针对这一问题,本文 提出了一种改进的互功率谱相位时延估计方法。计算机模拟结果表明,改进后的方法即使在低信噪比和强混 响的环境下,也可以获得令人满意的时延估计值。
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| 关 键 词： | 传声器阵列 互功率谱相位 时延估计 |
| 文章编号： | 1009-5896(2004)01-0053-07 |
| 收稿时间： | 2002-07-22 |
| 修稿时间： | 2002-07-22 |
Time Delay Estimation by Using Modified Crosspower Spectrum Phase Technique |
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| Ma Xiao-hong, Lu Xiao-yan, Yin Fu-liang. Time Delay Estimation by Using Modified Crosspower Spectrum Phase Technique[J]. Journal of Electronics & Information Technology, 2004, 26(1): 53-59. |
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| Authors: | Ma Xiao-hong Lu Xiao-yan Yin Fu-liang |
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| Affiliation: | School of Electron. and Info. Eng.; Dalian Univ. of Tech.; Dalian 116024; China |
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| Abstract: | The Crosspower Spectrum Phase (CSP) technique is a well known time delay estimation method. A relatively precise time delay estimation can be achieved by using it in the environment of weak noise and medium reverberation. The performance degrades sharply in the environment of low SNR and strong reverberation. The modified CSP algorithm is proposed in order to improve the performance of CSP. The weighting function of the proposed CSP method changes with the variation of SNR, and the time delay of arrival is accomplished via a weighted function of frames of CSP. Computer simulation results indicate that the proposed method will give satisfactory value of time delay estimation even in the environment of low SNR, and strong reverberation. |
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| Keywords: | Microphone array Crosspower spectrum phase Time delay estimation |
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