| 基于二次相关的时延估计方法研究 |
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| 引用本文： | 杜娟,程擂.基于二次相关的时延估计方法研究[J].弹箭与制导学报,2010,30(6). |
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| 作者姓名： | 杜娟 程擂 |
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| 作者单位： | 中北大学电子测试技术国家重点实验室,太原,030051 |
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| 摘 要： | 以空间任意多元传感器阵列为模型,以被动定位算法为基础,针对传统时延估计方法中的互相关算法存在着估计精度不高的问题,提出了一种基于二次相关的时延估计方法。该方法首先对信号作自相关提高信噪比,再将自相关函数和互相关函数作相关处理得到时延值。理论和实验结果都表明:相对于传统的互相关时延估计方法,二次相关法可以明显的抑制噪声对信号时延估计的影响,提高时延估计的精度。
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| 关 键 词： | 广义互相关 二次相关 时延估计 |
Time-delay Estimation Based on Second Correlation |
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| DU Juan,CHENG Lei.Time-delay Estimation Based on Second Correlation[J].Journal of Projectiles Rockets Missiles and Guidance,2010,30(6). |
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| Authors: | DU Juan CHENG Lei |
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| Affiliation: | DU Juan,CHENG Lei (National Key Laboratory for Electronic Measurement Technology,North University of China,Taiyuan 030051,China) |
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| Abstract: | A time delay method estimated by the second correlation has been raised compared with the low precision of traditional methods.This method is based on the model of arbitrary multi-sensor array in space and the passive localization algorithm.Firstly, it makes an auto-correlation of the signal in order to improve the SNR.Secondly,it correlates the auto-correlation and the crosscorrelation to get the time-delay estimation.It has been verified in theory and by experiments that this method can restrain the impac... |
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| Keywords: | generalized cross-correlation the second correlation time-delay estimation |
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