DOA Estimation of Muzzle Blast for an Embedded Microphone Array Using Low-rank and Geometric Constraints

doi:10.3969/j.issn.1000-1093.2019.03.014

Abstract

Abstract: An estimation method for direction of arrival (DOA) of muzzle blast is proposed to solve the shell-induced deviation problem in target orientation estimation of a partially shaded microphone array embedded in a small-aperture gunshot detection system. The adverse effect of non-line-of-sight (NLOS) propagation on the time difference of arrival (TDOA) is analyzed, and a convex optimization algorithm with low-rank and geometric constraints is devised to correct TDOA matrix for simultaneously suppressing the influence from both diffraction propagation and random noise. The non-shaded microphone closest to the target is chosen as the reference microphone. The statistical mean and variance values of least squares DOA estimation error are obviously decreased. The experimental results obtained using a real embedded planar array system demonstrate that the proposed method provides superior muzzle blast DOA estimation performance compared with the conventional approach, by which the cumulative probability of estimation error meeting the requirement of practical products is improved from 0.86 to 0.94. Key

Key words: microphonearray, directionofarrivalestimation, gunshotdetection, diffractioneffect, errorcorrection

CLC Number:

O429
TJ012.2

WANG Xu， ZHAO Zhao， XU Zhiyong. DOA Estimation of Muzzle Blast for an Embedded Microphone Array Using Low-rank and Geometric Constraints[J]. Acta Armamentarii, 2019, 40(3): 555-560.

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第40卷
第3期2019 年3月兵工学报ACTA
ARMAMENTARIIVol.40No.3Mar.2019

[1]	HUANG Huixiang， GUO Qiuhan， TONG Feng. Microphone Array Sound Source Direction-of-arrival Estimation Based on Distributed Compressed Sensing [J]. Acta Armamentarii, 2019, 40(8): 1725-1731.
[2]	GAO Xiaofeng, LI Ping, LI Guolin, HAO Xinhong, JIA Ruili. Two-dimensional Direction-of-arrival Estimation for L-shaped Nested Array Based on Cross-covariance Matrix [J]. Acta Armamentarii, 2019, 40(6): 1207-1215.
[3]	ZHANG Shaojun, XUE Xiangyao, GAO Yunguo, WANG Guang. Correction of Static Pointing Error of a Novel Optical Testing Target [J]. Acta Armamentarii, 2019, 40(5): 1030-1037.
[4]	XIE Meng-rui， ZHAO Zhao， LI Yang， XU Zhi-yong. Muzzle Blast Recognition Based on Multi-scale Subband Energy Set [J]. Acta Armamentarii, 2018, 39(10): 1951-1957.