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首页> 外文会议>2014 IEEE Central America and Panama Convention >Shooter localization using microphone arrays on elevated platforms
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Shooter localization using microphone arrays on elevated platforms

机译：在高架平台上使用麦克风阵列对射击者进行定位

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摘要

This paper discusses a technique to estimate the position of a sniper using spatial array located on a raised platforms. Shooter location is estimated from topographic information of the area and the direction of arrival (DoA) of the gunshot signal; in particular, its component produced by the explosion in the barrel of the gun, known as muzzle blast. The direction of arrival is based on the time differences at which the sound wavefront arrives at each microphone; these differences are estimated from the Generalized Cross Correlation (GCC) using phase transform. The terrain profile is drawn using the contour lines of a digital map. The DoA estimation and the terrain profile allowed assessing the position of the sniper. In addition, a new approach to improve the estimation of the DoA from a cognitive selection of microphones is presented. In this proposed technique, the microphones selected must form a consistent key loop (sum of delays equal to zero). The results obtained after processing signals recorded in a real situation show the effectiveness of the proposed method.
机译：本文讨论了一种使用位于凸起平台上的空间阵列来估计狙击手位置的技术。根据该区域的地形信息和枪响信号的到达方向（DoA）估算射击者位置；特别是其成分是由枪管内的爆炸（称为枪口爆炸）产生的。到达的方向基于声波前到达每个麦克风的时间差。这些差异是使用相位变换根据广义互相关（GCC）估算的。使用数字地图的轮廓线绘制地形轮廓。通过DoA估计和地形轮廓可以评估狙击手的位置。此外，提出了一种新方法，可以从麦克风的认知选择中改善DoA的估计。在此提议的技术中，所选的麦克风必须形成一致的按键环（延迟总和等于零）。处理真实情况下记录的信号后获得的结果表明了该方法的有效性。

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