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http://dx.doi.org/10.7776/ASK.2021.40.4.391

Performance analysis of sensor selection methods for beam steering direction of non-linear conformal array  

Kwon, Taek-ik (Agency for Defense Development)
Publication Information
The Journal of the Acoustical Society of Korea / v.40, no.4, 2021 , pp. 391-399 More about this Journal
Abstract
The conformal array sensor has different sub-array depending on different beam steering directions. According to the method to effective the sensor, the performance of the conformal array sensor can be different, where the sub-array selects an effective sensor. Also, due to the figure of the conformal array sensor, the figure of the sub-array can be different each other, which results in different performance on directivity index, beam width and etc. In this paper, two methods to select sub-array which is the criteria for each sensors position vector and directive vector were proposed. For two sub-array selection methods, the performance of the directivity index, horizontal and vertical beam width were compared with the average and variance. In addition, this comparison was conducted when the number of sensors was fixed. When the number of sensors was not fixed, the directional vector method mainly results in high performance, but the performance of vertical beam width was lower or equal. When the number of sensors was fixed, the performance of two methods is similar, but the performance of variance was deteriorated.
Keywords
Conformal array sonar; Beam pattern; 3 dB Beam width; Directivity Index (DI); Non-linear beamforming;
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