Beamforming of a distorted line array in the presence of uncertainties on the sensor positions
作者:
Michel Bouvet,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1987)
卷期:
Volume 81,
issue 6
页码: 1833-1840
ISSN:0001-4966
年代: 1987
DOI:10.1121/1.394748
出版商: Acoustical Society of America
关键词: SENSORS;ARRAY PROCESSORS;UNDERWATER;SIMULATION;SIGNAL−TO−NOISE RATIO;NONLINEAR PROBLEMS
数据来源: AIP
摘要:
Array processing based on a linear assumption implies degradations in the source bearing estimation when the array is not linear, which is the usual case in real‐world problems. Assuming only that the array is planar (but not necessarily quasilinear), we describe a method to include in an adaptive way information about the sensor locations into the array processing, in order to take into account its geometrical shape. This information can be the relative positions of the sensors given by a mechanical device included in the array. The relative sensor positions can also be estimated using a source with a known bearing, a cooperative target for example. Simulation results in a real underwater noise sample show that these two cases lead to important improvement with respect to the classical array processing, based on a linear assumption, provided that the signal‐to‐noise ratio of the known source is high enough (around 10 dB in our example).
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