On Calibration and Direction Finding with Uniform Circular Arrays
المؤلفون المشاركون
Thomä, Reiner S.
Häfner, Stephan
Käske, Martin
المصدر
International Journal of Antennas and Propagation
العدد
المجلد 2019، العدد 2019 (31 ديسمبر/كانون الأول 2019)، ص ص. 1-12، 12ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2019-07-03
دولة النشر
مصر
عدد الصفحات
12
التخصصات الرئيسية
الملخص EN
Antenna array calibration methods and narrowband direction finding (DF) techniques will be outlined and compared for a uniform circular array.
DF is stated as an inverse problem, which solution requires a parametric model of the array itself.
Because real arrays suffer from mechanical and electrical imperfections, analytic array models are per se not applicable.
Mitigation of such disturbances by a global calibration matrix will be addressed, and methods to estimate this calibration matrix will be recapped from literature.
Also, a novel method will be presented, which circumvents the problem of a changed noise statistic due to calibration.
Furthermore, local calibration, where array calibration measurements are incorporated in the DF algorithm, is considered as well.
Common DF algorithms will be outlined, their assumptions regarding array properties will be addressed, and required preprocessing steps such as the beam-space transformation will be presented.
Also, two novel DF techniques will be proposed, based on the Capon beamformer, but with reduced computational effort and higher resolution for bearing estimation.
Simulations are used to exemplary compare calibration and DF methods in conjunction with each other.
Furthermore, measurements with a single and two coherent sources are considered.
It turns out that global calibration enables computational efficient DF algorithms but causes biased estimates.
Furthermore, resolution of two coherent sources necessitates array calibration.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Häfner, Stephan& Käske, Martin& Thomä, Reiner S.. 2019. On Calibration and Direction Finding with Uniform Circular Arrays. International Journal of Antennas and Propagation،Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1157228
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Häfner, Stephan…[et al.]. On Calibration and Direction Finding with Uniform Circular Arrays. International Journal of Antennas and Propagation No. 2019 (2019), pp.1-12.
https://search.emarefa.net/detail/BIM-1157228
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Häfner, Stephan& Käske, Martin& Thomä, Reiner S.. On Calibration and Direction Finding with Uniform Circular Arrays. International Journal of Antennas and Propagation. 2019. Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1157228
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1157228
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