On the tradeoff between resolution and ambiguities for non-uniform linear arrays
Résumé
The performance of most direction of arrival (DoA) estimation algorithms is driven by two different kinds of errors: small, local errors in the main lobe and possibly large errors due to sidelobe peaks ambiguities. Reducing these two kinds of errors simultaneously is not possible and therefore a compromise has to be made. Motivated by automotive applications with small arrays, we consider solving this tradeoff by modifying the positions of the sensors of the array. In this letter, two new criteria are proposed to solve the above mentioned tradeoff. Optimal solutions are derived and illustrations are provided with a 3-element non-uniform linear array.
Mots clés
array signal processing
signal resolution
3-element nonuniform linear array
DoA estimation algorithm
automotive application
direction-of-arrival estimation algorithm
local errors
sidelobe peak ambiguities
Antennas
Direction-of-arrival estimation
Estimation
Geometry
Sensor arrays
Signal to noise ratio
Ambiguities
Non Uniform Linear Array
Radar
Origine : Fichiers produits par l'(les) auteur(s)
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