A Study of the Partially Adaptive Concentric Ring Array

Abstract

Concentric ring arrays can provide effective beamforming and achieve frequency invariant beampatterns. For long range signal acquisition, the array has a large number of array elements, and partial adaptation is often necessary to increase tracking ability and reduce computation. The topic of this paper is the study of a partially adaptive concentric ring array for three-dimensional audio signal acquisition. We develop the partially adaptive array through partition matrix formulation, provide the associated adaptive structure, and derive the steady state residual interference and noise power that can serve as a criterion to evaluate different partition structures. A comparison of several partition schemes using the criterion is given, and the theoretical results are supported by simulations.

Performance analysis of narrowband beamforming using fully and partial adaptive beamformers with a spherical array

“…Partial adaptation reduces the computational complexity of processing a large number of elements present in the fully adaptive beamformers (FABs). Li et al (2008) suggested an element space partially adaptive array in which each sub-array uses the delay-and-sum (DAS) weights (Saff and Kuijlaars 1997). The convergence speed is enhanced in comparison to fully adaptive array and noise power is increased mildly (Ilyas et al 2008;Cioffi and Kailath 1984;Dhiman et al 2013).…”

Simplified Rectangular Planar Array With Circular Boundary for Side Lobe Suppression

“…The excitations of the elements of the non-optimized subarray are kept unchanged from their original excitations. In [19][20][21][22][23], various analytical and numerical techniques for array pattern optimization have been suggested, and they are basically based on partially adaptive arrays to simplify the array complexity. In [24], a small number of edge elements on both sides of a linear array are optimized to meet the required radiation patterns with controlled nulls.…”