An analytical and closed-form optimal solution expressed in elementary functions for
superdirectivity of a circular sensor array is proposed in this paper. By utilizing the circulant …

This paper addresses the spatial processing of signals collected by a linear array of sensors
that feeds a filter-and-sum, data-independent beamformer. When the frequency band …

Differential beamforming combined with microphone arrays can be used in a wide range of
applications related to acoustic and speech signal acquisition and recovery. A practical and …

Superdirective beamforming has attracted a significant amount of research interest in
speech and audio applications, since it can maximize the directivity factor (DF) given an …

Direction-of-Arrival (DOA) estimation capability of sensor arrays is greatly influenced by
geometric configuration of arrays. We proposed a new type 2-D planar array, improved …

Differential microphone arrays (DMAs) are very attractive because of their high directional
gains and frequency-invariant beampatterns. However, it is generally required that the array …

Coprime arrays represent a form of sparse sensing which can achieve narrow beams using
relatively few elements, exceeding the spatial Nyquist sampling limit. The purpose of this …

Planar arrays are used jointly with filter-and-sum beamforming to achieve 3-D spatial
discrimination in processing broadband signals. In these systems, the beams are steered in …

Among various array configurations, superdirective beamforming based on linear differential
arrays has attracted much attention. It is well known that its directivity performance degrades …

Maximization of the directivity with a constraint on the lower bound of the white noise gain is
a typical strategy used to attain robust performance in superdirective arrays. However, array …