The design of subarrayed phased arrays (PAs) with subarray-only amplitude and phase controls that afford arbitrary-shaped power patterns matching reference ones is addressed. Such a synthesis problem is formulated in ...
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The design of subarrayed phased arrays (PAs) with subarray-only amplitude and phase controls that afford arbitrary-shaped power patterns matching reference ones is addressed. Such a synthesis problem is formulated in the power pattern domain, and an innovative complex-excitations clustering method, which is based on the decomposition of the reference power pattern in a number of elementary patterns equal to the array elements, is presented. A set of representative results is reported to illustrate the features of the proposed approach as well as to assess its effectiveness in comparison with benchmark results from the state-of-the-art (SoA) excitation matching (EM)-based clustering methods.
Both clustering and thinning are effective ways to reduce the implementation complexity of large-size antenna arrays. In this communication, we propose simple but efficient approaches to cluster and thin the antenna a...
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Both clustering and thinning are effective ways to reduce the implementation complexity of large-size antenna arrays. In this communication, we propose simple but efficient approaches to cluster and thin the antenna array for adaptive interference suppression. First, antenna elements are grouped using the $K$ -Medoids algorithm according to the knowledge of the desired-signal steering vector. Based on the clustered result, the minimum-variance distortionless response (MVDR) criterion with reduced dimension is then applied to ensure good adaptive-beamforming performance. To lower the implementation complexity and power consumption further, selected antenna elements are turned off on the basis of the perception from clustering. Simulation results show that under suitable settings, the adaptive interference-suppression capability of the proposed clustered and thinned antenna array can be consistently close to that of the optimal MVDR beamformer, and some reasonable compromises between the performance and both the required hardware and computational complexity are achieved.
Designing a sparse array with reduced transmit/receive modules(TRMs)is vital for some applications where the antenna system’s size,weight,allowed operating space,and cost are *** arrays exhibit distinct architectures...
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Designing a sparse array with reduced transmit/receive modules(TRMs)is vital for some applications where the antenna system’s size,weight,allowed operating space,and cost are *** arrays exhibit distinct architectures,roughly classified into three categories:Thinned arrays,nonuniformly spaced arrays,and clustered *** numerous advanced synthesis methods have been presented for the three types of sparse arrays in recent years,a comprehensive review of the latest development in sparse array synthesis is *** work aims to fill this gap by thoroughly summarizing these *** study includes synthesis examples to facilitate a comparative analysis of different techniques in terms of both accuracy and ***,this review is intended to assist researchers and engineers in related fields,offering a clear understanding of the development and distinctions among sparse array synthesis techniques.
The optimal design of aperiodic/irregular clustered phased arrays (PAs) for base stations (BSs) in multi-user (UE) multiple-input-multiple-output (MU-MIMO) communication systems is addressed. This article proposes an ...
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The optimal design of aperiodic/irregular clustered phased arrays (PAs) for base stations (BSs) in multi-user (UE) multiple-input-multiple-output (MU-MIMO) communication systems is addressed. This article proposes an ad hoc synthesis method aimed at maximizing the UEs traffic capacity within the cell served by the BS while guaranteeing a sufficient level of the signal at the terminals. Toward this end, the search of the optimal aperiodic clustering is carried out through a customized tiling technique able to consider both single and multiple tile shapes and assure the complete coverage of the antenna aperture for the maximization of the directivity. Representative results, from a wide set of numerical examples concerned with realistic antenna models and benchmark Third Generation Partnership Project (3GPP) scenarios, are reported to assess the advantages of the irregular array architectures in comparison with regular/periodic layouts proposed by the standard development organizations as well.
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