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Virtual antenna array (VAA) formed by unmanned aerial vehicle (UAV) antenna units using collaborative beamforming (CB) technology plays an important role in the air communication system, and can be used in radar, military, disaster rescue and other places. However, there are still some issues with the beam pattern formed by this method, such as high sidelobe level (SLL), high cost and low efficiency...
Antenna array makes an increasingly valuable contribution to various fields of communications. The beam pattern synthesis is one of the significant properties of antenna array. In this article, suppressing the maximum sidelobe levels (SLLs) of different antenna arrays is our main objective. Specifically, we first formulate the beam pattern optimization problems of the linear antenna array (LAA) and...
This study deals with a design problem of linear and circular antenna arrays (LAAs and CAAs, respectively) for suppressing the sidelobe levels (SLLs). By adding a new local search strategy and a selection operator into the normal biogeography-based optimization, this work develops a biogeography-based optimization based on local search (BBOLS) algorithm to determine an optimal set of excitation current...
Collaborative beamforming has been introduced in the communication process of wireless sensor networks to increase the transmission range of sensor nodes. The challenge in using collaborative beamforming is the high sidelobe level. In this paper, an improved hybrid heuristic swarm intelligence optimization algorithm called bat-chicken swarm optimization is proposed to optimize the peak sidelobe level...
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