Results 71 to 80 of about 2,822,972 (301)
Joint Waveform and Beamforming Optimization for MIMO Wireless Power Transfer [PDF]
, 2020 In this paper, we study a multi-sine multiple-input multiple-output (MIMO) wireless power transfer (WPT) system with the objective to increase the output DC power. We jointly optimize the multi-sine waveform and beamforming accounting for the rectenna nonlinearity, and consider two combining schemes for the rectennas at the receiver, namely DC and RF ...
arxiv +1 more source
Laser &Photonics Reviews, EarlyView.Fully exploiting the broad untapped terahertz spectrum necessitates extending the bandwidth of practical guided‐wave systems. This work introduces a substrateless quasi‐optical integration platform to meet this need. Classical optical principles going back to the time of Michelson are adapted to a planar, micro‐machined, monolithic‐silicon platform ...
Daniel Headland +4 more
wiley +1 more source
Beamforming with 1 × N Conformal Arrays
Sensors, 2022 The rapid growth of wireless spectrum access through cellular and IoT devices, for example, requires antennas with more capabilities such as being conformal and self-adapting beamforming.
Irfan Ullah +4 more
doaj +1 more source
Channel Estimation and Hybrid Precoding for Millimeter Wave Cellular Systems
, 2014 Millimeter wave (mmWave) cellular systems will enable gigabit-per-second data rates thanks to the large bandwidth available at mmWave frequencies. To realize sufficient link margin, mmWave systems will employ directional beamforming with large antenna ...
Alkhateeb, Ahmed +3 more
core +1 more source
Adaptive Beamforming for Wireless Communications [PDF]
, 1996 The increasing demand for mobile and cellular services has resulted in the near-depletion of allocated frequency resources, especially in urban areas. In order to absorb more and more customers in a wireless communication system, we face the challenge of improving the system capacity without degradation in the quality of services.
K. Cho, A. Sandhu, John Litva, T. Lo
openaire +2 more sources
Beamforming Techniques for Multichannel audio Signal Separation
, 2012 Beamforming is a signal processing technique. It has been studied in many areas such as radar, sonar, seismology and wireless communications, to name but a few.
Adel, Hidri +3 more
core +1 more source
ADAPTIVE BEAMFORMING FOR ACOUSTIC COMMUNICATIONS
Le Journal de Physique Colloques, 1990 The basic factors which need to be considered in the design of a practical through water communications system utilising an adaptive beamformer at the receiver are examined. Simulation results demonstrate the feasibility of using such a scheme. It is clear that the multipath phenomenon which has proved so detrimental to a high data rate through water ...
G.S. Howe +3 more
openaire +3 more sources
5G new radio multiuser precoding in geostationary satellite networks
International Journal of Satellite Communications and Networking, EarlyView.This work evaluates the standardized 5G new radio codebooks for closed‐loop multiuser precoding in GEO multibeam scenarios and derives a list of recommended 3GPP standard modifications for a proper support to GEO mission needs. Summary The multiuser precoding procedures standardized by the 3rd Generation Partnership Project (3GPP) for new radio (NR ...
Xavier Artiga, Miguel Ángel Vázquez
wiley +1 more source
Controllable Sparse Antenna Array for Adaptive Beamforming
IEEE Access, 2019 We propose an $l_{0}$ -norm constrained normalized least-mean-square (CNLMS) adaptive beamforming algorithm for controllable sparse antenna arrays. To control the sparsity of the antenna array, an $l_{0}$ -norm penalty is used as a constraint in the ...
Wanlu Shi +3 more
semanticscholar +1 more source
Engineering Science and Technology, an International Journal, 2021 Ultrasound imaging is a largely used medical imaging system as it is safe, non-invasive, and capable of real-time imaging. In ultrasound imaging, different beamforming methods are used to obtain the image of the field of view.
Mayur Agarwal +2 more
doaj