Concept

Beamforming

Publications associées (104)

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Design rules for efficient compact W-BAN antennas

Anja Skrivervik

Antennas are an important element of Wireless Body Area Network equipments, as the quality of the antenna and its coupling to the channel will be a key component of the quality of the overall link. Indeed, the antenna and its interaction with the body of t ...

IEEE2014

On the selection of radiating elements for compact indoor massive-MIMO base stations

Julien Perruisseau-Carrier

Massive-multiple input multiple output (MIMO) was recently proposed as a key solution for improving the performance of multi-user MIMO in future cellular generations. The main paradigm in this novel MIMO technique is to use a very large number of antenna e ...

Institution of Engineering and Technology2014

On the selection of radiating elements for compact indoor massive-multiple input multiple output base stations

Julien Perruisseau-Carrier

Inst Engineering Technology-Iet2014

Integrated VCSEL-Microlens Scanner With Large Scan Range

Niels Quack

We present an integrated beam steering system with a microlens scanner and a vertical cavity surface-emitting laser (VCSEL) source. The scanner and the VCSEL are assembled with an alignment sphere process and with an accuracy of 121 ±7 μm defined by precis ...

2014

Array-Fed Partially Reflective Surface Antenna With Independent Scanning and Beamwidth Dynamic Control

Julien Perruisseau-Carrier, Tomislav Debogovic

In this communication we present a concept of a partially reflective surface (PRS) antenna capable of independent beam-scanning and beamwidth dynamic control. The beamwidth is controlled by reconfiguring the PRS reflectivity via embedded varactor diodes, w ...

Institute of Electrical and Electronics Engineers2014

A Multipath Sparse Beamfroming Method

Hervé Bourlard, Volkan Cevher, Afsaneh Asaei

A novel formulation of beamforming is proposed for acquisition of the signals in reverberant acoustic clutter of interferences and noise. We derive the beamforming methods which incorporate the sparsity structure pertained to the acoustic source distributi ...

2013

User Effects in Beam-Space MIMO

Julien Perruisseau-Carrier, Mohsen Yousefbeiki, Halima Najibi

The performance and design of the novel single-RF-chain beam-space MIMO antenna concept is evaluated for the first time in the presence of the user. First, the variations of different performance parameters are evaluated when placing a beam-space MIMO ante ...

Institute of Electrical and Electronics Engineers2013

Synthesis of uniform amplitude focused beam arrays

Juan Ramon Mosig, Anja Skrivervik, Benjamin Fuchs

An iterative algorithm to synthesize uniform amplitude focused beam arrays is presented. While the number of array elements and the excitations are fixed and known, the locations of the elements are optimized to radiate a narrow beam low sidelobe pattern. ...

IEEE2013

Hierarchical Beamforming for Large One-Dimensional Wireless Networks

Olivier Lévêque, Alla Merzakreeva

We consider a wireless network with a large number of source-destination pairs distributed over a line. Under line-of-sight propagation, this network has only one degree of freedom for communication. At high SNR, this one degree of freedom can be readily a ...

Ieee2012

Beam coordination via diffusion adaptation over array networks

Ali H. Sayed

In this work, we consider a distributed beam coordination problem, where a collection of arrays are interconnected by a certain topology. The beamformers employ an adaptive diffusion strategy to compute the beamforming weight vectors by relying solely on c ...

IEEE2012