Beamforming
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Recent papers in Beamforming
The noise produced by complex systems such as automobiles, airplanes, machines, etc. contributes to overall noise of an environment. In the way to reduce these levels, the identification of the prominent sources is necessary. In many... more
The millimeter wave (mmWave) frequency band is seen as a key enabler of multi-gigabit wireless access in future cellular networks. In order to overcome the propagation challenges, mmWave systems use a large number of antenna elements both... more
Viscoelastic material is commonly used in the passive treatment of structural vibration of the vehicle structure, to introduce damping and reduce vibration level at resonance frequencies. In a passenger vehicle chassis it is usual to add... more
Resumen – En el presente trabajo se expone el diseño de un arreglo lineal de parlantes con control de directividad utilizando procesamiento digital. Se desarrollaron los conceptos teóricos pertinentes al problema y se diseñó y planteó un... more
Nel presente lavoro sono analizzati alcuni risultati sperimentali di una misura del coefficiente di assorbimento acustico, a inci-denza quasi normale, effettuata sulla superficie assorbente di una barriera antirumore utilizzando... more
Beam forming is the process of combining the weighted signals received on an array of sensors to improve the directionality. Adaptive beamforming is the ability of the beamformer to receive the signal only from the desired direction and... more
Physical layer protection, which protects data confidentiality using information-theoretic methods, has recently attracted a lot of research attention. Using the inherent randomness of the transmission channel to ensure protection in the... more
This paper deals with the study of various types of Beamforming algorithms. A beam former is a processor used in conjunction with an array of sensors to provide a versatile form of spatial filtering. The sensor array collects spatial... more
This paper describes recent work on the topic of multi-dimensional (MD) spatio-temporal noise and distortion shaping for radio-frequency (RF) antenna arrays with applications in wireless communications, phased-array radar sensing,... more
Hybrid cars have become more important due to increasing fuel costs and the goal of reducing CO2 emissions. In this talk, the noise producing mechanisms of a Honda Civic Hybrid will be studied using a phased array and a range of... more
The next generation of wireless local area networks (WLANs), currently standardized within IEEE S02.11ac, will surely adopt multiuser multiple-input multiple-output (MU MIMO) technology. This paper addresses... more
The physical mechanisms behind the formation of shaped-beam radiation patterns by open ended waveguide feeds with finite-size corrugated flanges are studied in a rigorous manner using the singular integral equation (SIE) approach.
Listening tests are essential for optimising and evaluating novel signal processing concepts for hearing devices. When they are performed inside the laboratory they are highly controlled, but typically lack ecological validity. On the... more
In this study, we propose an implementation of the cross-pattern coherence (CroPaC) spatial- filtering technique. This parametric algorithm utilizes the normalized cross-spectral density be- tween signals from microphones of different... more
Classical Beamforming is a signal processing technique capable of creating acoustic images. The algorithm utilized is the simple delay-and-sum over the sampled sound waves in the time domain. One important tool in the application of the... more
► A kind of Elastic Composite, Reinforced Lightweight Concrete (ECRL.C) with the mentioned specifics is a type of "Resilient Composite Systems (RCS)" in which, contrary to the basic geometrical assumption of the flexure theory in Solid... more
This paper concerns the eavesdropping attacks in wireless ad hoc networks under a shadow fading environment. Most of previous studies have only concentrated on protecting the confidential communications at both the transmitters and the... more
Compared with omni-directional antennas, directional antennas have many merits, such as lower interference, better spatial reuse, longer transmission range and the improved network capacity. Directional antennas enable numerous emerging... more
This paper presents an experimental investigation of the flow-induced noise created by a wall-mounted finite airfoil at low-to-moderate Reynolds number and zero angle of attack. Far-field noise measurements have been taken at a single... more
This paper describes preliminary research results on enhancement of loudspeaker impulse response measurement in small room. Proposed enhancement is a combination of MLS (Maximum Length Sequence) algorithm and Delay-Sum Beamforming in... more