MUSICS News
This page lists MUSICS related events communicated by our scientific board.( current | all | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006)
23rd IEEE Symposium on Communications and Vehicular Technology (IEEE SCVT)
22 Nov. 2016(more information)
23rd IEEE Symposium on Communications and Vehicular Technology (IEEE SCVT). The Symposium is aimed at presenting and discussing the latest scientific and technical advances in communication systems and vehicular communication technology
Meeting FNRS Contact Group
16 Nov. 2016(more information)
Next Meeting FNRS Contact Group "Wavelets and applications" will take place in Louvain-la-Neuve, on Wednesday November 16th.
Non-uniform Grid Based Acceleration of Iterative and Direct Integral Equation Solvers
24 Oct. 2016(more information)
In this presentation we describe the Non-uniform Grid (NG) approach and demonstrate that it can be employed to accelerate both iterative and direct integral equation-based solvers. The NG approach stems from the observation that, locally, phase and amplitude compensated field radiated by a finite size source is an essentially bandlimited function of the angular and radial coordinates of the source centered spherical coordinate system. Therefore, the radiated field can be sampled on a non-uniform spatial grid (NG) and subsequently evaluated at any point by phase and amplitude compensated interpolation. Using such NG field representation and conventional hierarchical domain decomposition, the multilevel non-uniform grid (MLNG) algorithm reduces the complexity of field evaluation from O(N2) to O(NlogN) (N being the number of unknowns), thus facilitating fast iterative solution of electromagnetic and acoustic problems. Furthermore, we developed a direct solver using NG-based matrix compression for scattering from quasi-planar objects. In this context, we show that approximately O(N1.5) complexity is attained for the matrix compression, and the computational cost of the solution for each right-hand-side is approximately of O(N)
Opportunistic radar imaging using a multichannel receiver
25 May. 2016(more information)
A Synthetic Aperture Radar (SAR) is a sidelooking radar system used to produce a radar image of the observed area. The transmitter and the receiver may be separated, in which case the configuration is called bistatic. In this work, the emissions of existing SAR satellites are exploited by a stationary receiver-only system deployed in the field to produce a local radar image in (near) real-time. In addition to the advantages of reduced procurement and maintenance costs, the receiving system can sense passively while remaining covert yielding increased survivability and robustness against jamming. Applications of such a system include small-scale all-weather area surveillance, change detection,... Modern SAR systems usually operate in complex scanning modes that illuminate a wide area and result in a low cross-range resolution. In this thesis, a novel SAR image synthesis method is proposed to exploit those complex radar modes in a bistatic configuration to produce radar images with a 5-fold increase in cross-range resolution. Signals from any radar satellite in the receiving band of the passive receiver can be used, thus increasing the refresh rate of high cross-range resolution images over the area of interest. The proposed method is demonstrated using real measurements from C-band satellites such as RADARSAT-2 and European Space Agency's satellites ERS-2, ENVISAT, Sentinel-1A and Sentinel-1B. In addition, this thesis analyses the main technological issues in bistatic SAR such as the azimuth-variant characteristic of bistatic data and the effect of imperfect synchronisation between the non-cooperative transmitter and the developed receiver. The military deployment of such a radar would offer a number of operational advantages, such as invisibility to the enemy and better timeliness than would be the case of images obtained via the spaceborne SAR system.
UCL Interplatform Workshop on Nanotechnology: From Materials to Devices
29 Jan. 2016(more information)
During this scientific event, organized by the Winfab (Micro and nano-fabrication), Welcome (electrical characterization), Mica (SEM, TEM and SPM microscopies), Such (surfaces analysis) and CTMA (applied molecular technologies) technological platforms of the Université catholique de Louvain, you will have the opportunity to attend several presentations focused on: - Technological capabilities of the five organizing platforms - Collaborative research projects associated with these platforms - Presentation of advanced scanning probe techniques (by Bruker)