This article proposes using in-phase and quadrature frequency-shift keying (IQFSK) modulation for low-power optical wireless communications (OWC). IQFSK independently leverages both cosine and sine basis functions to enhance the system’s spectral efficiency (SE). It uses only the odd harmonic frequencies for these basis functions, allowing the clip...
Currently, screen content video applications are increasingly widespread in our daily lives. The latest Screen Content Coding (SCC) standard, known as Versatile Video Coding (VVC) SCC, employs screen content Coding Modes (CMs) selection. While VVC SCC achieves high coding efficiency, its coding complexity poses a significant obstacle to the further...
This paper derives lower bounds for the mean square errors of parameter estimators in the case of Poisson distributed data subjected to multiple abrupt changes. Since both change locations (discrete parameters) and parameters of the Poisson distribution (continuous parameters) are unknown, it is appropriate to consider a mixed Cramer-Rao/Weiss-Wein...
The purpose of this paper is to propose a compact model to represent the magnetic field outside the sources. This model provides the multipolar ordering of a spherical harmonic expansion far from the source, while being valid in its close proximity. We investigate equivalent surface sources that enable to compute the field very close to any chosen ...
Autonomous space rendezvous (RDV) is gaining increasing significance in tandem with the advancement of onorbit services and operations, such as refueling, debris removal, in-orbit assembly, and transportation. Several of these applications require the ability to navigate around non-prepared clients, where specific navigation aids are unavailable. I...
Published in Frontiers in Physics
We analyze the results of the test of π/2 qubit rotations on a public quantum computer provided by IBM. We measure a single qubit rotated by π/2 about a random axis, and we accumulate vast statistics of the results. The test performed on different devices shows systematic deviations from the theoretical predictions, which appear at level 10–3. Some...
This paper proposes a novel approach to 3-D microwave imaging using dynamic metasurface antennas in a multistatic configuration. By introducing a panel-to-panel model and a preprocessing technique, raw measurements are converted into the space-frequency domain for efficient data acquisition and reconstruction. Adapting the range migration algorithm...
Single-pixel imaging is able to acquire an image from a few point measurements thanks to dedicated reconstruction algorithms. In recent years, reconstruction approaches based on deep learning have outperformed most alternatives. However, computational experiments and data-driven methods have become difficult, if not impossible, to reproduce. The de...
Near-field source localization often requires a 2D search, a uniform inter-element spacing and/or, more severely, a reduced array aperture.Thanks to a Taylor expansion that is valid beyond the Fresnel zone,the 2D (source angle and range) optimization is converted into thatof a 1D spectrum, function of the only angle of arrival, i.e. as simply (comp...
The POSEIDON project aims at defining solutions for scalable CF-mMIMO operating in the sub-6GHz frequencybands where the available spectral resources are scarce. In particular, scalable CF-mMIMO architectures must beable to handle i) to support the dramatic increase in wireless traffic demand, which is caused by the exponentialgrowth of connected w...
