Abstract: A tunable microwave system includes at least two elements, each element being chosen from a propagating guide, an evanescent guide, a resonator, and at least one coupling device arranged between the two elements and configured to couple the two elements to each other, the coupling device having a holder having an aperture and having at least one elongate element the shape of which is elongate in a polarization direction contained in a plane of the aperture, the elongate element being securely fastened to the perimeter of the aperture at at least one end, the coupling device being configured to be rotatable about an axis substantially perpendicular to the plane of the aperture so as to modify a value of the polarization direction and so that the coupling between the two elements is dependent on the value of the polarization direction.

Abstract: An add-on device configured to reduce the power level of reflected paths of GNSS signals reaching a GNSS receiver's antenna, the associated GNSS receiver set, some equipment embedding the add-on device, and the associated method to reduce the power level of reflected GNSS signals are provided. The GNSS signals are transmitted according to a first polarization, and the add-on device comprises a material configured to be transparent to the first polarization and to reflect GNSS signals polarized according to a second polarization orthogonal to the first polarization.

Abstract: A method for transmitting data packets through a random-access (RA) transmission channel shared by a plurality of user terminals uses and exploits a function F for assigning and distributing transmission resources F(u) to the user terminals, knowledge of the graph of which is shared by the sending user terminals and the receiving station in a preliminary step. During the decoding of the received packets, the graph {(u, F(u)} of the assigning and distributing function is exploited by the receiving station to minimize, or even to decrease to zero, the number of replica-location correlations required in case of failure of the conventional CRD-SA protocol decoding process.

Abstract: This machine includes a tool (30) actuated by an actuating module (32); a dual-frequency satellite positioning module (40) able to take into account corrections relative to the disruptions affecting the propagation of radio navigation signals emitted by each of the visible radio navigation satellites and that are caused by the ionosphere, so as to determine an absolute position of the machine, and consequently of the tool, which is precise to within a centimeter; and a computer (50) able to compare the instantaneous absolute position of the tool and an absolute position of a current revisiting point, selected from among the revisiting points of a revisiting plan, the computer then being able to command the actuation module.

Abstract: A navigation system using Visible Light Communications (VLC), the associated transmitters and receivers, the navigation system comprising a plurality of VLC transmitters (201 to 207) and one or more GNSS receiver (430), each of the VLC transmitters being configured to transmit a positioning signal comprising a navigation message including time information, where the time information is a transmission time of a specific part of said navigation message derived from a GNSS reference time. The receivers (221) according to the invention are configured to calculate a position from either VLC pseudo ranges, GNSS pseudo ranges, or a combination thereof. The associated methods for transmitting positioning signals in a navigation system according to the invention, and for determining a position from a plurality of positioning signals transmitted by said navigation system.

Abstract: A method is provided for estimating the parameters of useful signal and multi-path signals originating from a radiolocation signal emitted by a satellite, a location device comprising at least two sensors able to receive the signal. The method comprises the steps of: correlating the signal received by the sensors with a local code by means of correlators, constructing, for each sensor, a sampled intercorrelation function intercorrelating the signal received with the local code, determining a spatio-temporal intercorrelation function on the basis of the concatenation of the intercorrelation functions obtained in the previous step for each sensor, estimating parameters representative of the useful signal and of the multi-path signals by applying a maximum likelihood algorithm, the representative parameters including at least one complex amplitude estimated independently for each sensor.

Abstract: This solar panel (12) includes a structure (14) and at least two photovoltaic cells (16A, 16B) each defining a lateral contact face (30A, 30B) and including a base element (20A, 20B), a grid of electric conductors (24A, 24B) and a protective element (22A, 22B) made from transparent material, the grid (24A, 24B) including at least one conductive wire extending along the lateral contact face (30A, 30B). The cells (16A, 16B) are arranged on the structure (14) such that at least part of each of the lateral contact faces (30A, 30B) is arranged across from the other part. The solar panel (12) further includes a barrier (18A) made from dielectric material arranged on the structure (14) between the lateral contact faces and extending along the opposite parts of these faces (30A, 30B).

Abstract: A device for handling multipath of a G.N.S.S. signal, is configured to: determine a spatial position, a clock time and measured multipath parameters comprising a relative delay and relative amplitude; communicate to a remote server the spatial position, clock time and multipath parameters; and receive processed multipath parameters as determined by the remote server. Systems comprising a plurality of such devices and their variants are described. Further aspects are described, in particular the exclusion of one or more satellites, the use of threshold schemes, pull/push modes, configurable refresh rates, quantization of positions, activation of additional sensors, filtering options, determination of merit factors for example as a function of the number of satellites in view and/or of signal-to-noise ratio, peer-to-peer schemes, as well as graphical display, audible sound or haptic feedbacks.

Abstract: The invention concerns a method and a device for digital image restoration. The digital image to be restored comes from an initial image acquired by an image acquisition device having an associated acquisition instrumental noise. The method comprises the following steps: —obtaining (30) an intermediate digital image with restoration of the acquisition instrumental noise, —denoising (32) the intermediate digital image in order to obtain a denoised intermediate digital image, —deconvolution (34) of the denoised digital image in order to obtain a restored digital image.

Abstract: A solid-state thermochromic device and method for producing the device, the device including: a stack successively including, from a rear face to a front face exposed to solar radiation: a) a solid substrate of an inorganic material resistant up to a temperature of 550° C.; b) an infrared-reflective layer of an electronically conductive material; c) electronically insulating interface layers; d) an electronically insulating inorganic dielectric layer transparent to infrared radiation, of cerium oxide CeO2, with a thickness between 400 and 900 nm; e) electronically insulating interface layers; f) a layer of an infrared-active thermochromic material, an n-doped VO2 vanadium oxide, and crystallized in a monoclinic or rutile phase, with a thickness between 30 and 50 nm; and g) a solar-protective coating, transparent to infrared radiation.

Abstract: A method of generating frequency combs composed of a predetermined number of rays, wherein the method includes the modulation of a main ray generated by a laser source (20), by a first radiofrequency signal at a first frequency value, by a second radio frequency signal at a second frequency value, and by a third radio frequency signal at a third frequency value. The second frequency value is equal to twice the first frequency value. The third frequency value is equal to three times the first frequency value.

Abstract: The present disclosure concerns a broadband hyperspectral imaging spectrophotometer configured to analyze an object and includes an illumination assembly having a source for emitting a light beam and configured so that the light beam scans line by line the object to be analyzed, a focusing mirror, a first mirror folding, and a planar scanning mirror movable in rotation. The illumination assembly, the focusing mirror, the first folding mirror and the planar mirror are arranged to bring the light beam to the object along a line which will be displaced on the object via the scanning mirror. The imaging spectrophotometer further includes two measuring sensors by a distance between the object and the scanning mirror. The focusing mirror is movable in translation to adapt the imager to the measured distance by the measuring sensors.

Abstract: This solar panel includes a structure in contact with an ambient environment and at least two photovoltaic cells each defining a lateral contact face and including a base element, a grid of electric conductors and a protective element made from transparent material, the grid including at least one conductive wire extending along the lateral contact face. The two cells are arranged on the structure such that at least part of each of the lateral contact faces is arranged regarding the other part while forming a panel surface and such that the shortest path passing through the ambient environment between the opposite parts of the lateral faces of the two cells is equal to at least about 20 mm.

Abstract: An RF joint rotating about an axis of rotation (Z) includes a number N, greater than or equal to 1, of RF transmission channels, a first, internal surface of symmetry of revolution about the axis (Z) and of RF transmission having a first, internal radius r1, and a second, external surface of symmetry of revolution about the axis (Z) and of RF transmission having a second, external radius r2, strictly less than the first, internal radius r1.

Abstract: A new unequal-error-protection method that is based on using a particular parity-check-matrix structure for LDPC codes.

Abstract: The present disclosure relates to a method and a device for measuring at least one atmospheric parameter (gas, temperature). The method includes implementing steps of acquiring spectral images in the ultraviolet and/or the visible and/or the infrared range and scanning according to a tomographic principle. The spectral images are acquired using a network of optical systems such as infrared cameras, and are used to estimate the air quality and/or meteorological and/or climate parameters in a geographic area, for example an urban agglomeration.

Abstract: Method for processing a sequence of digital signal samples comprising a first sub-sequence and a second sub-sequence, said method comprising: forming (106) a first block of samples comprising the first sub-sequence and a second block of samples comprising header samples followed by the second sub-sequence; demodulating (108) the first block of samples through a digital demodulator to produce a first block of symbols, and the second block of digital signal samples through a second digital demodulator to produce a second block of symbols, the second demodulator implementing a carrier synchronisation or symbol rate synchronisation starting with the header samples (E6-E9), which comprise samples in a number adapted in such a way that the synchronisation is effective before the second demodulator demodulates the second sub-sequence; and reconstructing (114) a sequence of symbols by concatenating the first symbol block with the second symbol block.

Abstract: This microwave component (10) comprises a waveguide (12) comprising an upper layer, a lower layer, and a central layer (18) intermediate between the upper layer and the lower layer, said layers defining a zone (19) of propagation of an electromagnetic wave, the propagation zone (19) extending along a propagation axis, and comprising a cavity (32) bounded by the upper layer, the lower layer, and, laterally, by two opposite lateral edges (36) of the central layer (18). The waveguide (12) comprises at least one dielectric strip (28) placed in the propagation zone (19), the dielectric strip (28) being defined in one of the upper layer and the lower layer or being placed in the cavity (32) away from the lateral edges (36) of the cavity (32).

Abstract: A microwave component (10) of the type substrate integrated transmission line, comprises at least one upper layer (14) having at least one electrically conductive surface (26), a lower layer (16) having at least one electrically conductive surface (44), and a central layer (18) defining a propagation area (20) of an electromagnetic wave extending along a propagation axis. The upper layer (14) comprises at least an upper hole (30) passing through it; the lower layer (16) comprises at least one lower hole (46) passing through it. An electrically conductive wire (22) is received through the upper hole (30), the propagation area (20) and the lower hole (46), the conductive wire (22) being electrically connected to the electrically conductive surface (26) of the upper layer (14) and the electrically conductive surface (44) of the lower layer (16).

Abstract: The invention discloses a positioning device configured to acquire its own GNSS position, the GNSS positions of rovers in an area around the positioning device and the relative positions of the positioning device to the rovers. The positioning device is configured to calculate a best-fit position based on this data and their confidence indexes. The positioning devices may communicate directly or through a navigation assistance centre. The best-fit position may be provided with indexes of confidence, availability and integrity. In some embodiments, the positioning device of the invention may be robust enough to generate commands to the driving controls of an autonomous vehicle.