Abstract: The invention relates to a method for obtaining APRIL-binding peptides. With this method APRIL-binding peptides may be obtained and/or selected. Further aspects of the invention relate to a cell comprising a nucleotide sequence coding for an APRIL-binding peptide according to the invention, a process for producing an APRIL-binding peptide and the APRIL-binding peptide obtainable in the production process and/or the selection method. In view of the possible utility of the APRIL-binding peptides according to the invention, further aspects of the invention relate to diagnostic uses of an APRIL binding peptide of the invention.

Abstract: System (1) for characterizing motion of at least one individual forming a target, comprising a radar emitting electromagnetic signals towards the target and receiving echoed signals, output as radar data, preprocessing means (11) receiving radar data as input and outputting a spectrogram representing time variations of the Doppler spectrum of the radar data, characterizing means (13) configured for outputting a probability density estimation of the state of a target, state means a vector of properties from a target, referred to as state vector, the system being characterized in that said state vector comprises at least one discrete target gait classification variable determining one target gait model among a set of determined target gait models, and a set of discrete and/or continuous motion parameters, the characterizing means comprising estimation means estimating the probability density of said state vector from said spectrogram.

Abstract: System (1) for characterizing motion of at least one individual forming a target, comprising a radar emitting electromagnetic signals towards the target and receiving echoed signals, output as radar data, preprocessing means (11) receiving radar data as input and outputting a spectrogram representing time variations of the Doppler spectrum of the radar data, characterizing means (13) configured for outputting a probability density estimation of the state of a target, state means a vector of properties from a target, referred to as state vector, the system being characterized in that said state vector comprises at least one discrete target gait classification variable determining one target gait model among a set of determined target gait models, and a set of discrete and/or continuous motion parameters, the characterizing means comprising estimation means estimating the probability density of said state vector from said spectrogram.

Abstract: An apparatus for estimating a height at which a target flies over a reflective surface. The apparatus includes means for emitting a signal, and means for receiving signals, including the emitted signal after it has been echoed by the target. The apparatus also includes a height estimator configured to estimate the height by utilizing a direct signal coming directly from the target after the emitted signal has been echoed by the target, an indirect signal coming indirectly from the target after the emitted signal has been echoed by the target and has been reflected by the surface, and reflection parameters including at least one of an amplitude of a reflection coefficient of the surface and a phase difference between the direct signal and the indirect signal. The height estimator comprises a particle filter configured to dynamically estimate the reflection parameters.

Abstract: There is disclosed a method for estimating the height at which a target flies over a reflective surface. The method comprises a step of emitting a signal and a step of receiving signals, including the emitted signal after it has been echoed by the target. The method also comprises a step of filtering the received signals. The method also comprises a step of modeling a direct signal, coming directly from the target after the emitted signal has been echoed by the target, and of modeling an indirect signal, coming indirectly from the target after the emitted signal has been echoed by the target and has been reflected by the surface, based on reflection parameters including the amplitude of the reflection coefficient of the surface and/or the phase difference between the direct signal and the indirect signal. The step of filtering estimates dynamically the reflection parameters by use of a particle filter or a Gaussian-Sum filter.

Abstract: A radar comprising transmitter means for generating bursts of radar pulses, each scan of a radar consisting of a number (Nb) of bursts, the method comprises, for each scan k: a first step, in which a radar cell is pre-selected in a validation gate; a second step, in which a Track-Before-Detect processing is initialized upon the pre-selected cells, using a track filter to construct the validation gate associated to the next scan k+1; the steps being repeated scan to scan. The invention can be applied to surveillance radars, for example with multi-beamforming in elevation, and more generally to all kinds of radars.

Abstract: A radar comprising transmitter means for generating bursts of radar pulses, each scan of a radar consisting of a number (Nb) of bursts, the method comprises, for each scan k: