Patents by Inventor Luc Dartois
Luc Dartois has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11706765Abstract: A method, in abase station of a wireless telecommunications system comprising multiple radiating elements, the method comprising modifying a number of uplink or downlink information streams, each information stream corresponding to an element in a space sampling basis for the system, wherein, in the downlink, the space sampling basis is configured so that the number of information streams is the same as the number of radiating elements of the system, and in the uplink, the space sampling basis is configured using a composite antenna derived from multiple radiating elements of the system to form a synthesised beam.Type: GrantFiled: October 20, 2017Date of Patent: July 18, 2023Assignee: NOKIA TECHNOLOGIES OYInventors: Luc Dartois, Denis Rouffet
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Patent number: 11139866Abstract: According to an aspect, there is provided an apparatus comprising a combiner for combining a received analog signal with an analog dithering signal to produce a combined analog signal, a one-bit analog-to-digital converter for converting the combined analog signal to a combined digital signal, means for performing joint downsampling and feature extraction for the combined digital signal, means for implementing a trained machine-learning algorithm for calculating one or more input parameters for waveform generation at least based on one or more features extracted from the combined digital signal and a parametric waveform generator for generating the analog dithering signal based on the one or more input parameters.Type: GrantFiled: December 28, 2020Date of Patent: October 5, 2021Assignee: NOKIA TECHNOLOGIES OYInventors: Faycal Ait Aoudia, Jakob Hoydis, Paul Tourniaire, Luc Dartois
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Publication number: 20210211163Abstract: According to an aspect, there is provided an apparatus comprising a combiner for combining a received analog signal with an analog dithering signal to produce a combined analog signal, a one-bit analog-to-digital converter for converting the combined analog signal to a combined digital signal, means for performing joint downsampling and feature extraction for the combined digital signal, means for implementing a trained machine-learning algorithm for calculating one or more input parameters for waveform generation at least based on one or more features extracted from the combined digital signal and a parametric waveform generator for generating the analog dithering signal based on the one or more input parameters.Type: ApplicationFiled: December 28, 2020Publication date: July 8, 2021Inventors: Faycal AIT AOUDIA, Jakob HOYDIS, Paul TOURNIAIRE, Luc DARTOIS
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Publication number: 20200344746Abstract: A method, in abase station of a wireless telecommunications system comprising multiple radiating elements, the method comprising modifying a number of uplink or downlink information streams, each information stream corresponding to an element in a space sampling basis for the system, wherein, in the downlink, the space sampling basis is configured so that the number of information streams is the same as the number of radiating elements of the system, and in the uplink, the space sampling basis is configured using a composite antenna derived 205f from multiple radiating elements of the system to form a synthesised beam.Type: ApplicationFiled: October 20, 2017Publication date: October 29, 2020Inventors: Luc Dartois, Denis Rouffet
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Patent number: 10038455Abstract: A signal modulation device comprising: an input for receiving a complex input signal (106) comprising an in-phase component signal and a quadrature-phase component signal, a sigma-delta modulator (110) for modulating the complex input signal at an oversampling clock rate (F1) into an intermediary signal (112), a numerical oscillator (60) for generating a phase signal (61) oscillating at a selected carrier frequency (FC), wherein the phase signal takes a finite number of quantized states, and a symbol mapping table (114) comprising a predefined quantized symbol for each quantized complex state of the intermediary signal and each quantized state of the phase signal, and operates at each oversampling clock period (F1) to select a quantized symbol (116) as a function of a current quantized complex state of the intermediary signal (112) and a current quantized state of the phase signal (61).Type: GrantFiled: May 5, 2014Date of Patent: July 31, 2018Assignee: Alcatel LucentInventor: Luc Dartois
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Publication number: 20170317686Abstract: A signal modulation device comprising: an input for receiving a complex input signal (106) comprising an in-phase component signal and a quadrature-phase component signal, a sigma-delta modulator (110) for modulating the complex input signal at an oversampling clock rate (F1) into an intermediary signal (112), a numerical oscillator (60) for generating a phase signal (61) oscillating at a selected carrier frequency (FC), wherein the phase signal takes a finite number of quantized states, and a symbol mapping table (114) comprising a predefined quantized symbol for each quantized complex state of the intermediary signal and each quantized state of the phase signal, and operates at each oversampling clock period (F1) to select a quantized symbol (116) as a function of a current quantized complex state of the intermediary signal (112) and a current quantized state of the phase signal (61).Type: ApplicationFiled: May 5, 2014Publication date: November 2, 2017Applicant: Alcatel LucentInventor: Luc Dartois
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Patent number: 9083398Abstract: The invention relates to a base transceiver station (BTS) for communicating with a plurality of user equipments (UE1, UE2, UE3, UE4, UE5) divided in at least two groups, said base station comprises: an antenna element arrangement generating at least two shifted static beams (Bi, Bo) with respective down tilts for reaching the user equipments (UE1, UE2, UE3, UE4, UE5) a processing unit (25) connected to said transceiver chains (9) and having means for performing at least two linear complex combinations of up-link digital signals—means for receiving said up-link signals and for selecting per user equipment the appropriate beam based on the quality of said up-link signals in the beam flows (Fi,FO).Type: GrantFiled: May 28, 2010Date of Patent: July 14, 2015Assignee: Alcatel LucentInventors: Luc Dartois, Samuel Betrencourt
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Publication number: 20130102302Abstract: The present invention refers to a method for managing power levels in the uplink communications of user equipments attached to the base station of a network small cell wherein the contribution of neighbouring cells user equipments in the interference level produced at said base station is taken into account in the determination of the attached user equipment power levels.Type: ApplicationFiled: December 15, 2010Publication date: April 25, 2013Inventors: Samuel Betrencourt, Luc Dartois
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Publication number: 20120264469Abstract: The invention relates to a base transceiver station (BTS) for communicating with a plurality of user equipments (UE1, UE2, UE3, UE4, UE5) divided in at least two groups, said base station comprises: an antenna element arrangement generating at least two shifted static beams (Bi, Bo) with respective down tilts for reaching the user equipments (UE1, UE2, UE3, UE4, UE5) a processing unit (25) connected to said transceiver chains (9) and having means for performing at least two linear complex combinations of up-link digital signals—means for receiving said up-link signals and for selecting per user equipment the appropriate beam based on the quality of said up-link signals in the beam flows (Fi,FO).Type: ApplicationFiled: May 28, 2010Publication date: October 18, 2012Inventors: Luc Dartois, Samuel Betrencourt
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Patent number: 7466966Abstract: A method for clipping a wideband signal in order to eliminate signal overshots having an amplitude above a predefined threshold before submitting the wideband signal to a power amplifier. The method subtracts, from the wideband signal, filtered pulses in phase with the wideband signal, each filtered pulse corresponding to an overshot, and the amplitude of each filtered pulse being dependant on the amplitude of the corresponding overshot and on the predefined threshold. The subtraction step is repeated at least twice on the wideband signal.Type: GrantFiled: October 5, 2001Date of Patent: December 16, 2008Assignee: AlcatelInventor: Luc Dartois
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Patent number: 7336724Abstract: The invention relates notably to a method for scaling peak power amplitudes in a signal at a transmitter before submitting said signal to a power amplifier. According to the invention, the method consists in: calculating scaling factors for a pulse train comprising a group of at least two adjacent peaks which power exceed a predefined threshold (TCLIP), said scaling factor for one peak taking into account an influence on said peak which occurs if at least one other peak of said group is applied a scaling factor; applying said calculated scaling factors to said respective peaks of said group.Type: GrantFiled: July 21, 2003Date of Patent: February 26, 2008Assignee: AlcatelInventors: Peter Jaenecke, Jens Strauss, Luc Dartois
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Patent number: 7292836Abstract: The invention relates to a direct conversion receiver for down-converting a received multi-carrier signal comprising at least a first and a second carrier signal at image carrier frequencies to a base band resulting in that the first carrier signal includes an image signal of said second carrier signal. Further, the known direct conversion receiver comprises at least a first and a second digital down-converter unit for separating the first and the second carrier signal from the down-converted multi-carrier signal after digitization. In order to make such receivers less complex and adjust them for fast time varying szenarios it is proposed to provide an error estimating unit to said receivers for calculating a compensating coefficient representing the quota and/or the phase position of the image signal of the second carrier signal being included in the first carrier signal and to remove the undesired image signal in response to said compensating coefficient.Type: GrantFiled: November 6, 2003Date of Patent: November 6, 2007Assignee: Evolium S.A.S.Inventors: Friedrich Endress, Luc Dartois
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Publication number: 20070242669Abstract: A method is dedicated to broadcasting multimedia data in multimedia sessions set up in an FDMA/TDMA type communication network comprising cells associated with base stations adapted to broadcast the multimedia data to mobile communication terminals. This method consists in, on the one hand, controlled synchronization, relative to a reference clock, of the times of broadcasting identical multimedia data relating to the same multimedia session in each base station that the multimedia session concerns and, on the other hand, configuration of each of the base stations concerned so that they broadcast the identical multimedia data of the multimedia session during chosen periods by means of at least one chosen common carrier frequency and in at least one common chosen time slot.Type: ApplicationFiled: April 11, 2007Publication date: October 18, 2007Applicant: Alcatel LucentInventors: Jacques ACHARD, Luc DARTOIS
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Patent number: 7142828Abstract: The invention concerns a unit for sending from a base station to terminals in a telecommunications system, said unit comprising at least two sending channels or groups of sending channels adapted to send on a plurality of adjacent carrier frequencies, said channels being able to send in spatial diversity mode so that the same information may be sent by the channels or groups of channels on the same carrier frequency or frequencies. In this unit the channels or groups of channels use at least one common carrier frequency for sending in spatial diversity mode and at least one of the channels or groups of channels comprises at least one different frequency for sending without spatial diversity or with a lower degree of spatial diversity.Type: GrantFiled: January 31, 2003Date of Patent: November 28, 2006Assignee: Evolium S.A.S.Inventor: Luc Dartois
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Patent number: 6922569Abstract: The invention relates to a method of transmitting calls in a cellular type telecommunications system using a plurality adjacent carrier frequency bands and in which a first cell or a first site uses only a fraction of said frequency bands, the transmitted signals being subjected to peak clipping prior to application to an amplifier of a transmitter system in order to optimize the efficiency of the amplifier. Prior to being applied to the input of the amplifier, the signals (32) to be transmitted for the first cell (or first site) are subjected to filtering (28) so that the power density of the peak-clipping noise is not eliminated in adjacent frequency bands (f2, f3) that are unused by said first cell.Type: GrantFiled: November 15, 2002Date of Patent: July 26, 2005Assignee: Evolium S.A.S.Inventor: Luc Dartois
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Publication number: 20050107047Abstract: The invention concerns a unit for sending from a base station to terminals in a telecommunications system, said unit comprising at least two sending channels or groups of sending channels adapted to send on a plurality of adjacent carrier frequencies, said channels being able to send in spatial diversity mode so that the same information may be sent by the channels or groups of channels on the same carrier frequency or frequencies. In this unit the channels or groups of channels use at least one common carrier frequency for sending in spatial diversity mode and at least one of the channels or groups of channels comprises at least one different frequency for sending without spatial diversity or with a lower degree of spatial diversity.Type: ApplicationFiled: January 31, 2003Publication date: May 19, 2005Inventor: Luc Dartois
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Patent number: 6885709Abstract: A method for the linearization of a wide frequency band power amplifier. The frequency band of operation of the amplifier is divided into at least two groups or subbands. The instantaneous frequency of each sampled input signal is measured in order to determine the group or subband to which it belongs, and predistortions are applied to the input signal, these predistortions depending on the frequency group. The method is particularly useful for the linearization of a power amplifier of a transmitter.Type: GrantFiled: October 29, 1999Date of Patent: April 26, 2005Assignee: AlcatelInventor: Luc Dartois
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Patent number: 6774834Abstract: The invention relates to a method of preparing signals (X and Y) to be compared to establish predistortion at the input of an amplifier (12), the signals comprising a signal (X) before amplification and a signal (Y) after amplification by said amplifier. Preparation includes time aligning (22) the signal before amplification (X) with the signal after amplification (Y) before using them to establish said predistortion. The invention preferably operates in two stages, namely a stage of coarse time alignment, in which the signal before amplification (X) is subjected to a time delay comprising an integer number of first time units, and a stage of fine time alignment, in which a delay or advance value of a fraction of the first time unit is determined.Type: GrantFiled: January 16, 2003Date of Patent: August 10, 2004Assignee: Evolium S.A.S.Inventor: Luc Dartois
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Publication number: 20040127188Abstract: The invention relates to a direct conversion receiver for down-converting a received multi-carrier signal comprising at least a first and a second carrier signal at image carrier frequencies to a base band resulting in that the first carrier signal includes an image signal of said second carrier signal. Further, the known direct conversion receiver comprises at least a first and a second digital down-converter unit for separating the first and the second carrier signal from the down-converted multi-carrier signal after digitization. In order to make such receivers less complex and adjust them for fast time varying szenarios it is proposed to provide an error estimating unit to said receivers for calculating a compensating coefficient representing the quota and/or the phase position of the image signal of the second carrier signal being included in the first carrier signal and to remove the undesired image signal in response to said compensating coefficient.Type: ApplicationFiled: November 6, 2003Publication date: July 1, 2004Applicant: ALCATELInventors: Friedrich Endress, Luc Dartois
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Publication number: 20040042559Abstract: The invention relates notably to a method for scaling peak power amplitudes in a signal at a transmitter before submitting said signal to a power amplifier.Type: ApplicationFiled: July 21, 2003Publication date: March 4, 2004Applicant: ALCATELInventors: Peter Jaenecke, Jens Strauss, Luc Dartois