Commissariat a L'energie Atomique

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Columbia University

Fahrenheit Thermoscope LLC

France T&eacute;l&eacute;com

Dominique Morche

Yannis Tsividis

David Lachartre

Sharvil Pradeep Patil

Cedric Dehos

Colin Weltin-Wu

Alin Ratiu

Mariya Kurchuk

Arnaud Verdant

Baudouin Martineau

Marc Belleville

Tim Schenk

Laurent Alacoque

Michael Pelissier

Michaël Pelissier

Cédric Dehos

Naci Pekcokguler

Alfredo-Farid Bautista Delgado

Colln Weltin-Wu

James Wei

A multichannel transmit and/or receive system, each channel includes a DAC and a sigma-delta modulator the transfer function of which is expressed thus:OUT()=IN()·()+()·(),where OUT is the output signal of the sigma-delta modulator, IN is the input signal of the sigma-delta modulator, FTS is the transfer function of the input signal, Q is the quantization noise and FTB is the transfer function of the quantization noise, the second terms of the transfer function of the sigma-delta modulator only being distinct from one another for two channels Vi, Vj, in order to decorrelate the quantization noise of distinct channels, the first term of said transfer function for channel Vi being equal to the first term of said transfer function for channel Vj.

Multichannel transmit and/or receive system comprising at least N parallel processing channels and method for decorrelating quantization noise in such a system

A system for generating a radio frequency signal phase-locked to a reference signal. Such a system includes a rotary travelling wave oscillator including a conductive ring and a plurality of sustaining amplifying cells electrically connected to the ring; a programmable multiplexer device designed to electrically connect an input port of the system to an amplifying cell that can be selected from the cells of the plurality. The system is designed so that the oscillator generates the locked radio frequency signal when the reference signal is injected at the input port of the system. A phase difference between the radio frequency signal and the reference signal is a function of the amplifying cell to which the input port is electrically connected via the programming of the multiplexer device.

System for generating at least one radio frequency signal phase-locked to a reference signal, corresponding radio frequency transmitter and receiver

A multichannel transmitter device includes, on each channel: a transmission processing channel designed to process an input signal and comprising a predistortion block applying a predistortion to the input signal on the basis of predistortion coefficients, a DAC, a first analogue filter, a power amplifier and a sigma-delta encoder between the predistortion block and the digital-to-analogue converter and designed to carry out notably a quantization of the predistortion block; a return channel associated with the transmission processing channel and comprising a block for estimating predistortion coefficients so as to estimate predistortion coefficients on the basis of the input signal and of a feedback signal; the transmitter device wherein the block for estimating predistortion coefficients is designed to estimate the predistortion coefficients on the basis of at least the input signal and of a signal resulting from the subtraction, from the feedback signal, of a signal representing the quantization noise resulting from the quantization carried out by the sigma-delta encoder.

Transmitter device and methods for predistortion and decorrelation of noise in such a transmitter device

An RF signal detection device, including:

RF signal detection and identification device

A device and a method for determining the arrival time of a UWB signal including at least one pulse modulated at a carrier frequency. The receiver includes a frequency translation stage for translating the UWB signal to a first intermediate frequency and a second intermediate frequency. In an integration stage, the signals translated to the first intermediate frequency and to the second intermediate frequency are integrated on a time window to give a first integration result and a second integration result respectively. The phase deviation is determined between the first and second integration results and from this phase deviation, the arrival time of the UWB signal is deduced.

Device and method for determining the arrival time of a UWB signal

The invention concerns an analog to digital conversion and filtering circuit comprising: an input for receiving an analog input signal; an asynchronous continuous-time analog to digital converter adapted to generate, based on the analog input signal, a digital continuous-time signal; a feedback path comprising a digital continuous-time filter adapted to generate a filtered signal to be combined with the analog input signal, the digital continuous-time filter being adapted to generate the filtered signal by: filtering out at least one first frequency range of the digital continuous-time signal; and amplifying at least one second frequency range of the digital continuous-time signal.

Continuous time ADC and filter

A programmable, quantization error spectral shaping, alias-free asynchronous analog-to-digital converter (ADC) is provided. The ADC can be used for clock-less, continuous-time digital signal processing in receivers with modest Signal to Noise-plus-Distortion Ratio (SNDR) requirements and a tight power budget.

Systems and methods for implementing error-shaping alias-free asynchronous flipping analog to digital conversion

The invention relates to a method of estimating the time of arrival of a UWB pulse contained in an RF signal using a double quadrature receiver. The time of arrival is obtained from an estimate of the phase of the RF signal ((&#x3c6;(&#x3c4;))) relative to the local oscillator signal in the first stage of the quadrature mix, and an estimate of the phase of the baseband signal ((&#x3c6;(&#x3c4;)) relative to the first/second signal of the orthogonal base used in the second stage of the quadrature mix.

Method for determining the arrival time of a UWB pulse with a double quadrature receiver

Systems, devices, and methods for continuous-time digital signal processing and signal representation are disclosed. This includes a continuous-time analog-to-digital converter that is configured to receive an analog signal and convert it to a continuous-time digital signal without using a clock or any type of sampling. This A/D conversion can include a per-level representation and a per-edge representation of the analog signal to produce a digital signal. The digital signal can then be processed in a continuous-time signal processor. The continuous time signal representation and processing can have benefits such a providing filters in high frequency applications where sampling is not practical.

Systems, devices, and methods for continuous-time digital signal processing and signal representation

A method for configuring an electrical circuit comprising several functional blocks having characteristic quantities of the same type and the values whereof are mutually proportional, the functional blocks being built by means of at least one set of electrical elements of a similar type and means for connecting said electrical elements to one another and/or to the rest of the electrical circuit according to different connection configurations, comprising the steps consisting of:

Configuration method and device for electrical and/or electronic circuits

A method for digital compensation of nonlinearities in a communication system that includes a transmitter, a transmission channel and a receiver, including: estimating the nonlinearities induced by the transmitter and/or the receiver, from at least one learning sequence received at the receiver and distorted by the nonlinearities, and compensating for the nonlinearities distorting a signal received at the receiver based on the estimating of the nonlinearities.

Method for the digital compensation of nonlinearities in a communication system and receiver device

The invention concerns a method for compensating the non-linearity of a sigma-delta analog-to-digital converter (A) with quantization at N levels comprising a digital-to-analog converter (). The method comprises a calibrating step which consists in transforming the multibit sigma-delta analog-to-digital converter (A) into a sigma-delta analog-to-digital converter with quantization at three levels, then at two levels. The correction values of each level to be corrected are accurately measured. The method also comprises a normal functioning phase which consists, when the sigma-delta an analog-to-digital converter (A) is operating with quantization at N levels, in producing an instantaneous correction of errors of the analog-to-digital converter () using said correction values.

Method for compensating non-linearity of a sigma-delta analog-to-digital converter

The invention concerns a method for the correction of the IQ imbalance of a receiver, in order to obtain a corrected estimate of the IQ imbalance, including:

Method and a device to compensate for imbalances in a receiver

Receiver and reception method of receiving pulsed ultrawideband radio-frequency signals employ an amplification phase, an oscillation phase sensitive to an instability control signal, a shaping phase, and a demodulation phase, and further including an adaptation control step for adapting the receiver or the reception method to the type of signals to be received.

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Meylan, France

Dominique Morche