Abstract: A method for transmitting a downlink reference signal from a network entity to a mobile terminal via a radio unit connected to an antenna, used to geolocate the mobile terminal. The method is implemented by the radio unit and includes: receiving the reference signal from the network entity and destined for the mobile terminal; and transmitting the reference signal to the mobile terminal upon expiry of a delay period with respect to the transmission time of the reference signal by the network entity. The delay period has a value greater than a transmission travel time of a comparison signal between the network entity and the radio unit.

Abstract: A method for transmitting signals used to estimate the position of a user terminal. The method includes: transmitting a first signal between a network entity and the user terminal by traveling through a radio unit, the first signal being intended to enable a measurement relating to a transmission travel time between the network entity and the user terminal via the radio unit; and transmitting a second signal between the network entity and the radio unit, the second signal being intended to enable a measurement of a transmission travel time between the network entity and the radio unit; wherein at least one value of a transmission condition of the second signal, termed the second value, is dependent on a value of a transmission condition of the first signal, termed the first value.

Abstract: An optronic transceiver module capable of implementing an optical bidirectional communication of the point to point type via at least one main optical fibre is disclosed. The optronic transceiver module includes a first optical module for supervising an uplink signal received via the main optical fibre delivering a first supervision result, a first optical module for switching the bidirectional communication via the main optical fibre to a bidirectional communication via a backup optical fibre, and vice versa, the first optical switching module being controlled by the first optical supervision module depending on the first supervision result delivered.

Abstract: A method for equalization in an access network of passive optical network type. The method includes, for a given optical distribution network connecting a given input port of an optical line termination to a given plurality of optical network units: for at least one of the optical network units of the given plurality, obtaining a distance between the optical line termination and the optical network unit; determining a representative distance associated with the given optical distribution network, according to the one or more distances obtained; determining at least one equalization parameter, according to the representative distance; and equalizing transmission channels within the given optical distribution network, according to the at least one equalization parameter, each of the transmission channels connecting the given port of the optical line termination to one of the optical network units of the given plurality.

Abstract: An optronic transceiver module is disclosed. The optronic transceiver module includes an m to n main optical coupler capable of splitting a downlink signal into n downlink optical signals of the same power to be transmitted in n optical fibres, a first uplink optical coupler capable of splitting an uplink signal into two optical signals split according to a predetermined reference power ratio and delivering a low-power signal and a high-power signal, a first power measurement photodiode delivering a power measurement associated with a first low-power signal, the main optical coupler being capable of aggregating the high-power optical signal and a second uplink optical signal representative of an optical signal received via a second optical fibre, into an aggregated uplink optical signal.

Abstract: An optronic transceiver module capable of implementing an optical bidirectional communication of the point to point type via at least one main optical fibre is disclosed. The optronic transceiver module includes a first optical module for supervising an uplink signal received via the main optical fibre delivering a first supervision result, a first optical module for switching the bidirectional communication via the main optical fibre to a bidirectional communication via a backup optical fibre, and vice versa, the first optical switching module being controlled by the first optical supervision module depending on the first supervision result delivered.

Abstract: A device for inserting a plurality of optical beams into a single-mode optical fibre, a guiding structure of which is composed of a core with a first refractive index, a cladding with a second refractive index, and a coating with a third refractive index. The device includes an optical mixer configured to insert, into the single-mode optical fibre, the plurality of optical beams, at least one of which has a distribution of its radial and angular electromagnetic amplitude with a maximum amplitude peak in the cladding.

Abstract: A device for coherent detection of data transported in an optical incoming useful signal. The device includes: a first incoming single-mode optical fibre, injecting the incoming useful signal; a second incoming single-mode optical fibre, injecting an optical signal of optical frequency substantially equal to that of the incoming useful signal, referred to as an oscillation signal, a signal mixer in which one of the signals from the first or second fibre is separated into two signals having orthogonal polarisations, and where the other one of the signals from the first or second fibre is mixed with the two separate signals, producing a mixed signal; a detector of the transported data present in the mixed signal; and an amplitude modulator configured to modulate the oscillation signal before it enters the mixer, the modulation pattern having repetitive pulses of the same interval as a symbol time of the incoming useful signal.

Abstract: A device for coherently detecting data in an optical signal, called a useful signal, received over a first single-mode optical fibre. The device includes: a second single-mode optical fibre that receives an oscillation optical signal; a polarization-managing device that receives as input either, in a first case, the oscillation optical signal, or, in a second case, the useful signal, and that delivers as output two separate signals, over two single-mode optical guides. The coherently detecting device is configured so that a set of the three signals, which consists of the two separate signals and of either, in the first case, the useful signal, or, in the second case, the oscillation signal, is presented to a single photodiode.

Abstract: A device for coherently detecting data in an optical signal, called a useful signal, received over a first single-mode optical fibre. The device includes: a second single-mode optical fibre that receives an oscillation optical signal; a polarization-managing device that receives as input either, in a first case, the oscillation optical signal, or, in a second case, the useful signal, and that delivers as output two separate signals, over two single-mode optical guides. The coherently detecting device is configured so that a set of the three signals, which consists of the two separate signals and of either, in the first case, the useful signal, or, in the second case, the oscillation signal, is presented to a single photodiode.

Abstract: A device for inserting a plurality of optical beams into a single-mode optical fibre, a guiding structure of which is composed of a core with a first refractive index, a cladding with a second refractive index, and a coating with a third refractive index. The device includes an optical mixer configured to insert, into the single-mode optical fibre, the plurality of optical beams, at least one of which has a distribution of its radial and angular electromagnetic amplitude with a maximum amplitude peak in the cladding.

Abstract: A transmission system includes: an optical transmission module capable of modulating a first digital radio signal in order to obtain a first optical signal; an optical reception module capable of receiving a second optical signal and demodulating same in order to obtain a demodulated radio signal; and a digitizing module capable of digitizing the demodulated radio signal in order to obtain a second digital radio signal. The transmission module includes: a module for adding a first management signal to the first digital radio signal, the rate of the first management signal being less than that of the first digital radio signal. The optical digitizing module includes an extraction module capable of extracting a second management signal from the demodulated radio signal, the rate of the second management signal being less than that of the second digital radio signal.

Abstract: A method is provided for generating a plurality of electrical signals from polychromatic optical signals extracted from a set of optical fibers, a polychromatic signal including a plurality of predetermined wavelengths. An electrical signal is generated by using predetermined wavelengths. The method includes: grouping the extracted optical signals together into a polychromatic optical signal beam; separating the polychromatic signal beam into a plurality of monochromatic optical signal beams; and converting the plurality of separated monochromatic optical signal beams into the plurality of electrical signals.

Abstract: The invention relates to an optoelectronic transceiver device comprising a first optical connector (OC1) capable of connection to a first bidirectional optical fiber (OF1), and a second optical connector (OC2) capable of connection to a second bidirectional optical fiber (OF2), the device further comprising: an insertion-extraction module (ADM) capable of: extracting a wavelength (?Rx) from a plurality of wavelengths constituting a first optical signal received by the first optical connector (OC1) and transmitting the first optical signal without the extracted wavelength to the second optical connector (OC2); inserting a wavelength (?Tx) into a second optical signal received by the second optical connector (OC2) and transmitting the second optical signal with the inserted wavelength to the first optical connector (OC1); an electric-optical conversion module (EC1) capable of providing the insertion-extraction module with the wavelength (?Tx) inserted into the second optical signal from an incoming electric sig

Abstract: A transmission system includes: an optical transmission module capable of modulating a first digital radio signal in order to obtain a first optical signal; an optical reception module capable of receiving a second optical signal and demodulating same in order to obtain a demodulated radio signal; and a digitizing module capable of digitizing the demodulated radio signal in order to obtain a second digital radio signal. The transmission module includes: a module for adding a first management signal to the first digital radio signal, the rate of the first management signal being less than that of the first digital radio signal. The optical digitizing module includes an extraction module capable of extracting a second management signal from the demodulated radio signal, the rate of the second management signal being less than that of the second digital radio signal.

Abstract: The invention relates to an optoelectronic transceiver device comprising a first optical connector (OC1) capable of connection to a first bidirectional optical fibre (OF1), and a second optical connector (OC2) capable of connection to a second bidirectional optical fibre (OF2), the device further comprising: an insertion-extraction module (ADM) capable of: extracting a wave-length (?Rx) from a plurality of wavelengths constituting a first optical signal received by the first optical connector (OC1) and transmitting the first optical signal without the extracted wavelength to the second optical connector (OC2); inserting a wavelength (?Tx) into a second optical signal received by the second optical connector (OC2) and transmitting the second optical signal with the inserted wavelength to the first optical connector (OC1); an electric-optical conversion module (EC1) capable of providing the insertion-extraction module with the wavelength (?Tx) inserted into the second optical signal from an incoming electric si

Abstract: A reflective light-emitting device is provided for a WDM PON optical access network. The device includes a light source with an optical gain medium. The light-emitting device includes a light source with an optical gain medium, of wavelength that is self-seeding during a go-and-return passage of light between the optical gain medium and an optical reflective component defining the laser cavity. The optical reflective component is made up of an optical amplifier associated reflective optical connection to a polarizing device so that the polarization axis of the reflected light is the same as the polarization axis of the emitted light.

Abstract: The invention relates to a receiving device (Rx1_b) capable of receiving an optical signal emitted by an emitting device including a light source for emitting the optical signal, the optical signal being transmitted by a passive optical network having wavelength division multiplexing, the receiving device including: an optical amplifier (Amp_b) for amplifying the optical signal received from the emitting device; an optical detector (D_b) capable of detecting data in the amplified optical signal; an optical reflector (Ref_b) configured to return the amplified optical signal toward the emitting device, such as to tune the wavelength of the optical signal emitted by the emitting device by means of a round trip of the optical signal between the emitting device and the optical reflector.

Abstract: A method and device are provided for protecting a passive optical network including an optical-line terminal connected to a plurality of optical network terminals grouped set-wise. The method includes: obtaining a transmission schedule of the optical network terminals; comparing, by set, the schedule with the signals transmitted by the optical network terminals, and, if at least one optical network terminal of an assembly does not transmit in synchronization with the schedule, disconnecting the assembly.

Abstract: In a first aspect, the present invention provides a base band unit (BBU) (or a remote radio head (RRH)), including means for supplying an identifier of said unit to a microwave head (MWBBU or MWRRH)) connected to said BBU (or RRH) unit, the identifier being located within at least one predetermined control subchannel of a signal for digital radio. In a second aspect, the invention also provides a base band unit (BBU) (or a remote radio head (RRH)), including means for receiving an identifier of an RRH (or BBU) unit from a microwave head (MWBBU, or MWRRH)) to which said BBU (or RRH) unit is connected, the identifier being contained in at least one predetermined control subchannel of a signal for digital radio.