159results about "Optical transmission for RF signal generation/processing" patented technology

An apparatus (100) for detecting an Electro-Magnetic, EM, field, said apparatus comprising a: Rydberg-Atom EM Field Detector (107), RAEM-FD, configured to detect an EM field (170) of a given frequency; and Multi-Plate WaveGuide (105), MPWG, comprising: at least three overlapping and non-intersecting plates (180); and at least two waveguides (190), each formed by an adjacent pair of the at least three plates, and wherein each waveguide has a separation distance suitable (h) for supporting propagation of the EM field; and wherein the MPWG is arranged so as to direct the EM field towards the RAEM-FD.

This invention provides an electromagnetic field detector, a system comprising the electromagnetic field detector, and a method of operating an electromagnetic field detector, the electromagnetic field detector comprising a first optical signal interface configured to receive, from one or more remote optical sources, a first optical signal; an electromagnetic field transmitter configured to transmit a local oscillator electromagnetic field generated from the first optical signal, the electromagnetic field transmitter comprising: a photocurrent generator configured to generate a photocurrent from the first optical signal; and an antenna interface configured to supply the photocurrent to an antenna to transmit the local oscillator electromagnetic field; a second optical signal interface configured to receive, from the one or more remote optical sources, a probe optical signal and a coupling optical signal; and a transmission medium configured to be excited by the probe optical signal and further excited by the coupling optical signal, wherein the probe optical

The subject matter described herein relates to various antenna element configurations, antenna array configurations, their operations including various systems and methods to generate modulated data for transmission by an RF antenna array via an optical processing engine. The subject matter includes optical processing engine structure and methods (e.g., modulating in the optical domain, MIMO and spatial modulation via RF beam formation, coherent transmission of RF signal components, coherent operation of spatially separate RF antenna arrays) that may be implemented with the various RF antenna array structures. In some examples, the system combines the virtues of digital, analog and optical processing to arrive at a solution for scalable, non-blocking, simultaneous transmission to multiple UE-s. Much of the system architecture is independent of the RF carrier frequency, and different frequency bands can be accessed easily and rapidly by tuning the optical source (TOPS). In some examples, multiple communication channels may be transmitted simultaneously to different locations. The transmitter may be formed by an array of optically fed antennas.

This invention provides an electromagnetic field detector, a system comprising the electromagnetic field detector, and a method of operating an electromagnetic field detector, the electromagnetic field detector comprising a first optical signal interface configured to receive, from one or more remote optical sources, a first optical signal; an electromagnetic field transmitter configured to transmit a local oscillator electromagnetic field generated from the first optical signal, the electromagnetic field transmitter comprising: a photocurrent generator configured to generate a photocurrent from the first optical signal; and an antenna interface configured to supply the photocurrent to an antenna to transmit the local oscillator electromagnetic field; a second optical signal interface configured to receive, from the one or more remote optical sources, a probe optical signal and a coupling optical signal; and a transmission medium configured to be excited by the probe optical signal and further excited by the coupling optical signal, wherein the probe optical signal has a probe frequency set to excite electrons of the transmission medium to a first excited state and the coupling optical signal has a coupling frequency set to excite electrons of the transmission medium to a predetermined Rydberg state so as to induce an Electromagnetic Induced Transparency, EIT, effect, wherein the transmission medium is further configured to receive a phase-modulated electromagnetic field from a remote transmitter and the local oscillator electromagnetic field such that the combination of the phase-modulated electromagnetic field and the local oscillator electromagnetic field causes a change in the probe optical signal from which a phase state of the phase-modulated electromagnetic field can be detected.

A Rydberg atom television receiver is disclosed. The receiver comprises a probe laser, a source polarizing beam displacer, a Rydberg atom receiver cell, receiver atoms, a detector polarizing beam displacer, a detector polarizing beam cube, a first photodiode, a second photodiode, a differential amplifier, a display, and a coupling laser. The receiver receives a modulated waveform imprinted on a radiofrequency carrier a displays a graphical representation corresponding to a modulation source.

An artificial intelligence (AI) driven linearizer for a transmitter, comprising an input interface for inputting linearizer signals comprising information carrying signals, and operating conditions parameter signals, other than the information carrying signal, wherein the operating conditions parameter signals represent metrics affecting transfer characteristics of the transmitter, over a selected operating range of the transmitter, and a predistortion actuator circuit configured with an AI predistortion model for predistorting at least part of the information carrying signal to produce predistorted signals, the predistortion model being configured to be operable for adaptation to said characteristics of the transmitter using a single set of model coefficients that are unchanged over said entirety of said selected operating range.

A radio system includes a feed network, an edge wavelength switching system (EWSS), a photodetector, and a broadband lens-based antenna subsystem. The feed network aggregates a plurality of unmodulated optical carriers and modulated optical carriers for delivery to an optical link. The EWSS receives the plurality of unmodulated optical carriers and modulated optical carriers from the optical link, and selects a first unmodulated carrier and a first modulated carrier as a first selected optical carrier pair. The photodetector receives the first selected carrier pair from the EWSS and generates a first electrical signal from an optical beat of the first unmodulated carrier with the first modulated carrier. The broadband lens-based antenna subsystem receives the first electrical signal from the photodetector, propagates the received first electrical signal through a lens body, and outputs a first directional wireless beam signal containing signal data from the first modulated carrier.

A quantum radio frequency (RF) signal transmitter may include a plurality of Rydberg cells, each configured to generate a respective RF signal. A combiner downstream from the plurality of Rydberg cells may be configured to combine the respective RF signals into an output RF signal.

Described herein is a data processing device (100) including an input (102) for receiving an input signal including a data stream to be processed. A reconfigurable transversal filter (106) is adapted to perform one or more temporal signal processing functions on the input signal to produce one or more processed output signals (110-114). Filter (106) includes an optical frequency comb generator (108) to generate a plurality of discrete, equally spaced frequency channels (116). Filter (106) also includes a modulator (132) configured to modulate the input signal with each frequency channel (116) to generate modulated frequency channels having the input data stream encoded therein. An optical delay device (136) selectively applies a frequency dependent temporal delay to each of the modulated frequency channels such that each of the modulated frequency channels are temporally shifted by a predefined temporal period to produce delayed modulated frequency channels. Filter (106) also includes an optical spectral shaper (138) is configured to selectively apply respective amplitude weightings to the frequency channels (116) before or after modulation and delay. Filter (106) further includes one or more photodetectors (140-144) configured to sum one or more of the delayed modulated frequency channels to generate the one or more processed output signals. Device (100) also includes a controller (130) configured to dynamically control the amplitude weightings to the frequency channels (116) to define the signal processing functions.

Network elements and methods of use, including a transmitter comprising a client-side input, signal and clock conditioning blocks, a modulation block, and antennas. The client-side input receives baseband signals having client data. The signal conditioning block adjusts signal characteristics of the baseband signals to generate intermediate signals. The clock conditioning block receives a first clock signal having a first clock frequency and adjusts signal characteristics of the first clock signal to generate a second clock signal having a harmonic frequency of the first clock frequency. The modulation block modulates the intermediate signals onto the second clock signal to generate antenna feed signals. The antennas generate radiated signals based on the antenna feed signals and couple the radiated signals into hollow waveguides. The radiated signals are radiated electromagnetic waves configured for coherent detection with a transmission frequency in a range between 300 Gigahertz (GHz) and 10 Terahertz (THz).

The present application relates to a distributed antenna system, a method and an apparatus. The distributed antenna system comprises a digital-analog expansion unit and a remote cascade chain, the remote cascade chain comprising multiple remote units cascadingly connected by means of radio frequency cable, and a first remote unit of the remote cascade chain being connected to the digital-analog expansion unit by means of radio frequency cable. The digital-analog expansion unit is used to perform a baseband processing operation on a received external signal, and to perform interconversion of an analog RF signal and a digital RF signal. On this basis, the digital-analog expansion unit and the remote units use a cable connection-based daisy chain topology, which can both increase transmission bandwidth and effectively decrease transmission link costs; in addition, baseband processing being executed by the digital-analog expansion unit, and a remote unit not requiring baseband processing equipment, can effectively lower system component costs and operating power consumption. The present system is characterized by multi-mode, multi-band support and cell splitting, is easy to expand, and has low construction difficulty.

A frequency transition device includes: a light wavelength multiplexing unit to perform wavelength multiplexing on pilot light with respect to carrier light; and a light intensity modulation unit to perform light intensity modulation on post-pilot light multiplexing carrier light obtained by the light wavelength multiplexing unit with a frequency transition target signal, and output intensity modulation light. Furthermore, the frequency transition device includes: a light wavelength demultiplexing unit to demultiplex the intensity modulation light output from the light intensity modulation unit into a wavelength component of the carrier light and a wavelength component of the pilot light; a light pulse compression unit to compress the wavelength component of the carrier light along a time axis, and output time compression pulse light; and a control unit to control the light intensity modulation of the light intensity modulation unit.

In a general aspect, a communication system comprises a first station and a second station. Each station includes a transceiver and a control subsystem. The transceiver includes having one or more photonic crystal masers and one or more photonic crystal receivers. The control subsystem includes one or more lasers optically coupled to the one or more photonic crystal masers and the one or more photonic crystal receivers. The control subsystem also includes modulation electronics in communication with the one or more lasers and configured to control one or more properties of a first input optical signal received by each photonic crystal maser. The control subsystem additionally includes demodulation electronics in communication with the one or more lasers and configured to control one or more properties of a second input optical signal received by each photonic crystal receiver.

This invention provides a telecommunications network comprising a device and at least one network node. The device comprises a Rydberg-atom based Electromagnetic (EM) signal receiver and an uplink telecommunications interface. The Rydberg-atom based EM signal receiver may be configured in a first Rydberg state for reception at a first frequency. The device may send a request for data via the uplink telecommunications interface. Responsive thereto, the at least one network node may send a first configuration signal at the first frequency to the Rydberg-atom based EM signal receiver, the configuration signal identifying configuration parameters for the Rydberg-atom based EM signal receiver so as to configure the Rydberg-atom based EM signal receiver to a second Rydberg state for reception at a reserved frequency such that a data signal at the reserved frequency causes a detectable change in the Rydberg-atom based EM signal receiver in the second Rydberg state.

In a general aspect, a communication system comprises a first station and a second station. Each station includes a transceiver and a control subsystem. The transceiver includes having one or more photonic crystal masers and one or more photonic crystal receivers. The control subsystem includes one or more lasers optically coupled to the one or more photonic crystal masers and the one or more photonic crystal receivers. The control subsystem also includes modulation electronics in communication with the one or more lasers and configured to control one or more characteristics of a first input optical signal received by each photonic crystal maser. The control subsystem additionally includes demodulation electronics in communication with the one or more lasers and configured to control one or more characteristics of a second input optical signal received by each photonic crystal receiver.

The present disclosure relates to an optical line terminal that can be used in an optical fiber access system based on passive optical networks. The present disclosure further relates to a PON system; in particular the optical line terminal can be configured such that colourless components can be employed in a PON system using the optical line terminal and such that wireless communication can be directly employed in a PON system. One embodiment relates to an optical line terminal for a passive optical network, comprising at least a first transmitter for generating a time division multiplexed (TDM) optical carrier signal, said first transmitter comprising a first time lens optical signal processor configured to convert the TDM optical carrier signal to an wavelength division multiplexed (WDM) optical carrier signal for distribution to a plurality of users / ONUs, at least a second transmitter for generating a wavelength division multiplexed (WDM) downstream optical data signal for distribution to said plurality of users / ONUs, and at least one receiver for receiving and processing an upstream signal from said users.

An electronic device may include wireless circuitry with light sources that emit optical local oscillator (LO) signals onto optical paths coupled to a photomixer of an antenna. An electro-optical modulator (EOM) on an optical path may modulate one of the LO signals using an intermediate frequency signal and single sideband carrier suppression. The antenna may transmit and receive radio-frequency signals at the same frequency without adjustment to the LO signals. The frequency of the radio-frequency signals is equal to an offset between LO signals plus the frequency of the intermediate frequency signal. This may allow the device to switch between transmission and reception and / or frequencies of the radio-frequency signal without adjusting the optical LO signals, which prevents needing to re-lock the phases of the light sources and optimizes wireless performance.

A beamforming apparatus and method are provided, to implement fully connected beamforming by using a wavelength division multiplexing technology. In a manner, in this application, radio frequency signals are modulated on laser signals with different wavelengths, and then after combination and splitting, phase adjustment is selectively performed on the radio frequency signals with the different wavelengths on paths through wavelength selection units, to change transmit angles of beams transmitted at antenna ends. In another manner, in this application, radio frequency signals are modulated on laser signals with different wavelengths, each path of optical signal in the modulated radio frequency signal is split into a plurality of paths for phase adjustment, and then the phase-adjusted signals are combined and sent, to change transmit angles of beams transmitted at antenna ends. In addition, the solutions provided in this application are applicable to direct modulation and direct detection, and are also applicable to heterodyne or homodyne coherent detection.

An apparatus (100) for detecting an Electro-Magnetic, EM, field, said apparatus comprising a: Rydberg-Atom EM Field Detector (107), RAEM-FD, configured to detect an EM field (170) of a given frequency; and Multi-Plate WaveGuide (105), MPWG, comprising: at least three overlapping and non-intersecting plates (180); and at least two waveguides (190), each formed by an adjacent pair of the at least three plates, and wherein each waveguide has a separation distance suitable (ℎ) for supporting propagation of the EM field; and wherein the MPWG is arranged so as to direct the EM field towards the RAEM-FD.

Disclosed is a wideband device (D) for measuring the cross-correlation of a first signal and a second signal, comprising: a first frequency-shift optical cavity (DBDF, BDF1) comprising a first frequency shifter (AOM1) capable of shifting the optical frequency of the first signal from a first frequency f1 by going back-and-forth in the first cavity, the first cavity having a first time-of-flight τ1; a second frequency-shift optical cavity (DBDF, BDF2) comprising a second frequency shifter (AOM1 ) capable of shifting the optical frequency of the second signal from a second frequency f2 by going back-and-forth in the second cavity, the second cavity having a second time-of-flight τ2; the first and the second optical cavity being designed so that a maximum number of trips back-and-forth of the first and second signal in the first and second cavity is equal to predetermined N, a detector (PD) suitable for coherently detecting the first signal transmitted by the first cavity and the second signal transmitted by the second cavity and generating a photocurrent (Tr) proportional to a luminous intensity detected by the detector, a low-pass filter (LP) suitable for filtering frequencies of the photocurrent below min (I), a processor (UT) configured to calculate a Fourier transform of the photocurrent, so as to generate an output signal (SS) that is representative (II).

A signal transmission method and an apparatus are disclosed. In this method, a first communication apparatus generates a full-wave radio frequency electrical signal, and converts the full-wave radio frequency electrical signal into a half-wave radio frequency optical signal. The half-wave radio frequency optical signal is a radio frequency optical signal having a positive half-amplitude or a negative half-amplitude of the full-wave radio frequency electrical signal. The first communication apparatus sends the half-wave radio frequency optical signal. A second communication apparatus receives the half-wave radio frequency optical signal, and converts the half-wave radio frequency optical signal into the full-wave radio frequency electrical signal. It can be learned that, compared with a radio frequency optical signal having a full amplitude of the full-wave radio frequency electrical signal, average optical power of the half-wave radio frequency optical signal is lower, reducing transmit optical power between the first communication apparatus and the second communication apparatus. This helps reduce power consumption of an optical component. When an optical signal is transmitted between the first communication apparatus and the second communication apparatus through an optical fiber, the reduction of the transmit optical power further helps reduce a non-linear effect of optical fiber transmission, to reduce signal distortion caused by the non-linear effect of the optical fiber transmission.

A radio system includes a feed network, an edge wavelength switching system (EWSS), a photodetector, and a broadband lens-based antenna subsystem. The feed network aggregates a plurality of unmodulated optical carriers and modulated optical carriers for delivery to an optical link. The EWSS receives the plurality of unmodulated optical carriers and modulated optical carriers from the optical link, and selects a first unmodulated carrier and a first modulated carrier as a first selected optical carrier pair. The photodetector receives the first selected carrier pair from the EWSS, and generates a first electrical signal from an optical beat of the first unmodulated carrier with the first modulated carrier. The broadband lens-based antenna subsystem receives the first electrical signal from the photodetector, propagates the received first electrical signal through a lens body, and outputs a first directional wireless beam signal containing signal data from the first modulated carrier.

The present invention relates to an RF signal multiplexing device (22) comprising: - a plurality of RF inputs (44); - a plurality of frequency converters (50), each frequency converter (50) being associated with one or more RF inputs (44) and configured to receive RF signals from this or these RF inputs (44) and to convert them into optical signals; - a plurality of optical multiplexers (52), each optical multiplexer (52) being configured to multiplex at least two optical signals of different wavelengths; - a plurality of photoreceptors (54), each photoreceptor (54) being configured to convert a multiplexed optical signal into a multiplexed RF signal; - a plurality of RF outputs (46), each RF output (46) being configured to provide a multiplexed RF signal.

A beamforming apparatus and method are provided, to implement fully connected beamforming by using a wavelength division multiplexing technology. In this application, radio frequency signals are modulated on laser signals with different wavelengths; and then after combination and splitting, phase adjustment is selectively performed on the radio frequency signals with the different wavelengths on paths through wavelength selection units, to change transmit angles of beams transmitted at antenna ends. In another manner, in this application, radio frequency signals are modulated on laser signals with different wavelengths, each path of optical signal in the modulated radio frequency signal is split into a plurality of paths for phase adjustment, and then the phase-adjusted signals are combined and sent, to change transmit angles of beams transmitted at antenna ends. In addition, the solutions provided in this application are applicable to direct modulation, direct detection, and heterodyne or homodyne coherent detection.

An optical communication system in which an aggregation station and a plurality of extension stations are connected in series with one another with the aggregation station at the front, wherein: said aggregation station outputs a downlink optical signal generated by subjecting a wireless signal to an E / O conversion to the plurality of extension stations, and obtains a wireless signal by subjecting an uplink optical signal inputted from the plurality of extension stations to an O / E conversion; each of the extension stations transmits a wireless signal obtained by subjecting the downlink optical signal received from the aggregation station to an O / E conversion, transmits an uplink optical signal generated by subjecting the received wireless signal to an E / O conversion to the aggregation station; and the wavelengths of the uplink optical signals and downlink optical signals assigned to the plurality of extension stations are identical.

The invention relates to a sensor system (2) for environment detection, comprising:-an optical device (6) for generating an optical carrier signal (7),-a transmitting device (4), which is designed to emit an electrical emission signal (16, 17, 18) based on the optical carrier signal (7), comprising:-an electro-optical modulator (8), which has a predetermined operating point (10),-an electro-optical modulator (8), which has a predetermined operating point (10), the invention relates to a device (1) for transmitting a plurality of optical radiation signals (9), comprising:-an optical carrier signal (7), which is designed to generate a plurality of optical radiation signals (9) on the basis of a predetermined operating point (10) and the optical carrier signal (7) in such a way that the plurality of optical radiation signals (9) have mutually different frequency bands (20, 21, 22), and-a transmitting device (4), which is designed to convert the plurality of optical radiation signals (9) into a plurality of electrical radiation signals (16, 17, 18) and to transmit the plurality of electrical radiation signals (16, 17, 18) by means of at least one radio-based transmitting unit (12, 13, 18). A plurality of electrical radiation signals (16, 17, 18) are radiated from the radiation source (12, 14). The invention further relates to a method and to a motor vehicle (2).

The invention relates to a sensor system (2) for detecting surroundings, comprising — an optical device (6) for generating an optical carrier signal (7) and — a transmission device (4) which is designed to emit electric emission signals (16, 17, 18) which are based on the optical carrier signal (7), having: — an electro-optical modulator (8) which has a specified working point (10), wherein — the electro-optical modulator (8) is designed to generate a plurality of optical emission signals (9) on the basis of the specified working point (10) and the optical carrier signal (7) such that the plurality of optical emission signals (9) have frequency bands (20, 21, 22) which differ from one another, and — the transmission device (4) is designed to convert the plurality of optical emission signals (9) into a plurality of electric emission signals (16, 17, 18) and emit the plurality of electric emission signals (16, 17, 18) by means of at least one radio-based transmission unit (12, 13, 14). The invention additionally relates to a method and a motor vehicle (2).

An apparatus (100) for detecting an Electro-Magnetic, EM, field, said apparatus comprising a: Rydberg-Atom EM Field Detector (107), RAEM-FD, configured to detect an EM field (170) from a source (175); and a plurality of waveguides (105) for the RAEM-FD, wherein each of the plurality of waveguides is: configured to permit propagation of the EM field therethrough to the RAEM-FD; arranged around the RAEM-FD; and orientated towards a different direction.

A method, apparatus, and system for transmitting data. A radio frequency communications system comprising a computer system and a communications manager in the computer system. The communications manager is configured to identify data for transmission using radio frequency noise signals or other electromagnetic spectrum. The communications manager is configured to control an emission of laser beams at a set of optical breakdown points to cause optical breakdowns that generate radio frequency noise signals encoding the data.

This invention provides an electromagnetic field detector, a system comprising the electromagnetic field detector, and a method of operating an electromagnetic field detector, the electromagnetic field detector comprising a first optical signal interface configured to receive, from one or more remote optical sources, a first optical signal; an electromagnetic field transmitter configured to transmit a local oscillator electromagnetic field generated from the first optical signal, the electromagnetic field transmitter comprising: a photocurrent generator configured to generate a photocurrent from the first optical signal; and an antenna interface configured to supply the photocurrent to an antenna to transmit the local oscillator electromagnetic field; a second optical signal interface configured to receive, from the one or more remote optical sources, a probe optical signal and a coupling optical signal; and a transmission medium configured to be excited by the probe optical signal and further excited by the coupling optical signal, wherein the probe optical signal has a probe frequency set to excite electrons of the transmission medium to a first excited state and the coupling optical signal has a coupling frequency set to excite electrons of the transmission medium to a predetermined Rydberg state so as to induce an Electromagnetic Induced Transparency, EIT, effect, wherein the transmission medium is further configured to receive a phase-modulated electromagnetic field from a remote transmitter and the local oscillator electromagnetic field such that the combination of the phase-modulated electromagnetic field and the local oscillator electromagnetic field causes a change in the probe optical signal from which a phase state of the phase-modulated electromagnetic field can be detected.