13results about "Optical transmission for RF signal generation/processing" patented technology

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.

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.

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.

Systems and methods include a Terahertz (THz) interposer assembly comprising a THz interposer and a plurality of THz waveguides. The THz interposer defines a plurality of first ports and a plurality of second ports. Each of the plurality of THz waveguides is disposed within the THz interposer. Each of the plurality of THz waveguides extends between a respective one of the plurality of first ports and a respective one of the plurality of second ports. Each of the plurality of THz waveguides is configured to propagate, between the respective one of the plurality of first ports and the respective one of the plurality of second ports, one or more THz signals having a frequency in a range between 300 Gigahertz (GHz) and 10 THz with a propagation loss in a range between 0.001 decibels (dB) per centimeter (cm) and 1.0 dB per cm.

This wireless communication method is for a wireless communication system comprising an aggregation station and an extension station that performs beamforming in accordance with aggregation station control, wherein: the aggregation station performs extension station beamforming control by transmitting, to the extension station via an optical transmission path, an optical signal including a beam control signal for at least controlling beamforming at the extension station and a transmission signal which is data to be transmitted; and the extension station transmits the transmission signal by setting a phase shifter, or configuring a setting by means of a switch change, to a phase difference for forming a beam in a specific direction on the basis of the beam control signal included in the optical signal.　

This invention provides a network node comprising: an optical fibre interface configured to receive, from one or more remote optical sources, a first optical signal, a second optical signal and a third optical signal, wherein the first, second and third optical signals each have a respective wavelength within an optical fibre transmission band being one of the O-band, E-band, S-band, C-band, L-band, and U / XL-band; one or more wavelength converters configured to convert the wavelength of one or more of the first optical signal, second optical signal and third optical signal; and a Rydberg-atom based transmission medium configured to be excited by the first optical signal, second optical signal and third optical signal, following wavelength conversion of one or more of the first optical signal, second optical signal and third optical signal, such that electrons of the Rydberg-atom based transmission medium are excited to a predetermined Rydberg state.

A conforming dismount antenna for use in a communication system includes a signal converter, a modulation component, a flexible fiber optic cable, and a flexible radiating element. The flexible fiber optic cable connects the conforming dismount antenna to a radio transceiver. The conforming dismount antenna bends to the contours of the user wearing the conforming dismount antenna or conforming to the contours of camouflage netting resting on a vehicle. When transmitting or receiving a broadcast, the conforming dismount antenna converts the radio frequency signal into a digital optical signal within the conforming dismount antenna. Communication systems including the conforming dismount antenna and methods of using the conforming dismount antenna are also described.

An optical communication system includes N optical modules at the local end. Each optical module includes a first optical interface and a second optical interface. A first optical interface of a first optical module in each of the N optical modules at the local end is connected to a peer end through a common optical fiber. A second optical interface of an ith optical module in the N optical modules at the local end is connected to a first optical interface of an (i+1)th optical module in the N optical modules at the local end, and i=1, 2, . . . , N−1.

TITLE Radio Frequency Signal Multiplexing Device, Radio Frequency Signal Demultiplexing Device and Associated Digital Processing System The present invention relates to a radio frequency 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.Figure for the abbreviation: Figure 2.

The present invention - An optical device (6) for generating an optical carrier signal (7), - A transmitting device (4) configured to emit electrical transmission signals (16, 17, 18) based on an optical carrier signal (7) and A sensor system (2) for peripheral detection having, - An electro-optic modulator (8) having a predetermined working point (10), - An electro-optic modulator (8) is configured to generate a plurality of optical oscillating signals (9) based on a predetermined working point (10) and an optical carrier signal (7), such that the plurality of optical oscillating signals (9) have different frequency bands (20, 21, 22), The present invention relates to a sensor system (2) having a transmitting device (4) configured to convert a plurality of optical transmitting signals (9) into a plurality of electrical transmitting signals (16, 17, 18), and to transmit the plurality of electrical transmitting signals (16, 17, 18) by at least one wireless-based transmitting unit (12, 13, 14). Furthermore, the present invention relates to a method and a motorized vehicle (2).

A method of RF signal processing comprises receiving an incoming RF signal at each of a plurality of antenna elements that are arranged in a first pattern. The received RF signals from each of the plurality of antenna elements are modulated onto an optical carrier to generate a plurality of modulated signals that each have at least one sideband. The modulated signals are directed along a corresponding plurality of optical channels with outputs arranged in a second pattern corresponding to the first pattern. A composite optical signal is formed using light emanating from the outputs of the plurality of optical channels. Non-spatial information contained in at least one of the received RF signals is extracted from the composite signal.

This application provides a beamforming system, which may be applied to the fields of wireless communication systems, autonomous driving, artificial intelligence, and the like. Small-scale, low-power, and fast-response two-dimensional beamforming can be implemented. The system includes a first optical diffraction module and a second optical diffraction module array, the first optical diffraction module includes at least one input port and a plurality of output ports, and each second optical diffraction module in the second optical diffraction module array includes one input port and a plurality of output ports. The first optical diffraction module is configured to receive at least one path of first signal light, and generate a plurality of paths of second signal light with different phases based on the at least one path of first signal light. Each second optical diffraction module is configured to receive one path of second signal light in the plurality of paths of second signal light, and generate a plurality of paths of third signal light with different phases based on the one path of second signal light, where the plurality of paths of third signal light are used to generate a plurality of paths of first radio frequency signal.

Systems and methods include a Terahertz (THz) interposer assembly comprising a THz interposer and a plurality of THz waveguides. The THz interposer defines a plurality of first ports and a plurality of second ports. Each of the plurality of THz waveguides is disposed within the THz interposer. Each of the plurality of THz waveguides extends between a respective one of the plurality of first ports and a respective one of the plurality of second ports. Each of the plurality of THz waveguides is configured to propagate, between the respective one of the plurality of first ports and the respective one of the plurality of second ports, one or more THz signals having a frequency in a range between 300 Gigahertz (GHz) and 10 THz with a propagation loss in a range between 0.001 decibels (dB) per centimeter (cm) and 1.0 dB per cm.