81 results about "Single side band" patented technology

A UE may measure a signal strength or signal quality of a serving cell. The UE may select whether to use an LP-WUR, a main radio, or both the LP-WUR and the main radio for signal monitoring based on the measured signal strength or signal quality of the serving cell. The signal monitoring may be associated with at least one of WUS monitoring, SSB monitoring, or RRM measurement. The signal strength or the signal quality of the serving cell may be measured using the main radio. The UE may receive an indication of at least one threshold from a network node. Whether to use the LP-WUR, the main radio, or both the LP-WUR and the main radio for the signal monitoring may be selected based further on the at least one threshold.

The present invention relates to a signal transmission technique in an asymmetric scenario. According to the present disclosure, a method of a terminal may be provided, the method comprising the steps of: performing downlink synchronization for a first TRP on the basis of a first SSB received from the first TRP; performing downlink synchronization for a second TRP on the basis of a second SSB received from the second TRP; receiving a system information block (SIB) from the first TRP on the basis of the first SSB; and performing a random access procedure with the first TRP and the second TRP.

The invention discloses a self-adaptive directional sound control method and system based on a multi-loudspeaker array. The method comprises the following steps: constructing an acoustic array by utilizing a plurality of loudspeakers distributed in different directions in the mobile terminal, performing single side band up-conversion processing on an audio signal, performing digital beam forming according to a target direction, and generating a plurality of paths of driving signals with phase difference and time delay difference, thereby forming a high-directivity sound field in a space. The system collects sound field feedback signals through a built-in microphone, and adopts a minimum mean square algorithm to adjust beam parameters in real time so as to compensate for terminal attitude, shielding and environmental noise changes and realize stable directional output of a sound field. The system further comprises a parameter library and sensor fusion module which supports adaptive calibration and multi-beam output of different devices. According to the invention, programmable directional sound transmission is realized without hardware modification, and the method has high privacy, low power consumption and strong robustness, and is suitable for private communication of an intelligent terminal and a multi-user audio partition playing scene.

1. The name of the design product: track (single sideband arc height track). 2. The use of the design product: used as a honeycomb curtain installation accessory. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The present invention relates to a user equipment (UE) served by a source cell of a first network node supporting a radio access network (RAN) distributed unit (DU) function and / or Layer 2 protocol processing. The UE includes a processor and memory, and executes instructions to select from a plurality of candidate target cells controlled by the first network node based on L3 measurements and generate L1 measurements. For L1 / L2 triggered mobility (LTM), the UE determines whether the candidate cells meet preset conditions for handover and preferably periodically transmits L1 measurement reports to the first node. The preset conditions include whether single-sideband (SSB) is detected and whether a first timer associated with the L3 measurement report has not expired since a first timestamp. The UE determines whether the timer has expired since a second timestamp, and the L3 measurement report is the most recent at the time of generating the L1 measurement report.

Overlaid frequency-domain reflection modulation is described. An apparatus is configured to shift a first order harmonic, with respect to an associated transmission signal, to a shifted frequency-domain position. The apparatus is configured to encode, based on the shifted frequency-domain position, an information bit over time-domain modulated information to generate an overlaid modulation information bit. The apparatus is configured to transmit, for a receiver and in accordance with a single sideband reflection, the overlaid modulation information bit. Another apparatus is configured to receive, from a transmitter and in accordance with a single sideband reflection, an overlaid modulation information bit based on a shifted first order harmonic, of an associated transmission signal, at a shifted frequency-domain position. The apparatus is configured to decode, based on the shifted frequency-domain position for the shifted first order harmonic, the overlaid modulation information bit in association with time-domain modulated information to generate an information bit.

Embodiments of the present disclosure relate to methods and apparatuses for sidelink synchronization signal block (S-SSB) transmission in unlicensed spectra. According to an embodiment of the present disclosure, a user equipment (UE) can include: a processor configured to: obtain configuration information for S-SSB in an unlicensed spectrum based on configuration or pre-configuration, wherein the configuration information includes condition (s) for determining a channel access failure prior to a target S-SSB occasion based on a listen before talk (LBT) type 1 procedure; perform a first LBT type 1 procedure associated with a first S-SSB occasion to initiate a first S-SSB channel occupancy starting from the first S-SSB occasion; and perform at least one of the following operations in response to determining a channel access failure prior to the first S-SSB occasion based on the first LBT type 1 procedure and the configuration information: performing a second LBT type 1 procedure associated with a second S-SSB occasion next to the first S-SSB occasion to initiate a second S-SSB channel occupancy starting from the second S-SSB occasion; continuing to perform the first LBT type 1 procedure prior to the second S-SSB occasion to initiate a second S-SSB channel occupancy starting from the second S-SSB occasion; or performing a first LBT type 2 procedure; a transmitter coupled to the processor and configured to transmit an S-SSB on the first S-SSB occasion in response to a channel being available for access prior to the first S-SSB occasion based on the first LBT type 1 procedure; and a receiver coupled to the processor.

Frequency shift of a clock signal The present description relates to an electronic device (200) configured to apply a frequency shift function to a first signal (Clk_F) having a first frequency (F) comprising: - a delay element (206) adapted to provide a second signal (Clk_F_D) corresponding to the first signal delayed by a duration equal to a first period of said first signal (Clk_F) divided by four; - a branch successively comprising a first circuit (201) adapted to divide the frequency of a signal by a number, a second integrator circuit (203), said branch being adapted to provide a third signal (Q_comp) and a fourth signal (I_comp); and a third single-sideband mixer circuit (208). Figure for abstract: Fig. 2

The invention relates to the field of optical access networks, and provides a phase bias optimization method and device for a passive optical network modulator, and the method comprises the steps: obtaining a single side band signal; driving a passive optical network modulator by using the single sideband signal, and modulating an optical carrier of the passive optical network modulator to obtain a modulated optical signal; acquiring a spectrum of the modulated optical signal; and adjusting the phase bias value of the passive optical network modulator according to the power difference between the primary sideband and the secondary sideband in the spectrum until the spectrum of the modulated optical signal obtained after adjustment is determined to present the single sideband characteristic. According to the invention, the phase bias of the passive optical network modulator is adjusted in real time by monitoring the power difference of the main and secondary sidebands in the spectrum of the modulated optical signal, so that the optimization efficiency and accuracy of the phase bias are improved.

An electronic device applies a frequency offset function to a first signal having a first frequency. The device includes a delay element configured to output a second signal corresponding to the first signal delayed by a duration equal to a first period of said signal divided by four. A circuit branch includes a first circuit configured to divide the frequency of the first signal by a given number coupled in series with a second circuit configured to implement an integration. The circuit branch outputs a third signal and a fourth signal. A single side band mixing circuit processes the first signal, second signal, third signal and fourth signal to generate an output signal.

The invention belongs to the technical field of optics, and particularly relates to an unequal-interval frequency comb generation and detection device and method based on a single side band modulator. In order to improve phase coherence between comb teeth, an arbitrary waveform generator generates a modulation signal, the modulation signal is amplified by a power amplifier and then input into a single-side-band phase modulator, a laser is connected with an optical signal input end of the single-side-band phase modulator, and an output end of the single-side-band phase modulator is connected with an optical beam splitter. The light beam splitter divides light into two paths, one path serves as reference light to enter the first detector, the first detector converts the reference light into an electric signal and then carries out FFT observation, the other path serves as detection light, is absorbed by the gas chamber and then is input into the second detector, and the second detector converts the detection light into an electric signal and then carries out FFT observation.

To provide a measuring device that can measure the characteristics of a coherent receiver separately from the characteristics of a transmitter, without the need to measure the characteristics of the transmitter in advance. [Solution] The measuring device according to the present disclosure comprises: a conversion unit that converts a single-sideband signal affected by the transmission characteristics of a transmitter into a first electrical signal; a receiving unit that coherently receives the single-sideband signal; and a measuring unit that uses a second electrical signal generated by coherently receiving the first electrical signal to determine the transmission characteristics and the receiving characteristics of the receiving unit.

Embodiments of the present disclosure relate to methods and apparatuses for sidelink synchronization signal block (S-SSB) transmission in an unlicensed spectrum. According to an embodiment of the present disclosure, a user equipment (UE) can include: a processor configured to: obtain configuration information for S-SSB in an unlicensed spectrum based on configuration or pre-configuration, wherein the configuration information includes at least one of the following: a first configuration associated with a time interval between adjacent S-SSB occasions sharing a same channel occupancy time (COT); a second configuration for performing listen before talk (LBT) type 2; or a third configuration for performing LBT type 1; and perform an LBT procedure associated with an S-SSB occasion based on the configuration information; a transmitter coupled to the processor and configured to transmit an S-SSB on the S-SSB occasion in response to the LBT procedure being successful; and a receiver coupled to the processor.

The invention provides a signal generation system. The signal generation system comprises an external modulation laser, an optical splitter, a Mach-Zehnder modulator, a phase shifter, an attenuator, a coupler and a photoelectric conversion unit. According to the invention, Mach-Zehnder modulation is carried out on optical carriers through asymmetric double single side band signals, and millimeter wave / terahertz signals in the form of optical signals are obtained through destructive interference between output signals of a phase shifter and an attenuator and optical signals subjected to Mach-Zehnder modulation. And finally, millimeter wave / terahertz signals in an electric signal form are obtained through the photoelectric conversion unit. Millimeter wave / terahertz signals are generated by adopting a single push-pull Mach-Zehnder modulator and attenuator optical double-single-side-band modulation, transmitter precoding and a complex and expensive I / Q modulator are avoided, the complexity and cost of the system can be effectively reduced, meanwhile, the frequency interval can be flexibly adjusted, and the system performance is improved. And the tunable range of the system is increased.

The present invention provides a single sideband signal generator, comprising: a modulator configured to generate a first modulated optical signal and a second modulated optical signal having the same amplitude; and the sideband suppression light circuit based on the first light delay line is used for generating a full-carrier single-side-band signal, and / or the sideband suppression light circuit based on the second light delay line is used for generating a carrier-suppressed single-side-band signal. The present invention simplifies the structure by saving half the space occupied by redundant signal electrodes, and also reduces the RF power consumption by half by removing an RF mixer. The provided single side band (SSB) signal generator has the advantages of compact structure, low cost and energy conservation. By reasonably designing the length of the optical delay line, the generator can be easily expanded to a higher frequency range on the premise of not needing extra cost.

Circuit and method for electro-optic modulation of an RF signal to produce a single-sideband reduced-carrier phase-shifted (SSB-RC-PS) modulated signal includes: receiving an optical carrier signal; receiving the RF signal; modulating the RF signal with a first portion of the optical carrier to produce a single sideband (SSB) modulated signal; amplitude and phase modulating a second portion of the optical carrier signal and combining with the modulated signal to produce a first combined signal, the amplitude modulation and phase modulation of the second portion of the optical carrier signal are dynamically controlled to directly match the amplitude and inversely match the phase of the modulated signal; and amplitude modulating and phase modulating a third portion of the optical carrier signal and combining third portion with the first combined signal to produce the second combined signal, the product of which is a single sideband reduced carrier phase shifted (SSB-RC-PS) modulated signal.

An acousto-optic modulator that includes a waveguide on an acoustic actuator is disclosed. The waveguide carries an optical signal having a UV or visible wavelength. When the acoustic actuator is activated, the optical signal in the waveguide is bathed in intense acoustic waves. By using a waveguide having the appropriate dimensions to strongly confine both the optical signal and the acoustic waves, strong optomechanical coupling may be achieved between the optical and acoustic modes, resulting in an efficient modulator. By employing either intra-modal or inter-modal conversion, the modulator may be used to implement a variety of dual- or single-sideband functions, including an isolator, a phase modulator, a single-sideband frequency shifter, or a high-extinction shutter.

Receiving device, comprising: a frequency mixer (11) configured to mix a received signal input therein and a local signal generated by a local oscillator (12) in order to convert a frequency of the received signal into a baseband; an envelope demodulator (13) configured to perform an envelope demodulation of an output of the frequency mixer (11); an upper sideband demodulator (14) configured to demodulate only one upper sideband of an output from the frequency mixer (11) by single-sideband demodulation; a lower sideband demodulator (15) configured to demodulate only one lower sideband of the output from the frequency mixer (11) by single-sideband demodulation; a first adder (16) configured to add an output from the envelope demodulator (13) and a first inverted output obtained by inverting an output from the upper sideband demodulator (14); a second adder (17) configured to add the output from the envelope demodulator (13) and a second inverted output obtained by inverting an output from the lower sideband demodulator (15); and a third adder (18) configured to add the output from the envelope demodulator (13), a third inverted output obtained by inverting an output from the first adder, and a fourth inverted output obtained by inverting an output from the second adder to produce a demodulation signal.

A method performed by a user equipment (UE) in a wireless communication system includes receiving synchronization signal / physical broadcast channel block (SSB) based on a channel bandwidth. The SSB is received in a resource region based on 240 contiguous subcarriers within four orthogonal frequency division multiplexing (OFDM) symbols. Based on the channel bandwidth being 3 MHz, the SSB is received in a resource region within the four OFDM symbols in which some of the 240 contiguous subcarriers are punctured. The resource region includes 12 resource blocks (RBs).

The application relates to a kind of optical and millimeter wave fusion bidirectional transmission system and method based on optical heterodyne, and belongs to the technical field of space optical communication.The application generates single sideband optical signal by means of optical heterodyne method, provides single sideband light source with carrier for space optical link and millimeter wave link, realizes multiplexing of relevant devices between the transmitting end of two links, between the receiving end and between the receiving end of space optical link and the transmitting end of millimeter wave link, and reduces the structural complexity of fusion bidirectional system.The transmission system can be divided into isomorphic bidirectional transmission mode and heterogeneous bidirectional transmission mode.In isomorphic bidirectional transmission mode, photodetector is time division multiplexed by space optical link and millimeter wave link.In heterogeneous bidirectional transmission mode, two light signals sharing photodetector completely overlap in frequency domain, and the decomposition of two signals is realized by prior information method.The application reduces the structural complexity of system by device multiplexing design, and promotes the development of fusion transmission in space-based and air-based network.

The invention belongs to the technical field of optical communication, and particularly discloses an optical fiber-visible light converged communication system for transmitting end signal reverse probabilistic shaping. According to the method, carrier waves are injected into a base band, a single side band signal is formed, a KK receiving scheme meeting the minimum phase condition is combined with an RPS strategy of distributing constellation probability to an outer ring, efficient and steady recovery of a mixed link receiving signal under the conditions of low signal-to-noise ratio and limited peak power is achieved, and the method has the advantages of being simple in structure and convenient to operate. And the phase reconstruction reliability is improved by setting a proper carrier signal power ratio. The method overcomes the defects of insufficient stability of peak constraint and phase recovery when strong carrier waves and low signal-to-noise ratio coexist in a traditional direct detection link and high peak-to-average power ratio and aggravated mutual information degradation of conventional probability shaping under the low signal-to-noise ratio, has higher noise immunity and spectral efficiency, and can be applied to the field of wireless communication. The method is a feasible scheme for a 6G indoor optical wireless access and optical fiber wireless optical integrated network.

Rather than having dedicated sideband signal pins for each port in a multi-port data storage device, a single set of sideband signal input pins can be used on a multiplexer (mux) so that the sideband signals can be reused and sent to each port. In so doing, a total number of pins is reduced which leads to a reduced bill of manufacture (BOM) and more available storage space in the data storage device.

The invention discloses an ultra wide band radio frequency signal frequency measurement system and method based on wavelength coding, and belongs to the field of radio frequency signal frequency measurement. According to the invention, by means of the high-precision wavelength encoder, the equivalent radio frequency range of 20THz can be covered in single sampling; a wavelength encoder with complex spectral response and an advanced reconstruction algorithm compress the minimum distinguishable frequency difference to 125MHz, and high-precision frequency measurement is considered while the broadband is kept; the electro-optical modulator supports a carrier suppression single side band modulation scheme of broadband signals and can be recovered at one time at the same time; modulation, coding, detection and digital processing can be completed in the same chip or in the same package, an off-chip optical fiber compensation or high-power temperature control loop is not needed, and the size and power consumption are remarkably reduced. According to the invention, the technical problem that multi-frequency real-time measurement, high resolution and high bandwidth cannot be considered at the same time is solved, and the method is applied to high-resolution and ultra-wideband real-time measurement of multi-tone broadband radio frequency signals.

This invention provides a sensitivity-enhanced temperature measurement device based on an optoelectronic oscillator, comprising: a laser, an intensity modulator, a delay line interferometer, a sensitive arm fiber optic unit located in the space where the signal to be measured is located, a reference arm fiber optic unit, a photodetector, a microwave amplifier, a bandpass filter, a power divider, and a frequency measurement section. The intensity modulator generates an optical signal containing two frequency components: a carrier wave f0 and a first-order single-sideband wave f1. The delay line interferometer then separates these two frequency components, allowing them to propagate separately along the reference arm and sensitive arm fibers. These components are then returned to the delay line interferometer and combined to output an optical signal whose phase contains the temperature signal to be measured. The phase change of the optical signal caused by the temperature signal to be measured is then converted into a frequency change in the microwave signal output by the optoelectronic oscillator. This invention also provides a sensitivity-enhanced temperature measurement method. The device provided by this invention can effectively improve the sensitivity of temperature detection.

The invention discloses an optical carrier suppression single side band modulation device and method based on a variable optical coupler. The device comprises a laser, a first adjustable optical coupler, an optical single side band modulation module, a second optical phase shifter and a fourth adjustable optical coupler. And the first adjustable optical coupler divides the optical carrier into two paths according to a preset proportion, and the two paths are respectively input into the optical single side band modulation module and the second branch, so that the power matching of the two paths of carriers is ensured. The optical single side band modulation module comprises a second adjustable optical coupler, a first optical phase shifter and a third adjustable optical coupler, and accurate splitting ratio control and phase adjustment are achieved. And the second optical phase shifter performs phase adjustment on the second branch optical carrier to enable the second branch optical carrier to be opposite to the carrier phase in the modulation signal, and a high-purity optical carrier suppression single side band signal is output through combination of a fourth adjustable optical coupler. According to the invention, through cooperative configuration of the multi-stage adjustable device, process errors are effectively overcome, the carrier-to-sideband suppression ratio and the system power efficiency are improved, and the method can be applied to the fields of radio over fiber communication and the like.

The invention discloses an information processing method, and the method comprises the steps: detecting a single side band modulation SSB signal after the SSB signal is received, and obtaining a first peak value of a main synchronization signal and a second peak value of an auxiliary synchronization signal which are included in the SSB signal; determining the position of a time slot head of the SSB signal based on the first peak value and the second peak value; and performing downlink beam synchronization based on the position of the time slot head. The invention further discloses an information processing device and equipment, a computer readable storage medium and a computer program product.

The present disclosure relates to a device and a communication method with which it is possible to perform appropriate filtering / image suppression when single side band modulation is used for D2R transmission of an A-IoT device. A device that has a lower complexity than an NB-IoT device comprises: a transmission unit that transmits to a wireless base station by using single side band modulation; and a control unit that selects either an upper side band or a lower side band in the single side band modulation, and uses the selected side band to perform transmission control of a transmission signal to the wireless base station.

The application discloses a five-dimensional coherent detection method and a receiver. The application is based on a dual-polarization 90-degree optical mixer, four pairs of balanced photodetectors, a single-ended photodetector and a digital domain light field reconstruction module, realizes complex light field reconstruction of single-sideband or double-sideband modulated local oscillator light, eliminates beat frequency damage between the local oscillator and a signal, and supports simultaneous coherent detection of polarization multiplexed signal light and single-sideband or double-sideband modulated local oscillator light. The application only needs to additionally increase a single-ended photodetector, uses the local oscillator light to transmit additional modulation information, and linearly expands the receiving signal dimension to five dimensions with the lowest hardware complexity. The application realizes linear expansion of the receiving dimension with the lowest hardware complexity.

The invention relates to the technical field of optical fiber sensing, in particular to an auxiliary fading suppression method and system in a phase-sensitive optical time domain reflectometer. Comprising the following steps: processing a digital signal at a transmitting end: modulating a transmitted pulse to enable the transmitted pulse to be a square pulse with cosine roll-off on a frequency spectrum; then, carrying out frequency shift processing on a single-side-band signal relative to a carrier wave; and receiving end digital signal processing: carrying out fading suppression on the received backward Rayleigh scattering signal through a frequency spectrum extraction and remixing algorithm. According to the method, the waveform with proper width and flat amplitude is designed at the transmitting end, so that a better fading suppression effect is realized in a frequency spectrum extraction and remixing algorithm.

The present application belongs to the technical field of communications. Disclosed are a signal transmission method, an information configuration method and apparatus, and a communication device. The signal transmission method in the embodiments of the present application comprises: a first device generating a first signal on the basis of first information, wherein the first signal is a baseband modulation signal; generating a second signal on the basis of the first signal and a received radio frequency carrier signal, wherein the radio frequency carrier signal is a single-tone signal, the second signal is a single-sideband backscatter modulation signal, and the bandwidth of the first signal is the same as the bandwidth of the second signal; and sending the second signal.