49 results about "Frequency domain multiplexing" patented technology

There is inter alia disclosed a user equipment. UE, for transmitting at least two parallel uplink transmissions associated with a common uplink information payload and including a first uplink transmission and a second uplink transmission, comprising means for:—receiving information indicative of a common frequency-domain resource allocation for the at least two parallel uplink transmissions:—determining, a first frequency-domain resource allocation for the first uplink transmission and a second frequency-domain resource allocation for the second uplink transmission at least based on the common frequency-domain resource allocation and on frequency-domain multiplexing information indicative of a frequency gap or a frequency offset between the first frequency-domain resource allocation and the second frequency-domain resource allocation; and—transmitting the first uplink transmission using the first frequency-domain resource allocation and transmitting the second uplink transmission using the second frequency-domain resource allocation.

A hybrid time domain multiplexing (TDM) and frequency domain multiplexing (FDM) configuration protocol for a doppler-based ultrasound fetal monitoring system (FMS) is provided. In an example, a FMS determines context information regarding an operating context of the FMS, the context information comprising a number of fetal sensor devices (FSDs) activated for monitoring a corresponding number of fetuses of a single mother, wherein the FSDs respectively comprise ultrasound transducers configured to measure fetal parameters of a single fetus, and wherein each of the FSDs are configurable to operate using either the FDM mode or the TDM mode. The FMS further configures respective operating modes (i.e., FDM mode or TDM mode) of the FSDs based on the context information and in accordance with a configuration protocol that varies the respective operating modes (i.e., FDM mode or TDM mode) of the FSDs under different operating contexts of the FMS.

A UE, baseband processor, and network device are described. The UE or baseband processor can receive an indication of a configuration of a subband full duplex (SBFD) serving cell. The configuration may identify one or more subcarriers for downlink resources of the SBFD serving cell that are frequency domain multiplexed with one or more subcarriers for uplink resources of the SBFD serving cell. The UE or baseband processor may then receive a cross-link interference (CLI) measurement configuration indicating a set of resources for CLI measurements for the SBFD serving cell. The UE or baseband processor then performs, according to the CLI measurement configuration, the CLI measurements using at least a portion of the downlink resources, and transmits, to the network device serving the SBFD serving cell, a report based at least in part on the performed CLI measurements.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitting device may generate a frequency-domain-multiplexed signal by performing frequency domain multiplexing of a data signal and a reference signal within a symbol of a discrete Fourier transform spread orthogonal frequency domain multiplexing waveform communication, the reference signal being one of a demodulation reference signal, a sounding reference signal, or a channel state information reference signal. The transmitting device may transmit, to a receiving device, the frequency-domain-multiplexed signal. Numerous other aspects are described.

Methods, systems, and devices for wireless communications are described. The techniques described herein relate to a frequency division multiplexing (FDM) of a demodulation reference signal (DMRS). A user equipment (UE) receives control signaling including a configuration for an uplink control message. The UE generates the uplink control message in accordance with the configuration and a first uplink control message format from multiple formats. The uplink control message includes a DMRS that is FDM with uplink control information (UCI). The first uplink control message format is associated with a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) waveform and a quantity of four or more OFDM symbols. The UE transmits the uplink control message using the DFT-s-OFDM waveform.

A joint sensing method for an orthogonal frequency domain multiplexing (OFDM) communication system includes transmitting a plurality of reference signal (RS) resource elements (RE) from a set of staggering comb patterns to a sensing terminal; and determining the plurality of RS resource elements to perform either a full cycle of staggering, a partial cycle of staggering, or a combination of the full cycle and the partial cycle of staggering.

The present invention discloses a frequency domain multiplexing pulse compression method for broadband multi-carrier signals, comprising: performing multi-phase extraction filtering on broadband multi-carrier signals to obtain baseband signals of echo signals; moving each sub-carrier signal to zero frequency, and performing smooth filtering through a designed sliding average filter to output echo data of each sub-carrier; performing a pulse compression on the output of the sliding average filter to obtain a range image of the sub-carrier; performing a sum operation on the sub-carrier range image to obtain a secondary pulse compression result, which is a high-resolution range image of the echo signal. The present invention realizes low resolution of the target by performing a primary pulse compression on the sub-carrier based on sub-carrier separation, and realizes high resolution of the target by performing secondary pulse compression processing on the sub-carrier pulse compression result. The digital pulse compression of the multi-carrier signal is realized by using orthogonal transformation based on multi-phase extraction filtering, CORDIC algorithm, and sliding average filter, and a rough range image and a fine range image of the target can be obtained.

This disclosure provides systems, methods, and apparatus, including computer programs encoded on a computer storage medium, for sidelink control signaling using unlicensed spectrum. A wireless device may perform a listen-before-talk (LET) procedure prior to accessing a channel of the unlicensed spectrum, and may be unable to access the unlicensed spectrum in some cases. In some implementations, a wireless device may additionally transmit control signaling with resources that may be used to transmit sidelink synchronization signal blocks (S-SSBs). For example, a wireless device may multiplex a control signal with an S-SSB, such as frequency domain multiplexing, so that the control signal may be transmitted according to a relaxed LET threshold. In some implementations, the control signal may include information such as an indication of LBT failure or LBT status, or may be used to detect radio link failure (RTF), or may be used for short control signals to synchronize sidelink clusters, among other examples.

In some embodiments, an all-optical Coherent Ising Machine (CIM) may be provided. The all optical CIM may include a fiber optics component configured to enable a frequency domain multiplexing by providing a transmission medium for a plurality of comb lines of a frequency comb mapped into a spin vector; a free space optics component configured to enable a spatial domain multiplexing by spatially separating the plurality of comb lines of the frequency comb; and a spatial light modulator configured to encode a spin-spin interaction matrix and allowing for a vector matrix multiplication, in an optical domain, of the spatially separated plurality of comb lines mapped to the spin vector and the spin-spin interaction matrix, wherein the result of the vector matrix multiplication provides a linear feedback to solve an Ising problem.

Some methods involve receiving, by a control system that is configured for implementing a plurality of renderers, audio data and listening configuration data for a plurality of listening configurations, each listening configuration of the plurality of listening configurations corresponding to a listening position and a listening orientation in an audio environment, and rendering, by each renderer and according to the listening configuration data, the received audio data to obtain a set of renderer-specific loudspeaker feed signals for a corresponding listening configuration. Each renderer may be configured to render the audio data for a different listening configuration. Some such methods may involve decomposing each set of renderer-specific loudspeaker feed signals into a renderer-specific set of frequency bands and combining the renderer-specific frequency bands of each renderer to produce an output set of loudspeaker feed signals.

A physical random access channel transmitting method and apparatus, the method including: a terminal equipment transmits a second number of PRACHs on a first number of valid ROs, the first number of valid ROs being time-domain multiplexed, or the first number of valid ROs being frequency-domain multiplexed, or the first number of valid ROs being time-domain and frequency-domain multiplexed, and the first number and the second number being positive integers greater than or equal to 2.

A joint sensing control method for an orthogonal frequency domain multiplexing (OFDM) communication system includes receiving, from a sensing terminal, a first message or a first set of initiation message; configuring at least a reference signal according to the first message or the first set of initiation message; transmitting the at least a reference signal to the sensing terminal; and adapting a plurality of settings of the at least a reference signal; wherein the first message includes a capability report and the first set of initiation message includes a capability report and a sensing control request.

The present invention discloses a method and device for realizing frequency domain multiplexing in a wireless communication system, wherein the frequency domain resources are divided into a plurality of resource units, each resource unit includes a plurality of subcarriers, and each STA is allocated with at least one resource unit; according to the number of resource units occupied by the STA, the resource allocation of the uplink and downlink transmission channels is indicated in the control channel, and the basic parameters of the system are set according to different subcarrier intervals and bandwidths, and the basic unit of the frequency domain is changed from a subchannel to a subcarrier-level resource unit, so that the granularity of the frequency domain multiplexing is finer, and the frequency domain high multiplexing is realized, and more users are supported at the same time.

Disclosed is a system and method for transmitting more data on the same bandwidth as current wireless and wired schemes use. A method for transmitting data can use orthogonal frequency domain multiplexing by identifying a lowest frequency subcarrier in an orthogonal frequency division multiplexing bandwidth that includes 64 subcarriers. The method can include receiving the second, fourth, eighth, sixteenth, thirty-second, and sixty-fourth subcarriers using a bandpass filter and decoding the set of orthogonal functions for each of the second, fourth, eighth, sixteenth, thirty-second, and sixty-fourth subcarriers. The method can further include combining the decoded data to recover the transmitted data.

Methods, systems, and apparatus for wireless communication are described. The techniques described herein relate to Frequency Division Multiplexing (FDM) of a Demodulation Reference Signal (DMRS). A User Equipment (UE) receives control signaling including configuration for uplink control messages. The UE generates uplink control messages based on the configuration and a first uplink control message format from multiple formats. The uplink control message includes a DMRS in FDM with uplink control information (UCI). The first uplink control message format is associated with a Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform and the number of four or more OFDM symbols. The UE uses the DFT-s-OFDM waveform to transmit the uplink control messages.

A method and apparatus for transmitting a physical random access channel are provided. The method includes a terminal device transmitting a second quantity of PRACH with a first quantity of active RO, wherein the first quantity of active RO is time-domain multiplexed, or the first quantity of active RO is frequency-domain multiplexed, or the first quantity of active RO is time-domain and frequency-domain multiplexed, and the first quantity and the second quantity are positive integers of 2 or more.

Methods, systems, and devices for wireless communications at a user equipment (UE) are described. The UE may receive control signaling indicating a plurality of synchronization signal block (SSB) occasions for a plurality of SSB beams and indicating a plurality of random access occasions. The UE may monitor a first SSB beam of the plurality of SSB beams may monitor a plurality of reference signal beams associated with the first SSB beam, where each beam of the plurality of reference signal beams has a narrower beamwidth than the first SSB beam, and where each beam of the plurality of reference signal beams is quasi co-located and frequency domain multiplexed with the first SSB beam. The UE may transmit a random access message during a first random access occasion, the first random access occasion indicating a first reference signal beam selected from the plurality of reference signal beams.

The invention discloses a three-dimensional imaging method fusing frequency domain multiplexing and a time frame insertion technology. According to the method, two information superposition strategies are combined, so that the three-dimensional imaging time resolution which is several times of the limit frame rate of the camera is realized. According to the method, the frequency domain multiplexing technology is used for carrying out time integration on the to-be-measured object in the single-frame exposure time of the camera to superpose the motion states of the object at multiple moments, then the time frame interpolation technology is combined to carry out interpolation on the motion states at adjacent moments, and dynamic three-dimensional imaging exceeding the frame rate limit of the camera by more than one order of magnitude is achieved. According to the invention, high-speed three-dimensional imaging can be realized through a low-cost low-speed camera system, high measurement precision is maintained, and good expandability and system compatibility are achieved. The method is suitable for various dynamic three-dimensional measurement scenes such as aerospace, intelligent manufacturing, damage experiments and the like, and has wide application prospects and engineering value.

The invention belongs to the technical field of electromagnetic metamaterials and microwave devices, and discloses a nested square ring metasurface-based multifunctional reflection type polarization conversion and wave absorber, which is composed of reflection units, and each reflection unit comprises a metal resonance layer, an intermediate dielectric layer and a metal grounding layer, the metal resonance layer is of a nested annular topological structure with a discontinuous conductive path and comprises an outer ring resonator and an inner ring resonator which are provided with diagonal cut-off gaps, geometric centers of the outer ring resonator and the inner ring resonator coincide, the outer ring resonator and the inner ring resonator are nested with each other, and the outer ring resonator and the inner ring resonator are in a square open ring shape and are provided with diagonal cut-off gaps, four L-shaped metal branches which are symmetrically distributed in a central rotation mode are formed, and meanwhile the inner ring resonator is provided with a blocking gap. And the L-shaped metal branch knot of the inner ring resonator is broken into an unclosed metal line segment. Multi-band and multifunctional electromagnetic wave regulation and control are realized in a single passive structure, and the device has the characteristics of high integration level, high frequency domain reusability and low preparation cost, and has wide application value in radar stealth and wireless communication systems.

The invention belongs to the technical field of optical fiber communication, and particularly discloses a coherent fading suppression method and device based on frequency-space multiplexing. According to the invention, the method comprises the steps: generating a multi-frequency carrier detection optical signal according to a to-be-suppressed optical signal; carrying out parallel sensing on the multi-frequency carrier detection optical signal based on a multi-core optical fiber; generating a multi-channel back scattering signal with multi-frequency components in combination with the target local oscillation optical signal; and carrying out single-channel multi-frequency component combination on the multi-channel back scattering signals, and carrying out spatial domain secondary combination on the combined multi-channel back scattering signals. Through the above mode, a plurality of independent channels are introduced to carry out parallel sensing on injected multi-frequency carrier detection optical signals by adopting an anti-fading mode of collaborative multiplexing of a frequency domain multiplexing strategy and a spatial domain multiplexing strategy, and then multi-channel back scattering signals are merged for multiple times, so that on the basis that the signal fading probability is effectively reduced, the detection precision is improved. The resolution and the detection bandwidth are not sacrificed, and the stability of the overall output of the system is maintained.

A physical random access channel transmission method and apparatus, the method comprising: a terminal device sends a second number of PRACHs on a first number of ROs, the first number of ROs being time-domain multiplexed, or the first number of ROs being frequency-domain multiplexed, or the first number of ROs being time-domain and frequency-domain multiplexed, the first number of ROs being time-domain and frequency-domain multiplexed, or the first number of ROs being time-domain and frequency-domain multiplexed; the first number and the second number are positive integers greater than or equal to 2.

Some methods involve receiving, by a control system that is configured for implementing a plurality of renderers, audio data and listening configuration data for a plurality of listening configurations, each listening configuration of the plurality of listening configurations corresponding to a listening position and a listening orientation in an audio environment, and rendering, by each renderer and according to the listening configuration data, the received audio data to obtain a set of renderer-specific loudspeaker feed signals for a corresponding listening configuration. Each renderer may be configured to render the audio data for a different listening configuration. Some such methods may involve decomposing each set of renderer-specific loudspeaker feed signals into a renderer-specific set of frequency bands and combining the renderer-specific frequency bands of each renderer to produce an output set of loudspeaker feed signals.

Aspects of this disclosure relate to a front end architecture for selectively adding an external carrier aggregation band. A switch element can connect a radio frequency signal path to an antenna path through a frequency domain multiplexer, such as a diplexer, in a first mode. The switch element can connect the radio frequency path to the antenna path and bypass the frequency domain multiplexer in a second mode. The frequency domain multiplexer can be external to a front end module that include the radio frequency signal path. In the first mode, a front end system can support carrier aggregation with a band associated with circuitry implemented external to the front end module.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitting device may generate a frequency-domain-multiplexed signal by performing frequency domain multiplexing of a data signal and a reference signal within a symbol of a discrete Fourier transform spread orthogonal frequency domain multiplexing waveform communication, the reference signal being one of a demodulation reference signal, a sounding reference signal, or a channel state information reference signal. The transmitting device may transmit, to a receiving device, the frequency-domain-multiplexed signal. Numerous other aspects are described.

According to an example aspect of the present disclosure, there is provided a method for transmitting a Discrete Fourier Transform-spread-Orthogonal Frequency Domain Multiplexed. DFT-s-OFDM, signal, the method comprising, converting, by a wireless transmitter, complex-valued symbols to polar domain symbols, wherein the complex-valued symbols are modulated using at least phase shift keying, processing, by the wireless transmitter, angle values of the polar domain symbols to avoid angle differences larger than π rad, or lower than −π rad, between consecutive angle values, interpolating, by the wireless transmitter, at least the processed angle values by an interpolation factor N / L, wherein L is a length of Fast Fourier Transform, FFT, and Nis length of Inverse FFT, IFFT, converting, by the wireless transmitter, the interpolated angle values into complex domain symbols and generating, by the wireless transmitter, a DFT-s-OFDM waveform comprising said complex domain symbols.

Methods, systems, and devices for wireless communications at a user equipment (UE) are described. The UE may receive control signaling indicating a plurality of synchronization signal block (SSB) occasions for a plurality of SSB beams and indicating a plurality of random access occasions. The UE may monitor a first SSB beam of the plurality of SSB beams may monitor a plurality of reference signal beams associated with the first SSB beam, where each beam of the plurality of reference signal beams has a narrower beamwidth than the first SSB beam, and where each beam of the plurality of reference signal beams is quasi co-located and frequency domain multiplexed with the first SSB beam. The UE may transmit a random access message during a first random access occasion, the first random access occasion indicating a first reference signal beam selected from the plurality of reference signal beams.

The application belongs to the technical fields of electromagnetic metamaterials and microwave devices, and discloses a multifunctional reflection-type polarization conversion and wave absorber based on a nested square loop super surface, which is composed of reflection units, each of which comprises a metal resonance layer, an intermediate dielectric layer and a metal ground layer, the metal resonance layer has a nested loop topology structure with a non-continuous conductive path, and comprises an outer loop resonator and an inner loop resonator which are geometrically coincident with each other, are nested with each other, are both square open loop structures and have diagonal cut-off gaps, and form four L-shaped metal branches which are centrally rotationally symmetrically distributed, and the inner loop resonator is provided with a blocking gap, so that the L-shaped metal branches of the inner loop resonator are disconnected into non-closed metal segments. The application realizes multi-band and multifunctional electromagnetic wave regulation and control in a single passive structure, has the characteristics of high integration, strong frequency domain multiplexing and low preparation cost, and has wide application value in radar stealth and wireless communication systems.

The invention provides a joint perception control method of an orthogonal frequency domain multiplexing (OFDM) communication system and user equipment. The method comprises the following steps: receiving a first message or a first group of initialization messages from a sensing terminal; configuring at least one reference signal according to the first message or the first group of initialization messages; sending the at least one reference signal to the sensing terminal; and adjusting a plurality of settings of the at least one reference signal; wherein the first message includes a capability report, and the first set of initialization messages includes a capability report and an awareness control request.

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a transmitting device may generate a frequency domain multiplexed signal by performing frequency domain multiplexing of a data signal and a reference signal within symbols of a discrete Fourier transform extended orthogonal frequency domain multiplexed waveform communication, the reference signal being one of a demodulation reference signal, a sounding reference signal, or a channel state information reference signal. The transmitting device may transmit the frequency domain multiplexed signal to a receiving device. Numerous other aspects are described.

The application discloses a PRS ID configuration method, device and equipment, relates to the technical field of communication, and the method is applied to a configuration management device. The method comprises the following steps: determining the first number of positioning reference signal identifiers (PRS IDs) that can be distributed according to a predefined frame structure and a frequency domain multiplexing factor; determining the first geographical multiplexing range of the PRS IDs according to a PRS detection distance; and configuring RSU PRS IDs and RSU PRS ID sets for RSUs in the first geographical multiplexing range according to the first number, the first geographical multiplexing range and RSU deployment information. The above scheme of the application can ensure that the RSU PRS IDs configured for each RSU in the first geographical multiplexing range are unique and orthogonal, and can reduce the probability of resource collision of a sending end and the complexity of reception of a receiving end.