18 results about "Frequency domain multiplexing" patented technology

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.

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.

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 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.

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.

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.

The invention relates to a frequency division multi-beam phase control receiver, and belongs to the technical field of wireless communication. The receiver comprises antenna channels and a power combiner, each antenna channel corresponds to a phased-array antenna unit, radio-frequency signals received by the antenna units are filtered, after out-of-band noise and interference components are filtered out, the radio-frequency signals are multiplied by time discrete signals corresponding to preset discrete frequency spectrums to be modulated to different frequency points, and the frequency spectrums are modulated to different frequency points. The amplitude and the phase of each frequency point correspond to the amplitude and the phase of the discrete spectrum; and the power combiner synthesizes the beam signals of different frequency points so as to obtain a frequency division multi-beam signal. According to the invention, a plurality of signals from different directions are moved to different frequencies, the spatial multiplexing and frequency domain multiplexing capabilities of the phased array are improved, the number of amplitude-phase channels in the multi-beam phased array is reduced, the complexity of a power division network is reduced, the cost is low, the capacity is high, and the like. The front-end receiver architecture can be used as a front-end receiver architecture in a multi-beam phased array system and an anti-interference navigation system.

Apparatuses, methods, and systems are disclosed for configuring a reference signal corresponding to a waveform type. One method includes receiving, at a user equipment from a network device, first configuration information indicating a first physical channel with a first waveform type. The method includes receiving, from a network device, second configuration information indicating a first reference signal with the first waveform type. The method includes determining whether a frequency domain multiplexing pattern with combs, frequency domain orthogonal cover code, or a combination thereof is supported for transmission of the first reference signal with the first waveform type.