548 results about "Spatial filter" patented technology

The invention discloses a special environment laser radar system and method based on polarization modulation and laser coding. The laser radar system comprises a polarization modulation laser emitting unit, a multi-channel receiving unit and a compressed sensing reconstruction unit. The polarization modulation laser emission unit comprises a laser, a beam expanding module, a spatial light modulator, a micro galvanometer array, a spatial filter and a first focusing lens which are arranged in sequence; the multi-channel receiving unit comprises a second focusing lens, a polarization beam splitter and a single-pixel detector array which are arranged in sequence; and the compressed sensing reconstruction unit comprises a compressed sensing processing module, an image reconstruction module and a loop adaptive control module which are arranged in sequence. The anti-interference capability in a complex environment is enhanced through polarization modulation, the detection resolution and the signal-to-noise ratio are improved in combination with laser coding, the imaging quality and stability of the laser radar in a special environment are greatly improved, and the method can be widely applied to the fields of military reconnaissance, disaster rescue, unmanned driving and the like.

Methods and apparatuses for power control and beam management to enable coexistence of radar sensing and wireless communication. A method for a UE includes determining a sensing category or characteristics for a sensing application, and selecting a spatial filter for radar sensing transmission or reception based on determined sensing category or characteristics. The method further includes identifying a radar sensing transmission power and transmitting or receiving radar sensing signals using the spatial filter and the identified radar sensing transmission power. The method further includes reporting one of communication blockage, radar sensing beam information, or CSI adapted to the radar sensing beam information to a base station or neighboring UEs.

There is provided a method performed by a network node for configuring dynamic behavior of a spatial filter of a repeater node. The method comprises configuring the repeater node with one or more higher layer parameters. The one or more higher layer parameters define one or more beam time states. The method further comprises sending a dynamic indication to the repeater node indicating a beam and an associated beam time state. There is further provided a method performed by a repeater node. The method comprises receiving signaling, from a network node, configuring the repeater node with one or more higher layer parameters. The one or more higher layer parameters define one or more beam time states. The method further comprises receiving, from the network node, a dynamic indication indicating a beam and an associated beam time state.

Methods and apparatuses for radio frequency exposure mitigation via beam selection for random access procedure. A method for performing a random access (RA) procedure includes receiving information for a set of downlink reference signals (DL RSs). The method further includes determining: a set of DL reference signal received powers (RSRPs) corresponding to the set of DL RSs, a set of spatial filters corresponding to the set of DL RSs, a set of exposure levels corresponding to the set of spatial filters, a first DL RS from the set of DL RSs based on the set of DL RSRPs and the set of exposure levels, and a first spatial filter corresponding to the first DL RS. The method further includes transmitting a physical random access channel (PRACH), a physical uplink shared channel (PUSCH), or a physical uplink control channel (PUCCH) using the first spatial filter.

The invention discloses a phased array computing terminal real-time beam forming and interference reduction method, which comprises the following steps of: 1, acquiring an observation signal by an observation target, calculating an independent narrow-band beam former for each sub-band channel for a channelized frequency domain baseband signal, and further realizing frequency domain real-time beam forming on all baseband signals at the same time, based on the dynamic change of the propagation environment, the beam forming weight is updated, the beam shape and direction are adjusted, and the maximum signal-to-noise ratio beam forming is realized; and 2, effective interference reduction is realized by adopting spatial filtering in phased array calculation terminal equipment, a spatial filter is constructed in combination with a subspace projection method, identification and elimination of interference signals are realized through calculation and characteristic decomposition of a covariance matrix, and finally filtered signal data are obtained. According to the method, a large number of independent tasks in matrix operation can be efficiently processed, so that the calculation time is remarkably shortened, and the observation capability of a system and the adaptability of an application scene are improved.

Devices, methods, and systems for coverage extension. A bundle of repeated transmissions of a preamble are transmitted responsive to a reference signal received power (RSRP) being less than a threshold and a random access (RA) procedure being initiated. A random access response (RAR) window is monitored for a random access radio network temporary identity (RA-RNTI) corresponding to the repeated transmissions of the preamble. In some implementations, each of the repeated transmissions of the preamble is transmitted based on a spatial filter that is different from others of the repeated transmissions of the preamble. In some implementations, each of the repeated transmissions of the preamble comprises a preamble index that is different from preamble indices of others of the repeated transmissions of the preamble. In some implementations, the spatial filter comprises a transmission (Tx) beam. In some implementations, the bundle of repeated transmissions of the preamble comprises retransmissions of a msg1.

The invention relates to a method for reducing the effects of noise suppression on the measurement of the phases of satellite navigation signals at the point of their reception, wherein, in the method, a one-dimensional or multi-dimensional antenna array is provided with multiple reception antennas, satellite navigation signals received by the reception antennas are processed in a signal processing unit, the received satellite navigation signals undergo noise suppression in the signal processing unit by means of a spatial filter, i.e., by means of spatial filtering, for example by a power inversion (PI) filter or a projection filter, and after the noise suppression by means of the signal processing unit, the carrier phase of at least one or each satellite navigation signal is determined and is corrected by calculating parameters of one or more eigenbeamformers.

Here provides a system, apparatus, and method(s) for processing images based on colour constancy. The method comprises obtaining an image in a first colour space; converting the image to data in a second colour space; transforming the data using chromatic adaptation; performing a first normalisation on the transformed data, where the first normalisation comprises applying a dynamic spatial filtering technique to adjust the transformed data based on light intensity; applying a set of filters to the normalised data, where the set of filters is convoluted based on the normalised data in relation to the image; performing a second normalisation on the filtered data to obtain an illumination estimation of the image in relation to the filtered data; and outputting the normalised data from the second normalisation, where the normalised data maintains colour constancy based on the illumination estimation, removing the illumination from the normalised data.

Methods and devices of a wireless system are provided. A user equipment (UE) receives a first configuration defining a first set of time domain resources for radar sensing. The first configuration includes at least one of a frame structure comprising radar sensing slots or a slot structure comprising radar sensing symbols. The UE performs radar sensing within the first set of time domain resources and first frequency domain resources. The first set of time domain resources at least partially overlap time domain resources for communication based on one or more different beams, spatial filters, or spatial angles. The first frequency domain resources at least partially overlap second frequency domain resources for communication based on one or more different beams, spatial filters, or spatial angles.

A method performed by a network node in a wireless network is provided for configuring periodic behavior of a repeater beam of a repeater node. The method comprises indicating, to the repeater node, a beam to use and indicating, to the repeater node, a beam time-domain state associated with the indicated beam. There is further provided a method in a repeater node. The method comprises receiving an indication, from the network node, of a beam to use and receiving an indication, from the network node, of a beam time-domain state associated with the indicated beam.

The invention provides a supervised domain adaptive cross-subject migration method oriented to SSVEP-BCI, and solves the problems that in the prior art, a brain-computer interface is poor in usability, and the migration effect is not ideal when the difference between a source domain and a target domain is too large. The implementation steps are as follows: generating a phase-locked time-shifting data set; calculating a time filter; generating an extended training set; calculating an intra-domain invariant spatial filter and a template signal; calculating an inter-domain invariant spatial filter and a template signal; calculating a domain adaptation conversion matrix; and calculating a combined correlation coefficient identification target. According to the method, the effect of multiple collection can be achieved only through a small amount of collected data, the time structure information of the SSVEP signal can be captured, the defect that visual fatigue is caused by a large amount of calibration work when a new user uses a brain-computer interface is overcome, the usability of the brain-computer interface is improved, and the method can be applied to a spelling system.

A method can include transmitting, by a wireless device and for a beam failure recovery (BFR) of a cell, a random access preamble with multiple spatial filters. The method can also include receiving a message corresponding to the random access preamble. The message indicates a spatial filter of the multiple spatial filters. The method can further include transmitting, after a number of symbols from completion of the BFR, an uplink signal with the spatial filter indicated by the message.

Methods and apparatuses for indicating uplink (UL) beams and sounding reference signal (SRS) resources. A method performed by a user equipment (UE) includes receiving, in a downlink control information (DCI) format, (i) a SRS resource indicator (SRI) and (ii) a transmission configuration indication (TCI) codepoint mapped to one or more first TCI states and determining, based on the SRI, a SRS resource and a physical uplink shared channel (PUSCH) associated with the SRS resource. The method further includes determining, based on the one or more first TCI states, a spatial filter for transmitting the PUSCH; and transmitting the PUSCH using the determined spatial filter.

Disclosed in the present application is a low-training-cost electroencephalogram feature decoding method for a steady-state visual evoked potential. The method comprises: collecting original steady-state visual evoked potential signals of a subject as training data; using filter banks to preprocess original steady-state visual evoked potentials Xn, so as to obtain preprocessed steady-state visual evoked potentials Xn (m); dividing the preprocessed steady-state visual evoked potentials Xn (m) into Pn sub-periods (I); on the basis of (I), obtaining spatial filters (II) of m-th sub-bands; integrating the spatial filters (II) to obtain an integrated spatial filter (III); averaging (IV) to obtain (V); copying and connecting a plurality of (V), and performing synthesis to obtain a steady-state visual evoked potential template signal (VI) having a required length; and identifying an unknown steady-state visual evoked potential K by means of the integrated spatial filter (III) and the steady-state visual evoked potential template signal (VI).

Methods and apparatuses for beam indication with a downlink (DL)-related downlink control information (DCI) format in a wireless communication system. A method of operating a user equipment (UE) includes receiving configuration information for a list of transmission configuration indication (TCI) states; receiving TCI state code points activated via a medium access control-control element (MAC CE); and receiving a downlink control information (DCI) format indicating at least one of the activated TCI state code points. The DCI format does not include a downlink (DL) assignment and includes fields set to a bit pattern. The method further includes determining a TCI state to apply based on the at least one indicated TCI state code point; updating, based on the determined TCI state, quasi-co-location (QCL) assumption or spatial filters; and at least one of receiving based on the updated QCL assumption and transmitting based on the updated spatial filters.

This flow cytometer includes a flow path through which an observation object flows with a fluid; an optical illumination system including a spatial optical modulation device, and a first optical element; and an optical detection system including a first light detector, wherein the optical illumination system further includes a first spatial filter disposed in a first optical path between a light source and an image position of light imaged in the flow path by the first optical element and having a first region which hinders traveling of light emitted from the light source towards the observation object, the optical detection system further includes a second light detector disposed in a second optical path between the first light detector and the image position and having a second region which directs the light modulated by the observation object towards the first light detector, and the position of the first region and the position of the second region are in a substantially optically conjugate relationship.

The embodiment of the invention discloses an image defect detection method and device and a storage medium, which are used for detecting screen defects and improving the defect detection rate. The method comprises the following steps: acquiring a first image and a second image according to different light sources and light source positions of a camera, and calculating a first image mean value; calculating a correction coefficient matrix according to the first image, the second image and the first image mean value; determining a coordinate position of dust and a coordinate position of a noisy point in the first image; adjusting a correction coefficient matrix according to the coordinate position of the dust and the coordinate position of the noise point, and correcting the first image through the adjusted correction coefficient matrix; obtaining a fitting edge of the display screen in the first image, and calculating through a homography matrix to obtain a third image; performing convolution operation according to the adaptive spatial filtering kernel matrix and the third image; performing threshold value control on the third image after the convolution operation is completed, and screening out a fourth image; and performing characteristic value analysis on the fourth image to obtain defect characteristics.

The invention relates to a quantum computer, which comprises a sample (21) with paramagnetic centres, preferably in the form of NV centres (22), and a pumping radiation source (1). The pumping radiation source (1) irradiates, by means of an optical system, the paramagnetic centres and / or NV centres (22) with pumping radiation (54) of a pumping radiation wavelength (λpmp) over a first optical partial path. The optical system detects the fluorescent radiation (33) of the paramagnetic centres (22) and guides the fluorescent radiation (33) to a photodetector (50) and / or a single-photon detector (50) over a second optical partial path. The first optical partial path differs from the second optical partial path at least in some portions. The photodetector (50) and / or the single-photon detector (50) convert the fluorescent signal of the fluorescent radiation (33) of the paramagnetic centres (22) into at least one measurement signal and / or at least one measurement value. The quantum computer uses this at least one measurement signal and / or this at least one measurement value to carry out a quantum operation. The device is characterised in that the quantum computer has an optical spatial filter in the second optical partial path.

Snapshot phase-shifting diffraction modules and associated systems and methods are described that enable high spatial and temporal resolution phase imaging with high immunity to environmental factors such as vibrations and temperature changes. One example optical diffraction phase module includes a polarization grating to produce two circularly polarized light beams with opposite polarizations, a first lens to receive the two circularly polarized beams, and a spatial filter positioned at a focal plane of the first lens. The spatial filter includes two openings, one to spatially filter one of the two circularly polarized light beams, and another opening to allow another circularly polarized light beam to pass. The module also includes a second lens to focus the received light onto an image plane and to enable a phase measurement based a plurality of interferograms. The phase module can be incorporated into a microscope system that operates a reflection or a transmission mode.

Methods and apparatuses for fast beam indication. A method of operating a UE includes receiving a number (M) of transmission configuration indicator (TCI)state code points activated by a medium access control element (MAC CE) and, if the UE is configured to be indicated TCI state code points on DL control information (DCI) and M>1, receiving the DCI that indicates at least one TCI state code point from the M TCI state code points and determining a TCI state to apply to at least one of downlink (DL) channels and uplink (UL) channels. The method further includes updating one or more spatial filters for at least one of the DL channels and the UL channels based on the determined TCI state and at least one of receiving and transmitting the DL channels and the UL channels, respectively, based on the updated one or more spatial filters.

The invention discloses a bridge expansion joint acoustic monitoring method based on a beam forming microphone array, and the method comprises the steps: synchronously collecting acoustic signals through multiple channels, and achieving the high-precision signal alignment through clock offset compensation; the noise analysis module is started by combining a pre-triggering signal of a vehicle passing through the detection unit, the optimal microphone distance is dynamically determined according to sound field coherence and a signal-to-noise ratio maximization model, and a stepping motor drives a movable microphone to achieve real-time adjustment. On the basis, a spatial filtering weight is generated by adopting a self-adaptive beam forming algorithm, and directional enhancement and interference suppression of the expansion joint sound source are realized. Through collaborative optimization of a hardware structure and a signal processing method, the sensitivity and accuracy of acoustic monitoring of the bridge expansion joint are effectively improved, the abnormal sound source recognition capability can be remarkably enhanced, the environmental noise interference is reduced, and the method is suitable for intelligent monitoring and diagnosis of the long-term service state of the bridge expansion joint.

A system includes an imaging system, a spatial filter, and a detector. The system is configured to receive a plurality of diffraction orders. The spatial filter is configured to block one or more undesired diffraction orders of the plurality of diffraction orders and to pass one or more desired diffraction orders of the plurality of diffraction orders. The spatial filter includes one or more obscurations having an angular dependent radius that varies azimuthally. The detector is configured to receive and measure an intensity of the one or more desired diffraction orders. The spatial filter is motorized.

The described techniques enable repeated physical random access channel (PRACH) preamble transmissions across multiple random access occasions (ROs) using a same spatial filter. A user equipment (UE) may transmit a PRACH preamble across multiple ROs, where each RO is associated with a same synchronization signal block (SSB) or channel state information reference signal (CSI-RS). In such cases, the PRACH repetitions may be transmitted in ROs in accordance with a mapping rule: first, in increasing order of frequency resource index; second, in increasing order of a time resource index; third, in increasing order of PRACH slot indices; and fourth, in increasing order of PRACH association period indices. Additionally, or alternatively, the PRACH repetitions may be transmitted in ROs in accordance with a mapping rule: first, in increasing order of time resource index; second, in increasing order of PRACH slot indices; and third, in increasing order of PRACH association period indices.

Apparatuses and methods for indication for inter-cell beam management in a wireless communication system. A method of operating a user equipment (UE) includes receiving configuration information for a list of transmission configuration indication (TCI) states, receiving TCI state code points activated by a medium access control-control element (MAC CE), and receiving DL control information (DCI) indicating at least one of the activated TCI state code points. The method further includes determining a TCI state to apply to at least one of downlink (DL) channels and uplink (UL) channels within at least one entity; updating one or more spatial filters for at least one of the DL channels and the UL channels based on the determined TCI state; and receiving and transmitting the DL channels and the UL channels of the at least one entity, respectively, based on the updated one or more spatial filters.

The invention provides a hydraulic power plant medium leakage identification method and system, and relates to the technical field of hydropower leakage identification, and the method comprises the steps: deploying a high-definition video monitoring device and an operation state sensor module, carrying out the synchronous registration, configuring infrared channel enhancement and polarized light interference suppression, and carrying out the spatial filtering noise reduction and adaptive adjustment; and configuring a multi-modal enhanced input tensor. High-definition video monitoring equipment and an operation state sensor module are deployed in an operation area of a hydraulic power plant, and technologies of infrared channel enhancement, polarized light interference suppression, spatial filtering noise reduction and the like are combined, so that a multi-mode enhanced input tensor is constructed; according to the method, a clear leakage area identification effect can still be kept in a night low-illumination environment, water vapor and fog interference and metal reflection conditions, so that the problem that the identification precision is reduced due to the fact that the prior art depends on single-mode input is effectively solved, and stable distinguishing of oil medium leakage and water medium leakage is achieved.

Provided in the embodiments of the present application are a wireless communication method and devices. The method comprises: on the basis of a measurement result corresponding to a first monitoring signal set or a confidence coefficient corresponding to spatial filters predicted in a first prediction data set, a first communication device monitors the prediction performance of a first network model.

The invention provides a spectrum confocal measurement system based on transverse coding and a measurement method thereof, and belongs to the technical field of optical detection. The spectrum confocal measurement system based on transverse coding comprises a spectrum position measurement unit and a spectrum angle measurement unit, and a dispersion adjustment assembly, a spatial filtering assembly and a spectrum receiving device are added in an existing confocal measurement system. Through a transverse coding technology, a spatial filtering technology and a spectrum positioning technology of a spectrum, position measurement and angle measurement of a to-be-measured point are accurately completed by using a one-dimensional spectrum wavelength, and the problems that in an existing confocal measurement technology, measurement is carried out through light spots; and when the shape of the received light spot changes, the brightness is not uniform, the light spot energy is weak or the interference factor is too large, the accurate measurement cannot be carried out.

The invention discloses an electroencephalogram signal analysis method, and relates to the technical field of electroencephalogram signal processing. The method comprises the following steps: collecting and preprocessing a multi-channel electroencephalogram signal; establishing a spatial filter, and separating and storing task-related signals and task-independent signals from the signals; constructing an auxiliary classifier to generate an adversarial network, training an auxiliary classifier by using the task-independent signal to judge whether task-independent noise is mixed in an artificial signal generated by a generator, and applying punishment to the generator, so as to generate a high-quality and high-fidelity task-related artificial electroencephalogram signal; and jointly inputting the generated signal and the original signal into a CNN-LSTM-Attention hybrid model for training to obtain a final spatial filtering and intention recognition model. According to the method, the problem of model performance bottleneck caused by insufficient individual training data in a steady-state visual evoked potential brain-computer interface system is effectively solved, the accuracy and robustness of patient intention recognition are remarkably improved, and meanwhile, the calibration burden of a user is relieved.

The present disclosure relates to methods and apparatuses suitable for an uplink beamforming framework for advanced radio technologies such as 5G. The method performed by a UE comprises: receiving (2001), from a network node, via a higher layer, a configuration of an Information element (IE) comprising a set of parameters used for the configuration of an UL beam direction or a spatial filter to be used in a UL transmission; wherein the IE contains at least: an ID unique to each IE and an ID of an UL reference signal, RS resource or a DL RS resource; and applying (2002) the UL beam direction or spatial filter IE for the transmission of one or more of the PUSCH, PUCCH resource(s) and / or Sounding Reference Signal, SRS resource(s).

The described techniques enable repeated physical random access channel (PRACH) preamble transmissions across multiple random access occasions (ROs) using a same spatial filter. A user equipment (UE) may transmit a PRACH preamble across multiple ROs, where each RO is associated with a same synchronization signal block (SSB) or channel state information reference signal (CSI-RS). The PRACH repetitions may be transmitted in ROs in accordance with a first mapping rule: first, in increasing order of frequency resource index; second, in increasing order of a time resource index; third, in increasing order of PRACH slot indices; and fourth, in increasing order of PRACH association period indices. Additionally, or alternatively, the PRACH repetitions may be transmitted in ROs in accordance with a second mapping rule: first, in increasing order of time resource index; second, in increasing order of PRACH slot indices; and third, in increasing order of PRACH association period indices.