385 results about "Signal design" patented technology

According to embodiments, a user equipment (UE) using a first radio of the UE receives from a base station one or more configurations. The one or more configurations indicate resources allocated to wakeup signal (WUS) transmission. The UE using a second radio of the UE detects a WUS in the resources while the first radio of the UE is in a sleep power state. The UE using the first radio performs a wakeup procedure with the base station.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive a demodulation reference signal (DMRS) configuration that indicates a code-division multiplexing (CDM) group configured for the UE; receive a first indication of an antenna port, included in the CDM group, assigned to the UE for reception of a first set of DMRS transmissions; receive a second indication of whether a second set of DMRS transmissions for another antenna port, included in the CDM group, is present or absent for another UE; and perform channel estimation based at least in part on the first indication of the antenna port and the second indication of whether the second set of DMRS transmissions for the other antenna port is present or absent. Numerous other aspects are provided.

Aspects presented herein may improve joint communication-radar system by providing a radar reference signal with GI-FMCW waveform. Aspects presented herein may be compatible with communication-centric waveforms and thereby may apply to UEs or network entities with minimal changes if specified. In one aspect, a wireless device transmits a set of communication signals. The wireless device configure one or more parameters associated with a set of radar reference signals for radar sensing based on the set of communication signals, each radar reference signal in the set of radar reference signals including a guard interval. The wireless device transmits the set of radar reference signals associated with the one or more parameters.

A method of low power wake up signal (LP-WUS) procedure includes waking up a main radio of the UE, by a low power wake up receiver (LP-WUR) of a user equipment (UE), using a LP-WUS, wherein a signal design of the LP-WUS comprises a sequence based signal design with a physical broadcast channel (PBCH) and / or a UE specific / UEs group specific based signal design of the LP-WUS.

The invention discloses a communication-detection integrated sonar signal design method and device based on multi-pulse composite modulation, and the method comprises the steps: dividing a total frame period into a detection sub-frame and a communication sub-frame, enabling the detection sub-frame to achieve the high-resolution distance measurement through employing a bidirectional linear frequency modulation (BILFM) signal, a communication sub-frame adopts a multi-frequency multi-phase composite modulation (MTPM) signal to realize high-bit-rate data transmission; after band filtering, orthogonal demodulation, low-pass filtering and down-sampling preprocessing are carried out on detection sub-frame echoes, distance and speed information is extracted by adopting fast-time low-sampling two-dimensional fast Fourier transform (2D-FFT), unambiguous Doppler frequency is recovered by utilizing the Chinese remainder theorem (CRT), and accurate speed measurement of long-distance and high-speed targets is realized; a communication subframe receiving signal is subjected to IQ demodulation after down-conversion, Costas loop carrier synchronization and matched filtering, and multi-frequency multi-phase coded data are extracted. According to the method, the time-frequency collaborative design of detection and communication is realized, the distance resolution and the speed measurement range are considered, and the signal bandwidth utilization rate and the underwater information transmission reliability are remarkably improved while the system complexity is kept low. The device comprises a processor and a memory, and an executable program for implementing the method is stored in the memory. The technology can be widely applied to the fields of unmanned underwater vehicles, ocean monitoring, underwater sensing networks and the like.

The invention relates to the field of network control system security, in particular to an asynchronous processing method for resisting zero dynamic attacks in a non-uniform sampling control system. Comprising the following steps: comparing and analyzing an attacked system and an unattacked system, and establishing a dynamic relation model between an output signal difference value and an attack signal; based on the relation between the zero-dynamic attack signal and the system state space, a zero-dynamic attack signal design strategy which is kept invisible at the non-uniform sampling moment is given; active introduction of a time difference into a controller of the sampling control system is considered, and a dynamic relation between a corresponding attack signal and an output difference value is reconstructed; active introduction of a time difference into a controller of a sampling control system is considered, and a dynamic relation between an output signal difference value containing the time difference and an attack signal is reconstructed; the existence of the time difference is determined by constructing a system containing the time difference and combining with a zero dynamic attack definition; on the basis of the given time difference, the condition for detecting the zero dynamic attack in the non-uniform sampling control system is determined, so that the system is protected; the method is used for enhancing the detection capability and defense effect of the non-uniform sampling control system on the zero dynamic attack.

The present disclosure relates to demodulation reference signal (DMRS) design with code division multiplexing (CDM) group expansion. A network device may be configured to generate a DMRS and send the DMRS to a wireless device. The DMRS may be coded with one of a plurality of expanded orthogonal cover codes (OCCs) belonging to an expanded CDM group. The expanded CDM group may be generated by expanding a legacy CDM group including a plurality of legacy OCCs. The number of frequency domain elements in each of the plurality of expanded OCCs may be expanded as twice the number of frequency domain elements in each of the plurality of legacy OCCs.

The invention provides a distributed optical fiber sensing vehicle signal enhancement method, device and equipment, and the method comprises the steps: carrying out the framing processing of a to-be-processed vehicle signal, and obtaining a time-frequency feature corresponding to the to-be-processed signal; the time-frequency characteristics comprise frequency distribution characteristics and time-domain characteristics; constructing a template signal based on the time-frequency characteristics, and designing a corresponding matched filter by using the template signal to obtain a target filter; the template signal at least comprises a principal component of the time-frequency characteristic; and matching the target filter with the to-be-processed vehicle signal filtered by the band-pass filter to obtain a target vehicle signal. By analyzing the time-frequency characteristics of the to-be-processed vehicle signal, the template signal capable of being matched with the vehicle vibration signal is found, and the template signal is matched with the to-be-processed vehicle signal after band-pass filtering, so that the influence of interference noise on the original vehicle signal is removed, and the enhancement of the vehicle signal under the condition of strong interference noise is realized.

The invention discloses a composite self-adaptive anti-disturbance flow pulsation compensation control method for an electro-hydrostatic actuator. The control method is constructed based on a theoretical flow pulsation representation normal form, a composite self-adaptive rate is fused for processing parameter uncertainty, and two expansion state observers designed based on a position signal and a pressure signal are combined for online estimation. Aiming at the flow pulsation compensation problem of the electro-hydrostatic actuator, the adaptive estimation of unknown parameters of the system can be realized, the uncertain nonlinearity of matching and mismatching can be compensated in real time, and the control performance of the system is improved.

One of the promises of ATSC 3.0 has been the potential for data offload. Separately, advances have been made in hybrid and IP channel rollouts on ATSC 3.0 over the last year. The two have been combined to architect and implement a data offload system. This application explores a practical hybrid delivery model for streaming video services, allowing the distribution of video over CDNs and simultaneously over 3.0, drastically decreasing the bandwidth needs of these CDNs in 3.0 markets, all while integrating into third-party streaming apps to enable seamless streaming with no change to the viewer experience. Topics covered include the methodology for synchronization, encoding needs for the CDN and airchain, signaling design, integration into a streaming application, and the results of the real-world testing of this system.

One or more systems, devices, and / or methods may address signal design for ultra-low power receivers. Transmitter and receiver architectures capable of generating signals and waveforms supporting the operation of ultra-low-power receivers and compatible with OFDM-based signals are disclosed. In some cases, there may be procedures that address one or more of the following: device detection of an on-off keying (OOK) modulated sequence with redundant bits corresponding to OFDM symbols' cyclic prefix; device detection of an OOK modulated sequence with dynamic bit duration corresponding to long and short OFDM symbols; device reception of an OOK modulated DCI / message with redundant bits corresponding to OFDM symbols' cyclic prefix; and / or, device reception of an OOK modulated DCI / message with dynamic bit duration corresponding to long and short OFDM symbols.

The invention belongs to the technical field of quantum information, and particularly relates to a quantum entanglement and classical signal common-fiber transmission device based on a hollow-core optical fiber. According to the device, the characteristics of low loss and weak non-linear effect of the hollow-core optical fiber are utilized, the quantum entanglement two-photon pair and the classical optical signal are transmitted in the hollow-core optical fiber in a co-fiber mode through the wavelength division multiplexing technology and the polarization optimization strategy, the system can tolerate the classical signal with the higher communication rate, and the lower quantum signal bit error rate is allowed. The quantum entanglement and classical signal common-fiber transmission device designed through the method can be widely applied to the fields of quantum key distribution, quantum teleportation, quantum clock synchronization, distributed quantum calculation and the like compatible with a classical optical fiber communication system.

This disclosure provides methods, components, devices and systems for signaling designs for unequal modulation and modulation and coding scheme (MCS) indication. Some aspects more specifically relate to user info field designs to support such an unequal modulation indication and / or an MCS indication, including designs for user info fields of multi-user (MU) physical layer (PHY) protocol data units (PPDUs) and of Trigger frames. In some examples, an access point (AP) may configure a user info field to include at least five bits for MCS signaling, which may enable the AP to uniquely identify an MCS from a set of greater than 16 MCSs. Additionally, or alternatively, the AP may configure a user info field to include a subfield indicative of a pattern of modulation schemes (such as an equal modulation or an unequal modulation) across a set of spatial streams allocated for communication between the AP and a station (STA).

Systems, methods, and instrumentalities are disclosed for synchronization signal burst, signal design, and / or system frame acquisition. A synchronization signal (SS) block or burst can be received. The SS block or burst can include a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and / or a physical broadcast channel (PBCH). A first cell ID can be determined, and / or a plurality of SSS sequences can be generated. An m0 value (e.g., a first cyclic shift) can be determined from a set of m0 values, for example, based on the generated plurality of SSS sequences. An n1 value (e.g., a second cyclic shift) can be determined from a set of n1 values. A second cell ID can be determined based on, for example, the m0 value and the n1 value. A third cell ID can be determined based on, for example, the second cell ID and the first cell ID.

Systems, apparatuses, methods, and computer-readable media are provided for an access point (AP) for a wireless communication system. The AP includes processor circuitry configured to configure a bandwidth part (BWP) for downlink (DL) positioning reference signals (PRS) and a BWP for DL data transmission to a user equipment (UE), wherein the BWP for DL PRS provides DL PRS to the UE for a UE-based positioning operation. The processor circuitry is configured to select an action to be performed by the UE in response to receiving the configured BWP for DL PRS and the configured BWP for DL data transmission by the UE. The AP includes radio front end circuitry that is coupled to the processor circuitry and configured to transmit, to the UE, the configured BWP for DL PRS, the configured BWP for DL data transmission, and the selected action. The wireless communication is a 5G system or a 5G new radio (5G-NR) system.

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE receiving a unified waveform signal from a base station, wherein the unified waveform signal comprises an On-Off Keying (OOK) signal and an Orthogonal Frequency Division Multiplexing (OFDM) signal; determining whether an indicator in the OFDM signal indicates that the unified waveform signal is a low-power wake-up signal (LP-WUS); decoding the LP-WUS when the indicator indicates that the unified waveform signal is the LP-WUS; and terminating a decoding operation when the indicator indicates that the unified waveform signal is not the LP-WUS.

The invention discloses a multi-modal unsupervised cross-domain sleep staging method, which adopts adversarial learning and designs a multi-modal convolution feature extractor module, a domain generalization feature enhancement module and a domain attention module. The method comprises the following steps: firstly, designing a multi-mode convolution feature extractor for physiological signals of two modes of electroencephalogram and electro-oculogram; for the electroencephalogram signals, convolution kernels of different scales are adopted to extract multi-scale features; for the electro-oculogram signal, firstly, the electro-oculogram signal is converted into a two-dimensional frequency spectrum through Fourier transform, and then feature extraction is carried out through two-dimensional convolution, so that unique physiological information of the electro-oculogram signal is fully captured. Thirdly, adaptively adjusting data distribution of a source domain and a target domain by using a domain generalization feature enhancement module, reducing inter-domain differences, and adaptively enhancing high-discrimination-force features; the domain attention module reserves key domain specific features in the adversarial learning process, the classification precision and generalization ability of the model are remarkably improved, and the method shows excellent performance in an unsupervised cross-domain sleep staging task.

The invention discloses a vehicle queue preset time output feedback safety control method and system, and belongs to the field of intelligent network connection multi-vehicle queue control, the control method comprises the following steps: designing a non-linear vehicle queue model, designing a fuzzy observer, combining with a fuzzy logic system to approximate an unknown non-linear function in the vehicle queue model, and calculating the preset time output feedback safety of the vehicle queue. Outputting an estimated displacement, an estimated speed, and an estimated acceleration of the following vehicle; mapping the error transformation of the finite time domain to an infinite time domain to obtain infinite time domain error transformation; designing a Lyapunov function, and performing derivation on the Lyapunov function to finally obtain a following vehicle brake input signal; designing a false data injection FDI attack model for injecting an attack signal into the following vehicle brake input signal to obtain an input with an attack; the invention provides a cooperative control architecture based on a time domain mapping mechanism, and tracking errors under any initial condition can be asymptotically converged to zero within preset time.

Aspects of the present application relate to a state-based sensing signal design. Aspects of the present application also relate to employing the state-based sensing signal design in the context of an integrated communication and sensing system. Using the state-based sensing signal design, a sensing state of a sensing transmitting node may be embedded in the sensing signal. At a sensing receiving node, a received sensing signal may be processed to extract the embedded sensing state of the sensing transmitting node.

This disclosure provides methods, components, devices, and systems for ultra-high reliability (UHR) signaling design. Some aspects more specifically relate to an access point (AP) transmitting a frame including a user info field to a wireless station (STA), where the user info field supports UHR parameters. The user info field may include a subfield indicating a coding scheme for communications, where the subfield includes at least two bits to support at least three coding scheme options. Additionally, or alternatively, the AP may transmit a trigger frame indicating for one or more STAs to communicate via distributed resource units (RUs). The AP may arrange the user info fields in the trigger frame to implicitly indicate respective global cyclic shift delay (CSD) indexes to the STAs. A STA receiving the trigger frame may determine a global CSD index corresponding to the STA according to the order of the user info fields.

The invention provides a liquid leakage detection circuit, a mainboard and a liquid cooling server, and relates to the technical field of liquid cooling server design. The circuit comprises a differential signal generation module, a signal comparison module and a logic judgment module, the differential signal generation module comprises two liquid leakage detection cables, one liquid leakage detection cable is connected to a power supply voltage through a pull-up resistor, the other liquid leakage detection cable is grounded through a pull-down resistor, the two detection cables form a differential wiring pair in a PCB layout, and the signal comparison module is connected with the logic judgment module. The signal generator is used for generating differential detection signal pairs; the input end of the signal comparison module is connected with the detection cables, and the signal comparison module is used for outputting a differential voltage signal corresponding to the impedance change between the two detection cables based on the signal pair; and the logic judgment module is connected with the output end of the signal comparison module and is used for judging whether liquid leakage occurs or not based on the differential voltage signal and a preset threshold voltage signal. By adopting the differential signal design, noise interference can be reduced, and the problem of liquid leakage false alarm caused by noise interference is remarkably improved.

The invention relates to an underwater acoustic communication and positioning integrated signal design and processing method based on FDMA signal modulation, a medium and a device, and belongs to the field of underwater acoustic communication / positioning. And respectively modulating the integrated baseband signals to a plurality of pre-divided carriers with different center frequencies. Each carrier corresponds to an independent transmitter signal, and the center frequency interval of different transmitter signals is greater than the signal bandwidth. And the modulated signal is transmitted to an underwater environment through the underwater acoustic transducer. In the signal processing process, a band-pass filter bank is used for carrying out frequency separation on received signals, each filter corresponds to the center frequency of a transmitting signal, the separated signals are demodulated and decoded to recover original communication data, and the distance between a transmitter and a receiver is calculated by measuring time delay. And simultaneous communication interaction and high-precision positioning of multiple underwater users are realized.

The invention provides a multi-axis mechanical arm model consistency control method based on neighbor event driving, and the method comprises the steps: firstly building a nonlinear multi-mechanical arm system and a dynamic model of a corresponding mechanical arm, which comprises a leader mechanical arm and a plurality of sub-mechanical arms; the sub-mechanical arm obtains state information of a neighbor sub-mechanical arm according to the neighbor relation; when the leader mechanical arm sends out a leader signal, the sub-mechanical arms obtain state information of the leader mechanical arm and state information of the neighbor sub-mechanical arms according to the state information of the sub-mechanical arms and the connection relation between the sub-mechanical arms and the neighbor mechanical arms, and then consistency error signals of the sub-mechanical arms are calculated; and a neighbor event triggering mechanism and a sub-mechanical arm consistency controller are designed, parameters of the sub-mechanical arm consistency controller are adjusted according to the consistency error signal based on the neighbor event triggering mechanism, and a control signal of the sub-mechanical arm is generated. According to the method, the consistency control problem of the multi-agent system can be solved, a neighbor event triggering mechanism is introduced to reduce the communication load, the communication burden of the system is reduced, and the communication efficiency of the system is improved.

The invention discloses an inter-pulse parameter agility-based intra-pulse stepping LFM (Linear Frequency Modulation) signal design and intermittent sampling and forwarding interference resisting processing method, which comprises the following steps of: generating an inter-pulse parameter agility intra-pulse stepping LFM signal, dividing a pulse signal in each pulse repetition interval into M linear frequency modulation sub-pulse signals, the center frequency of each sub-pulse signal has a frequency interval delta f, and the frequency interval delta f among N PRIs in one coherent processing time is agile; a receiving end receives the echo signal subjected to intermittent forwarding interference, and performs down-conversion to convert the echo signal into a baseband signal; the N PRI echo signals are subjected to segmented pulse compression of sub-pulses, the sub-pulses of the interfered frequency band are found out according to the pulse compression result, and the interfered frequency band is filtered and removed; carrying out whole-section pulse compression on the echo signal after interference elimination again; and finally, performing inter-pulse coherent accumulation on the pulse pressure results of the N PRIs. The method solves the problem that the waveform design is relatively single.

The invention belongs to the technical field of waveform design, and particularly relates to a multi-factor adjustment phase function high main lobe and side lobe ratio nonlinear frequency modulation signal design method. The method comprises the following steps: determining a signal parameter; introducing a sequence factor design sequence function according to the signal parameters; introducing a slope factor and an amplitude factor to design a phase function according to the sequence function, and adjusting the sequence factor, the slope factor and the amplitude factor of the phase function according to the criteria of adherence to constant modulus constraint, improvement of main and side lobe ratio after pulse compression and no undersampling to obtain a final phase function; and according to the final phase function, generating a nonlinear frequency modulation signal with a high main-side lobe ratio.

The invention discloses a conduction integrated signal design method and device based on artificial intelligence, and relates to the field of signal processing, and the method comprises the steps: obtaining the frequency spectrum state data of a current electromagnetic environment and the receiving performance data of a broadcasted conduction integrated signal in real time; judging whether the deviation between the current frequency spectrum state data and the frequency spectrum state data obtained at the previous obtaining moment is greater than a preset state deviation threshold value or not and whether the receiving performance data is within a preset performance requirement range or not; if the deviation is not greater than the threshold value and the receiving performance data is within the range, generating a conduction integrated signal by using the current integrated signal parameter; and if the deviation is greater than a threshold value or the receiving performance data is not within the range, determining a conduction integrated signal model, updating integrated signal parameters by using a pre-trained Q value model, and generating a conduction integrated signal by using the updated parameters. According to the invention, it can be ensured that the generated conduction integrated signal is always adaptive to the current electromagnetic environment and has good receiving performance.

The invention belongs to the technical field of radar signal processing and imaging, and particularly relates to a distributed MIMO radar imaging method based on multi-technology fusion, which comprises the following steps: S1, constructing a distributed MIMO radar array: constructing a distributed array consisting of L identical MIMO radar units, each unit comprising M transmitting antennas and N receiving antennas; the multi-radar synchronous imaging method is characterized in that each radar unit adopts an offset frequency orthogonalization design, signals of each radar unit and different transmitting antennas in the same unit are mutually orthogonal in a time domain and a frequency domain by elaborately setting the offset frequency of each transmitting antenna, a virtual array is equivalent to a uniform linear array, and multi-radar synchronous imaging is realized by utilizing a high-precision synchronous control mechanism. According to the method, the equivalent aperture is greatly expanded through cooperative work of the distributed MIMO radar arrays, so that the angular resolution is remarkably improved, the accuracy and reliability of echo signals are guaranteed by adopting a unique orthogonal signal design, and the imaging stability is improved.

This disclosure provides methods, components, devices, and systems for signaling designs for enhanced long range (ELR) transmissions. Some aspects more specifically relate to preamble field designs of ELR physical layer (PHY) protocol data unit (PPDU) formats. In some implementations, a wireless communication device may transmit, via a universal signal (U-SIG) field, a first indication that a PPDU is associated with an ELR format and a second indication of a station (STA) identifier. Additionally, or alternatively, a wireless communication device may transmit, via a set of ELR symbols within a PPDU, an ELR sequence in accordance with a mapping between basic service sets (BSSs) and ELR sequences. Additionally, or alternatively, a wireless communication device may include one or more subfields within an ELR-signal (ELR-SIG) field in accordance with a location of the ELR-SIG field and employ one or more transmission schemes associated with the ELR-SIG field and an ELR-data field.

This disclosure provides methods, components, devices and systems for rate matching and signaling in probability constellation shaping in Wi-Fi systems. Some aspects more specifically relate to a rate matching algorithm and various rules, calculations, procedures, and signaling designs to support rate matching in conjunction with probability constellation shaping. In some examples, a wireless communication device functioning as a transmitter device may implement a rate matching algorithm to determine a pre-forward error correction (FEC) padding boundary, a pre-FEC padding size, a quantity of codewords, and a post-FEC padding size given a presumed payload size after shaping, a codeword size, and an effective code rate. Additionally, or alternatively, a wireless communication device may indicate information associated with an application of a constellation shaping. Such information may indicate a specific constellation shaping combination or whether constellation shaping is set to an ON or OFF sets, or both.

This disclosure provides methods, components, devices, and systems for ultra-high reliability (UHR) signaling design. Some aspects more specifically relate to an access point (AP) transmitting a frame including a user info field to a wireless station (STA), where the user info field supports UHR parameters. The user info field may include a subfield indicating a coding scheme for communications, where the subfield includes at least two bits to support at least three coding scheme options. Additionally, or alternatively, the AP may transmit a trigger frame indicating for one or more STAs to communicate via distributed resource units (RUs). The AP may arrange the user info fields in the trigger frame to implicitly indicate respective global cyclic shift delay (CSD) indexes to the STAs. A STA receiving the trigger frame may determine a global CSD index corresponding to the STA according to the order of the user info fields.