153 results about "Signal design" patented technology

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.

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.

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.

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.

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 relates to the technical field of smart power grids, in particular to a detection signal design method and device for multi-injection-point and multi-load-node identification, and the method comprises the steps: calculating the static sensitivity of a plurality of to-be-identified load nodes corresponding to each target equipment injection node in a plurality of target equipment injection nodes based on steady-state operation data, establishing a detection signal optimization model taking a reactive detection signal as a decision variable by taking the total minimum load model parameter identification error of a plurality of to-be-identified load nodes as a target and combining static sensitivity, and introducing reactive energy constraints and signal structure constraints of a plurality of target equipment injection nodes and solving; generating an optimal reactive power detection signal waveform of each target equipment injection node, performing evaluation by using a target evaluation index, when an evaluation result meets a preset constraint condition, injecting the optimal reactive power detection signal waveform into the system, and after a response is generated, performing identification on a load model parameter by using the response, and obtaining an identification result of each load node to be identified.

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.

This invention relates to the field of industrial equipment fault diagnosis, and provides a self-supervised multi-sensor fault diagnosis method and system based on semantic embedding. The method preprocesses raw normal operating condition monitoring data, generates a fault window through single-channel fault injection using temporal semantic embedding, and generates a supervision signal for the fault window. Features are extracted from the training sample window composed of the pure normal operating condition window and the fault window using long-term Transformer branches and short-term CNN branches. The extracted long-term and short-term features are concatenated and mapped to a shared fault feature representation. A fault attribute matrix is ​​constructed, a semantic prototype library is generated, and semantic similarity is calculated. Based on the shared fault feature representation and semantic similarity, a multi-task prediction head is constructed. Based on the multi-task prediction head and the supervision signal, a multi-task loss function is designed to train an end-to-end fault diagnosis model. Post-processing optimization is combined to correct easily misjudged fault results. Online fault diagnosis results are output.

The application provides a kind of intelligent metasurface assisted near-field time division integrated sensing method and system, it is related to wireless communication field.The application designs integrated sensing system by introducing RIS and single antenna receiver, avoids complex full-duplex base station and multi-antenna receiver, significantly reduces hardware complexity and implementation cost under the premise of ensuring high-quality communication and sensing performance;The adjustable frame structure designed separates the communication subframe and the sensing subframe completely, decouples the communication beam optimization and the sensing signal design, respectively realizes the communication and sensing functions in a purer signal environment;In the communication subframe, the communication and rate maximization are realized, and in the sensing subframe, the sensing capability is enhanced through the transmission beam pattern matching, which significantly improves the overall communication rate and sensing accuracy of the system;Finally, a virtual multi-dimensional receiving signal of multiple passive targets in the near field of RIS is constructed through repetition coding design, and then the 2D-MUSIC algorithm is used to estimate the target angle and distance parameters.

The invention discloses a train positioning method and system based on abnormal signal detection, and the method comprises the following steps: an auxiliary base station obtains a train credibility signal, designs a hierarchical local factor algorithm, calculates a local factor and a joint density factor, and obtains a train high-quality credibility signal; carrying out secondary detection on the train high-quality credibility signal by utilizing a mean value clustering algorithm; designing a boundary test algorithm, calculating a boundary coefficient, judging whether the satellite signals are abnormal or not, calculating the train position according to the train positioning signals corresponding to all the healthy satellite signals, the positioning of the train inertial navigation unit and the positioning of the auxiliary base station, and outputting the train position. According to the method, by obtaining the satellite signals and designing the hierarchical local factor algorithm and the mean value clustering algorithm, multi-dimensional and deep detection of the train positioning signals is achieved, the accuracy of abnormal signal recognition is remarkably improved, the train position is corrected through the multiple positioning signals, and the positioning accuracy of the train in the interference environment is further improved.

The invention provides a distributed radar-oriented low-interception probing integrated signal design method and system, and relates to the field of wireless communication and radars, and the method comprises the steps: obtaining first information and second information; performing distributed node emission signal modeling according to the first information and the second information to obtain a signal expression of each emission node; illegal reconnaissance interception receiving signal modeling is carried out according to the signal expression, and a total signal model received by an interception machine is obtained; performing low interception performance optimization target design according to the total signal model to obtain an optimization target function; constructing a distributed low-interception probing integrated signal design model according to the optimization objective function to obtain a joint optimization problem model; and performing optimization solution according to the joint optimization problem model to obtain a low-interception probing integrated signal. According to the invention, the anti-interception and anti-eavesdropping capabilities of the distributed co-detection system are improved, and balanced optimization of detection, communication and safety performance is realized.

This disclosure provides methods, components, devices and systems for interference mitigation (IM) mode signaling designs for a physical layer protocol data unit (PPDU). Some aspects relate to IM mode signaling designs according to which a wireless communication device determines a tone plan in accordance with an ON or OFF state of the IM mode. For example, an ON state of the IM mode may correspond to a first tone plan and an OFF state of the IM mode may correspond to a second tone plan. The first tone plan may define first fixed pilot tone locations, with pilot tones at the first fixed pilot tone locations being usable as IM pilot tones and / or usable as carrier frequency offset (CFO) pilot tones. The second tone plan may define second fixed pilot tone locations, with pilot tones at the second fixed pilot tone locations being exclusively usable as CFO pilot tones.

Example implementations include a wireless communication method of selecting, by a wireless communication device, N resources, where N is equal to or larger than 1; and sending, by the wireless communication device to a wireless communication node, a message including a Channel State Information (CSI) report, where the CSI report includes an index of each of the N resources, and quality information of each of the N resources, where each of the N resources includes a reference signal resource, and where each of the N resources corresponds to one of M elements, M being smaller than or equal to N.

A system may comprise hardware and software configured to perform computing functions that mimic at least one computing function of a human brain, wherein the hardware and software comprises: analog circuitry configured to perform signal processing of neural signals obtained from living brain tissue using at least one sensor, a computer system comprising a processor, memory accessible by the processor, and computer program instructions stored in the memory and executable by the processor digital circuitry and software configured to process the obtained neural signals to generate a representation of a brain function from the obtained neural signals, and to generate parameters for use by analog and digital circuitry to perform computing functions that mimic at least one computing function of a human brain, and the analog and digital circuitry configured to use the generated parameters to perform computing functions that mimic at least one computing function of a human brain.

The invention discloses a permanent magnet synchronous motor full-order active-disturbance-rejection control method based on a disturbance differential predictor, and aims to solve the problem of disturbance compensation lag of traditional active-disturbance-rejection control. Comprising the following steps: establishing a d-q coordinate system mathematical model of the permanent magnet synchronous motor and defining total disturbance; designing a full-order expansion state observer, inputting the converted current, voltage and mechanical angular velocity, and outputting a system state variable and a total disturbance observation value; inputting the total disturbance observation value into an original disturbance differential estimator, and outputting a total disturbance first-order differential estimation signal through backward differential discretization; combining the current tracking error, the total disturbance observation value and the differential estimation signal to design a linear state error feedback control law, and generating a control voltage; a rotating speed-current double closed loop is constructed, and inverter driving signals are generated through inverse transformation and SVPWM to drive a motor. According to the invention, the conversion from feedback compensation to feed-forward suppression is realized, the compensation lag is solved, the dynamic performance and robustness are improved, and the structure is clear and easy to realize.

The application discloses a kind of detection communication integrated collision avoidance sonar signal design method and device, its method includes: modulating continuous frequency phase shift keying signal CFPSK, generates initial frequency and Chirp signal;Modulate continuous frequency phase shift keying signal, BPSK signal is modulated to Chirp by phase modulation two-way, then two-way signal is added, obtains final transmitting signal;After CFPSK signal is pulse width modulated, it is emitted by the transducer of collision avoidance sonar;Collecting collision avoidance sonar original echo signal, obtains original echo data;Original data collected is preprocessed, and two-way signal of virtual and real is obtained;Signal is compressed into short pulse bandwidth signal, generates the impulse response parameter of two groups of matched filters, each group is matched with virtual and real two-way signal to obtain four groups of matching results, and the final matching output is obtained from real number field to complex number field;The starting point of CFPSK signal is determined by detecting the peak position of matched filter output, and echo signal is accurately intercepted from received signal for communication decoding, and coherent detection is carried out on received signal and reference carrier.The application realizes the cooperative work of detection and communication function.

A method of simulating a mixed-signal circuit design, includes, dividing a first circuit disposed in a first level of hierarchy of the circuit design into a multitude of subcircuits. At least a first subcircuit processes an electrical signal, and at a least a second subcircuit processes an optical signal; adding one or more input / output terminals to the first subcircuit to transform the subcircuit into a first subblock; adding one or more input / output terminals to the second subcircuit to transform the second subcircuit into a second subblock; replacing an instance of the first circuit design in a second level of hierarchy of the mixed-signal design with the first and second subblocks; simulating the first subblock in each of the first and second levels of the hierarchy using an electrical circuit simulator; and simulating the second subblock in each of the first and second levels of the hierarchy using an optical simulator.

The present invention belongs to the fields of integrated sensing and communication architectures and digital signal processing. Provided is a working method for a symbiotic sensing and communication system. The method comprises: on the basis of a symbiotic sensing and communication system, establishing a communication signal transmission model; executing received communication signal processing at a communication user; establishing a sensing signal model in the symbiotic sensing and communication system; executing sensing echo signal processing at a sensing node, and while an integrated sensing and communication signal is used for providing a communication service to an Internet-of-Vehicles user, the sensing node realizing, on the basis of sensing echo signals, the sensing of the communication user and a sensing target using dimension-reduced maximum likelihood estimation; and feeding back to a base station a sensing result obtained by the sensing node, so as to assist in realizing the design of a downlink integrated sensing and communication signal for a subsequent moment. The present invention can effectively avoid the problem of degradation of the sensing performance caused by self-interference, and significantly reduce hardware costs and energy consumption.

An optical transmitting system for distance measuring includes a signal generator, a laser diode coupled to the signal generator, and an optics device. The signal generator is configured to generate a first plurality of electrical signals. The laser diode is configured to generate a first plurality of optical waveforms that correspond with the first plurality of electrical signals. The optics device is configured to receive the first plurality of optical waveforms and direct the first plurality of optical waveforms toward a first plurality of scan points that form a scan region within a field of view (FOV). A first signal type, a first signal duration, a first signal amplitude, or a first signal repetition frequency of the first plurality of optical waveforms is based on a first desired range of the first plurality of scan points.

Techniques pertaining to signaling designs for new modulation and coding schemes (MCSs) in next-generation wireless communications are described. An apparatus (e.g., a station (STA) ) generates a signal and transmits the signal in a wireless communication. In transmitting the signal, the apparatus transmits the signal with an indication of a MCS used in transmitting the signal. The indication, with a total of 5 bits, pertains to an entry in a MCS table listing a plurality of existing MCSs and one or more new MCS.

The invention discloses an obstacle avoidance tracking control method and system for a submarine cable laying robot with input saturation. The method comprises the following steps: constructing a robot kinematics and dynamics model; a tracking error is calculated based on the reference trajectory and the real-time position, and transient and steady-state performance of the error is ensured through a performance constraint function; designing an obstacle avoidance signal based on an artificial potential field method; combining the performance constraint signal, the speed information and the obstacle avoidance signal to design a virtual control law; designing a fuzzy adaptive law to estimate and compensate unknown disturbance and uncertainty of the system; and finally, a saturation auxiliary system is introduced to construct a final saturation control input so as to limit the amplitude of the actuator and reduce the loss. According to the invention, input saturation, external disturbance and model uncertainty can be effectively processed, and high-precision and strong-robustness obstacle avoidance trajectory tracking control is realized.

The invention discloses a multi-antenna amplitude comparison and direction finding method and system based on beam pattern intelligent interpolation, and the method comprises the steps: carrying out the sparse sampling of a complete and continuous one-dimensional pattern response signal of an array antenna, and obtaining an analog data set for training; performing normalization processing on the analog data set, reconstructing an obtained one-dimensional normalized signal into a three-dimensional tensor form, and obtaining a normalized sparse signal tensor; taking the normalized sparse signal tensor as input, introducing a position coding module in a sine and cosine form to construct a neural network model, and outputting and obtaining a complete directional diagram signal under a recovered original amplitude scale; and applying the recovered complete directional diagram signal under the original amplitude scale to a target angle estimation task so as to carry out amplitude comparison and direction finding. According to the method, the deep learning network specially designed for the one-dimensional amplitude signal is constructed, and the high-fidelity reconstruction of the sparse under-sampled signal is realized by using the powerful global attention mechanism of the deep learning network.

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

The present invention relates to a signal design technique resistant to phase distortion and may provide a method of a transmitter, the aspect comprising the steps of: modulating a sequence of source bits to be transmitted to a receiver to generate a first block of symbols; inserting at least one pilot into the first symbol block to generate a second symbol block; performing cumulative linear coding on the second symbol block to generate a third symbol block; performing real phase conversion on the third symbol block to generate a first signal converted to a phase value; adding a cyclic prefix (CP) to the first signal to generate a second signal; and wirelessly transmitting the second signal to the receiver.

This application discloses a synchronization signal design scheme, processing device, and system, which can be applied to, for example, new wireless systems. A first cyclic shift and a second cyclic shift are determined at least based on a cell identifier, wherein at least one of the first cyclic shift and the second cyclic shift is associated with the primary synchronization signal sequence. A secondary synchronization signal sequence is generated based on a first binary sequence that has been cyclically shifted by the first cyclic shift and a second binary sequence that has been cyclically shifted by the second cyclic shift. The secondary synchronization signal sequence is used together with the primary synchronization signal sequence for synchronization.

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.

A UE capability signaling design in different releases of a cellular communication specification is disclosed. A method for optimized capability signaling for a user equipment (UE) is disclosed. Since the same level of control at the UE side in combining a previous release N and a new release N+m, the UE should be able to utilize the existing signaling in release N as well as the signaling in release N+m. Otherwise, if the UE utilizes only release N+m, the UE will not be able to have the benefit of the same level of control provided in release N.

The invention discloses a differential game collaborative guidance method under data packet loss and time delay, which comprises the following steps of: after a data retransmission mechanism is introduced to establish a mapping relation between a packet loss probability and a time delay size, designing a proportional time delay accumulation error based on a neighbor node signal received by a missile node and a reference signal, and ensuring that the probability of packet loss is reduced in the error conversion mode; when the error converges to zero, the states of all the missiles can achieve cooperation. And respectively designing feed-forward and feedback control components by using the smoothed error in combination with instruction filtering inversion control and a differential game method so as to improve the robustness and the optimal performance of the designed guidance law. Meanwhile, for the problem that the optimal performance index function is difficult to solve in the feedback component design process, an evaluation network fitting performance index function is introduced in combination with an adaptive dynamic programming technology. According to the scheme, the error bounded property can be proved through the designed Lyapunov function, and the stability performance of a missile cluster using the guidance scheme under the condition of communication data packet probability loss and communication time delay is guaranteed.

Methods, systems, and devices for wireless communications are described. A wireless device, such as a radio frequency identifier (RFID) device, may receive a trigger message from another wireless device via a continuous radio frequency (RF) waveform that activates the RFID device. The trigger message may include one or more parameters for a channel state information (CSI) report, one or more sounding reference signals (SRSs), or both. The RFID device may send the CSI report, the SRSs, or both in a message via a portion of a modulated continuous RF waveform. The contents of the message may be based on the parameters and a capability of the RFID device.