70 results about "Phase offset" patented technology

A layered pulse generator for a vertical-cavity surface-emitting laser (“VCSEL”) driver is disclosed consisting of three elements: a low-speed pulse generator, a high-speed pulse generator, and a pulse generator selector, all of which are on-chip with the VCSEL driver. By providing these elements on-chip, overall system power and complexity are reduced while allowing for significantly higher pulse train frequencies compared with known systems. The high-speed pulse generator is capable of generating pulses faster and with higher resolution than that of the low-speed pulse generator. The high-speed pulse generator uses multiple clock outputs, phase shifted, and synthesized into a single pulse waveform capable of wide-ranging frequencies, duty cycles and pulse counts.

The application provides a multi-region brightness adjustment method of a display device, comprising: obtaining a PWM pulse starting time interval of adjacent partitions from a multi-partition PWM dimming system, and calculating a light-dark alternation window length according to the PWM pulse starting time interval; matching a spatial frequency change trend with a preset time and spatial frequency joint domain to obtain a phase offset range in which visible flicker stripes are located; performing periodic phase sampling on each partition PWM signal in the phase offset range to obtain a periodic phase offset record of each partition; obtaining low gray scale picture data from a current display frame of the display device, aligning the periodic phase offset record of each partition with the low gray scale picture data on a partition-by-partition basis, identifying a partition in which a brightness ripple exceeds a preset threshold, reallocating a PWM phase in the partition, and obtaining an adjusted phase offset.

According to one embodiment, an antenna device includes a first module including first transmit and receive antennas and a second module including second transmit and receive antennas. The first transmit antennas transmit radio waves based on a first reference signal. The second transmit antennas transmit radio waves based on a second reference signal. A phase value is calculated based on a phase difference between received signals of two virtual antennas formed based on received signals of the first receive antennas. A phase of the second reference signal is shifted by the phase value.

The spatial resolution of the virtual array antenna and the accuracy of the virtual array antenna's target direction estimation are adjusted according to the purpose. [Solution] The antenna device according to the embodiment comprises a reference signal generation unit, a first module, a second module, and a phase value generation unit. The phase value generation unit generates a first phase value based on the phase difference of the received signals in at least two virtual antennas, which are formed based on the received signals received by at least a portion of the first receiving antenna and the second receiving antenna when the first transmitting antenna transmits a transmission signal based on the first reference signal. The first transmission processing circuit shifts the phase of the second reference signal, which is transmitted by the second transmitting antenna after the first transmitting antenna, by the first phase value.

The application provides a power management adaptive feedback regulation method and system with a wide voltage input range. In the application, the output current ripple waveform of the power supply is collected, wavelet packet decomposition is performed to extract the energy distribution of the characteristic frequency band, and the dynamic offset characteristics of the energy distribution with the wide voltage input fluctuation are used to identify the load change mode. The electromagnetic vibration caused by the current ripple is captured and converted into recovered electrical energy, which is directly supplied to the feedback circuit to realize energy self-supply. The recovered electrical energy is introduced into the ripple injection inverting proportional circuit, the gain coefficient and phase offset are dynamically set according to the load mode, and the inverting ripple signal is generated. The inverting ripple signal is superimposed on the feedback voltage to offset the ripple fluctuation by dynamically tracking the ripple amplitude change caused by the wide voltage input. Finally, the response speed of the rectifier tube driving timing is adjusted according to the input voltage fluctuation amplitude, and the optimized feedback control signal is generated. The application realizes the load fluctuation compensation and energy recovery closed loop.

The application provides a baseband radio frequency signal data feedback processing method based on vector modulation, which first receives a baseband signal data set transmitted by a target radio frequency link in a preset frequency band, which contains multiple signal frame original modulation parameters and corresponding radio frequency feedback signal waveforms, then calculates feedback error indicators composed of phase offset, amplitude distortion and spectral leakage factor according to the radio frequency feedback signal waveforms, quantizes the modulation error, analyzes the feedback signal waveforms in the time-frequency domain, extracts error feature vectors, inputs the pre-trained model for cross-frame correlation learning, generates a dynamic adjustment parameter sequence containing time sequence dependence, and finally constructs a closed-loop feedback control link based on the dynamic adjustment parameter sequence and the original modulation parameters, so as to realize accurate processing and optimized control of the baseband radio frequency signal and effectively improve the signal transmission performance.

Apparatuses, methods, devices, and media for reducing calibration report overhead are disclosed. An example terminal device can include at least one processor and at least one memory. The at least one memory can store instructions that, when executed by the at least one processor, can cause the terminal device to determine respective phase offsets of a plurality of channel state information reference signal resources; select, as a reference channel state information reference signal resource, among candidate reference channel state information reference signal resources that are the plurality of channel state information reference signal resources respectively, a reference channel state information reference signal resource based on a similarity of the phase offset of the candidate reference channel state information reference signal resource and the phase offsets of the plurality of channel state information reference signal resources; and transmit, to a network, a calibration report that includes an indication of a first type of channel state information reference signal resource.

The application belongs to the technical field of measured value transmission systems, and discloses a monitoring data transmission method based on Beidou positioning, which comprises the following steps: acquiring a Beidou timing pulse, geographical coordinates and an ephemeris update sequence identification code, collecting physical state parameter sequences of a monitored object system; generating a measured value fluctuation gradient representing the transient characteristics of the physical state through first-order difference operation; taking the ephemeris update sequence identification code as a synchronization reference, and combining gradient calculation to obtain a dynamic disturbance offset; determining a target sending time according to the basic phase offset mapped by the geographical coordinates and the dynamic disturbance offset; and reporting monitoring data at the target sending time. The application establishes an endogenous coupling mechanism of physical measurement state and measured value transmission timing, utilizes a synchronous ephemeris sequence to drive a terminal to generate a deterministic off-peak displacement, and eliminates the concurrent collision of measurement data caused by spatial correlation physical events.

This invention relates to the field of microgrid control technology and discloses a method and system for synchronizing microgrid inverters based on satellite time synchronization. The method includes at least: receiving a satellite time synchronization signal and preprocessing it to obtain a global time reference signal; acquiring real-time operating parameters of each inverter within the microgrid and calculating the real-time phase offset of each inverter based on the global time reference signal and each real-time operating parameter; generating a synchronization phase angle for the corresponding inverter based on each real-time phase offset; acquiring real-time interaction data of each inverter and updating each initial phase adjustment command based on the real-time interaction data and the global synchronization phase angle to obtain a target phase adjustment command for the corresponding inverter; and adjusting the output voltage of the corresponding inverter using each target phase adjustment command. This invention improves the synchronization control accuracy and operational stability of multi-inverter clusters in microgrids.

Apparatus and methods are provided for self-phase alignment in a phased-array transceiver. Detectors receive a first signal from a TX-path input of a first channel and a second signal from an RX-path output of a second channel, producing a DC value representing the phase difference between the signals, iteratively adjust RX phase shifters based on the DC values until the phase difference equals a predetermined amount, then apply a corrective phase opposite in sign and equal in magnitude to that amount to generate a final alignment value for normal operation. The predetermined amount may be ±90°. Each detector may include twin double-balanced mixers, a low-pass filter, and comparator. In one embodiment, a TX phase alignment is performed before the RX phase alignment, no additional RX-phase correction is required when the TX phase-offset values determined by the TX alignment are applied to each TX phase shifter for the RX alignment.

The utility model relates to battery leakage monitoring and protection technical field, concretely relates to a current leakage monitoring and automatic circuit protection circuit system, include: a plurality of independent protection unit and a centralized management module. Each protection unit corresponds to a battery section, possesses local leakage detection and circuit breaking function. Each protection unit includes ripple injection module, phase detection module, circuit breaker executor and mechanical interlock mechanism, through the ripple injection module in the battery pack ground loop injects high frequency ripple, and phase detection module extracts the phase shift and converts into voltage signal and outputs the breaking instruction. Circuit breaker execution controls double coil magnetic latching relay action through H bridge chip, realizes the physical isolation of fault section. Mechanical interlock mechanism prevents the adjacent relay misoperation through the linkage rod, improves the system security. The centralized management module summarizes each independent protection unit fault section positioning. The system realizes the accurate positioning and quick power-off isolation of lead-acid battery pack leakage fault.

This disclosure relates to 5G or 6G communication systems for supporting higher data transmission rates. Apparatus and methods for calibration measurements are also included. One method performed by a user equipment (UE) includes: receiving information about K non-zero power channel state information reference signals (NZP CSI-RS) (K>1) and a calibration report; and measuring the K NZP CSI-RS based on the information. The method further includes determining a calibration offset for each of the K NZP CSI-RS based on the measurement, and transmitting a calibration report including at least one indicator indicating the calibration offset for each of the K NZP CSI-RS. Each of the K NZP CSI-RS is associated with a CSI-RS port. The calibration offset corresponds to at least one of delay offset (DO), frequency offset (FO), and phase offset (PO).

The application provides a probe frequency response calibration parameter determination method, a measurement system and a storage medium. The calibration parameter determination method introduces a composite test signal containing a steady-state sweep signal and a transient pulse signal. Based on the data sets obtained by responding to the same test signal under two conditions that the calibration system is not connected to the probe and is connected to the probe, the de-embedding calculation is performed, that is, the amplitude is divided to eliminate the link gain deviation, and the phase is subtracted to peel off the channel phase offset, the accurate extraction of the independent frequency response characteristics of the probe is realized, and the frequency response calibration parameter of the probe is determined. The application eliminates the system error introduced by the test environment and the rear-end measurement link, improves the calibration accuracy of the amplitude-frequency characteristics and the phase-frequency characteristics of the probe in the whole working frequency band, provides a reliable basis for the oscilloscope and other measurement equipment to implement accurate real-time anti-distortion compensation in actual signal capture, and ensures the restoration authenticity of the whole measurement system in high-frequency and wideband signal testing.

This application discloses a programmable circuit, an integrated circuit, and an electronic device. The programmable circuit comprising: a signal conversion module that converts parallel signal input from an external circuit into a serial signal; a signal configuration module that shifts the phase of the serial signal output by the signal conversion module by 0 degree or 360 degree; a first enable signal generation module that generates a first enable signal; a DDR configuration module that generates a second enable signal and sets the DDR mode of the programmable circuit; a phase monitoring module that monitors the phase of the DQS signal input from the external circuit and outputs the monitoring results; a phase adjustment module that adjusts the phase of the first enable signal generated by the first enable signal generation module based on the monitoring results input from the external circuit.

The example of the present application provides a 6G reconfigurable MIMO electromagnetic domain precoding configuration method, comprising establishing a system model containing multipath effect, array geometry and space-fed propagation; introducing spherical harmonic orthogonal decomposition method, representing the phase offset of T-RIS array as a linear combination of spherical harmonic basis functions, converting the spatial domain channel into low-dimensional electromagnetic domain channel state information, and obtaining the electromagnetic domain precoding coefficient vector; taking the system and rate maximization as the target, setting the total transmission power constraint and the phase discrete quantization constraint; using the alternating optimization framework to iteratively solve the electromagnetic domain precoding coefficient vector and the digital domain precoding matrix; and outputting the optimized precoding matrix to configure the T-RIS phase shifter and the base station digital precoder. The example of the present application significantly improves the multi-user spectral efficiency under the condition of meeting the hardware discrete phase limit, reduces the computational complexity, and is suitable for 6G reconfigurable MIMO system through electromagnetic domain dimension reduction and alternating optimization.

A first detector that receives and detects 3-tone signals of three patterns of a first 3-tone signal obtained by combining three waves of angular frequencies ω1, ω2, and ω3 (here, ω2−ω1=ω3−ω2=Δω is established), a second 3-tone signal in which each tone has a phase offset, and a third 3-tone signal having a phase offset different from the phase offset of the second 3-tone signal, a BPF that allows only a beat component of an angular frequency difference Δω between adjacent waves of the 3-tone signals among signals output from the first detector to pass, a second detector that detects power of the beat component that has passed through the BPF, a voltmeter that measures a voltage of a signal output from the second detector, and a phase calculator that calculates a phase based on the measured voltage values of the three patterns.

The application belongs to the technical field of signal synchronization, and discloses a multi-camera anti-shake timing synchronization control system and method based on FPGA; the method comprises the following steps: taking FPGA as a core, generating an FSYNC signal as a camera exposure reference, and obtaining a delay value through timestamp and differential measurement; collecting IMU data to obtain a global motion vector through a gradient descent algorithm; combining the two to analyze and obtain a phase offset and feed back to the FPGA, and the FPGA adjusts the FSYNC signal according to the global motion vector; the application realizes nanosecond-level timestamp recording through the homologous clock reference and hardware-level signal binding mechanism, and combines global motion vector analysis and dynamic phase offset adjustment, thereby breaking through the limitation of the prior art that relies on static time difference compensation.

For example, a phase shifter may include an input to receive an input clock signal having an input frequency and an input phase. For example, the phase shifter may include a quadrature phase-shift generator configured to generate a first signal and a second signal based on the input clock signal, the first and second signals having the input frequency, wherein a phase of the first signal is based on the input phase, wherein a phase of the second signal is shifted by a quadrature phase-shift relative to the phase of the first signal. For example, the phase shifter may include an output to provide an output based on the first signal and the second signal.

The application provides a TCM mode soft switching control method of a multi-phase interleaved parallel bidirectional DC / DC converter, which comprises the following steps: collecting state information in the operation process of the bidirectional DC / DC converter to generate an outer loop control error; optimizing the parameters of a PID controller based on an improved whale optimization algorithm to obtain an optimized PID controller which is used to output an outer loop control variable; obtaining the outer loop control variable and the collected state information to calculate a theoretical timing variable of synchronous tube delay turn-on; obtaining the total link delay of a zero-crossing detection circuit to calculate the synchronous tube delay turn-on time after compensation; calculating a dead time timing variable according to the current state information; taking the actual switching period of a main phase as a synchronous reference to synchronize the periods of the remaining phases and set a phase offset, so that the phases can stably operate in a preset staggered phase relationship under the condition of non-fixed frequency; and the method can realize the stable soft switching operation of the multi-phase interleaved parallel bidirectional DC / DC converter under complex working conditions such as voltage fluctuation and load change.

The application relates to the technical field of wireless communication, and discloses an intelligent reflecting surface MEC system resource optimization method and system, which comprises the following steps: receiving a user equipment incident signal through an intelligent reflecting surface array, estimating a signal arrival angle from a signal covariance matrix, and analyzing a Doppler frequency shift; inputting signal parameters into a Kalman filter to track a user motion trajectory, and establishing a motion state model; inputting the motion state and real-time channel state information into a prediction model based on a long short-term memory network to predict a future time slot signal-to-noise ratio; comparing the channel quality prediction value with a rated value, calculating a power compensation amount, generating a phase offset matrix, and forming an enhanced beam at a predicted position; and when it is predicted that a user equipment will generate a calculation task, pre-allocating a calculation resource block and pre-loading context data at an edge server, so that the communication and calculation resources are cooperatively optimized, and the service continuity and resource utilization efficiency in a mobile scene are improved.

The application discloses a punch feeding stroke synchronous adaptive control system and relates to the technical field of punch feeding. The system comprises the following steps: collecting the crank angle, servo position speed, tension and to-position signal, aligning the synchronous observation package according to the unified timestamp, calculating the command to-position and actual to-position difference to obtain the synchronization error, reconstructing the command trajectory and actual trajectory and differentiating to obtain the phase offset, length deviation, acceleration and deceleration residual error and angle jitter; constructing the abnormality discrimination index set based on the tension fluctuation, micro-slip indication and pulse integrity, checking the output error source label and reliability according to the error decomposition quantity consistency, generating the compensation update control condition according to the label and the reliability, updating the phase compensation quantity, length compensation quantity and control gain and reserving the rollback benchmark; performing the boundary constraint on the compensation increment, freezing and rolling back in the abnormal state, adjusting the prohibited feeding interval according to the calculation window margin and generating the self-checking record; and the system can inhibit the compensation drift, improve the safety and stability of the narrow window high-speed punch.

A communication method and apparatus, which relate to the technical field of communications. The method comprises: a first communication apparatus acquiring first information to respectively perform channel measurement on a first antenna panel group and a second antenna panel group on resources indicated by the first information, so as to obtain a measurement result; and then, sending the measurement result, wherein the measurement result comprises phase information of the first antenna panel group, and bending angle information and phase offset information of the second antenna panel group relative to the first antenna panel group. In this way, the amount of feedback corresponding to a second antenna panel group can be reduced, and thus feedback overheads of a measurement result can be reduced.

The invention discloses a hemispherical gyroscope circuit real-time self-calibration method and a hemispherical gyroscope, and the method comprises the following steps: a CPU alternately transmits a driving signal to a gyroscope and transmits a self-calibration signal to a loopback circuit, the CPU controls an ADC to alternately collect a gyroscope detection signal and a self-calibration loopback signal, every three alternating periods are used as a compensation period, and the self-calibration loopback circuit is used for compensating the gyroscope detection signal and the self-calibration loopback signal; self-calibration signals of the first period and the second period of each compensation period are transmitted to the loopback circuit through the DAC circuit, self-calibration signals of the third period are directly transmitted to the loopback circuit, demodulation and operation are carried out on circuit loopback signals of each compensation period, and gain coefficients and phase deviations of the detection circuit and the driving circuit are obtained. And calibrating the detection signal and the driving signal. Gain errors and phase errors of the circuit can be completely eliminated, long-term random drifting or error drifting changing along with temperature is avoided, the calibration process is automatically achieved through a program, and a large amount of prior calibration work is avoided.

The present application belongs to the technical field of magnetic particle imaging, and particularly relates to a phase offset calibration method for the instantaneous position of a magnetic field-free point in magnetic particle imaging, aiming to solve the problem that the existing phase offset calibration method for the instantaneous position of a magnetic field-free point requires separate measurement or calculation for each device in the MPI device, resulting in a large workload, a long calibration process time and troublesome adjustment. The method comprises: collecting magnetic particle response signals and current intensity signals as input signals; based on the input signals, cyclically automatically modulating the phase of the instantaneous position of the magnetic field-free point in the imaging process of the MPI device; after the automatic phase modulation is completed, solving the optimal solution of the phase offset; and based on the optimal solution of the phase offset, again automatically modulating the phase of the instantaneous position of the magnetic field-free point in the MPI device to obtain the final instantaneous position and instantaneous speed after phase offset calibration. The present application does not require setting of hardware, greatly reduces the difficulty of phase modulation and facilitates personnel operation.

The application provides a synchronization circuit based on clock phase adjustment, comprising: a clock dividing circuit, which is used for generating a divided clock signal from an input system clock; a phase detection circuit, which is connected with the clock dividing circuit and is used for obtaining a phase offset value according to an input synchronization reference signal and the divided clock signal; a phase adjustment circuit, which is connected with the clock dividing circuit and the phase detection circuit and is used for adjusting the phase of the input divided clock signal according to the phase offset value to obtain a phase-adjusted divided clock signal; and a synchronizer circuit, which is connected with the phase adjustment circuit and is used for obtaining a local synchronization reference signal according to the phase-adjusted divided clock signal and the synchronization reference signal. The application can quickly adjust the clock phase in real time according to the phase relationship between the reference signal and the divided clock, does not lose the sampling edge of the clock, and can be applied to integrated circuits with high sampling accuracy requirements.

The embodiments herein relate to method and apparatus for phase offset estimation and compensation for Physical Random Access Channel (PRACH) with large frequency offset. In some embodiments, there proposes a method for Physical Random Access Channel (PRACH) preamble detection. The method may comprise the steps ofreceiving a PRACH preamble with a plurality ofrepeated sequences, in which each sequence includes a plurality of elements on a plurality of antennas; performing a phase offset estimation for multiple repetitions within the plurality of repeated sequences, by selectively correlating the multiple repetitions based on magnitudes of the elements; performing a phase compensation for the multiple repetitions, based on the estimated phase offset; performing a sequence combination for the multiple repetitions; and performing a sequence detection on the combined multiple repetitions.

The application discloses a through-wall fall detection and early warning system and method based on a Lora signal, wherein a transmitter and a receiver are placed on the same side under a partition in a room, the receiver is installed with two antennas, can simultaneously receive the signals reflected and diffracted by multiple paths in the environment by the transmitter, and utilizes signal division operation to eliminate the influence of phase offset, so that the transmission signal and the receiving signal clock are synchronized; in order to cope with the problem of weak signal caused by the attenuation of Lora signal transmission through the partition, a time domain aliasing method is used to amplify the signal, the time-frequency spectrum of the signal is extracted, the signal entropy information, the power mutation curve and the signal-to-noise ratio are calculated as the signal characteristics. The data is labeled based on a fuzzy labeling method to train a deep model, and the fall behavior of a person in the room is detected through the model, and if the fall behavior occurs, an alarm signal is sent. The application can distinguish the normal activity of a person from the fall behavior, has a wide sensing range and high sensing accuracy.

There is provided techniques for transmitting a signal from a transceiver device. The transceiver device comprises an antenna array having individually controllable subarrays. Each of the controllable subarrays is controllable by a respective digital phase shifter. Each of the controllable subarrays comprises fixed subarrays. Each of the fixed subarrays is controllable by a respective analog phase shifter. A method comprises obtaining an ideal phase value for each analog phase shifter. The method comprises quantizing each ideal phase value to a respective quantized phase value, with a phase offset value added to each ideal phase value before quantization. The method comprises applying each quantized phase value to its analog or digital phase shifter when using the antenna array for transmitting the signal from the transceiver device.

The present invention relates to a method for operating an ultrasonic sensor array for a driver assistance system, comprising the steps of: exciting a first ultrasonic transducer of the ultrasonic sensor array with a first signal to emit an ultrasonic signal, controlling a second ultrasonic transducer located close to the first ultrasonic transducer with a second signal, wherein the second signal has a defined phase offset to the first signal in order to reduce movements of the second ultrasonic transducer.