17 results about "Pulse distortion" patented technology

The invention discloses a coupling pulse distortion compensation method for superconducting quantum computing, and relates to the field of signal processing, and the method comprises the steps: S1, inputting an initial square wave signal into a first IIR filter, and reducing the frequency attenuation of superconducting quantum bits; s2, outputting the initial square wave signal to a second IIR filter to improve the high-frequency component of the initial square wave signal; s3, outputting the initial square wave signal to a third IIR filter to eliminate pulse back edge reflection of the initial square wave signal; and S4, outputting the initial square wave signal to a first FIR filter to carry out ripple correction so as to complete pre-distortion correction. By setting the staged pre-distortion compensation of the three-section IIR filter and the one-section FIR filter, the pre-distortion compensation of the square wave signal is more accurate and stable, the square wave edge response is rapid and the amplitude is correct, and the time delay and the amplitude error caused by the link are reduced; the quantum bit Z-axis phase control method has the advantages that quantum bit Z-axis phase control is more accurate, and the fidelity of a square wave signal gate is prevented from being reduced.

Methods, systems and apparatus for microwave pulse distortion compensation using reflection parameters from standing wave analysis. In one aspect, a method includes generating a pre-distorted control signal that implements a single qubit rotation operation and applying the pre-distorted control signal to a qubit to perform the rotation operation on the qubit, the pre-distorted control signal comprising an inverted transfer function. The inverted transfer function comprises values of parameters obtained through fitting control pulse amplitudes that implement a full qubit population transfer to a reflection model with reflection model parameters that parameterize a standing wave contribution to the control signal that modifies an effective amplitude of control pulses incident on the qubit.

This invention discloses an intelligent testing system for corner sensors based on multi-dimensional feature fusion, relating to the field of intelligent sensor testing. It includes a main control computing unit, a test bench, a multi-channel pulse acquisition module, and a multi-dimensional electrical parameter synchronous sampling module. The main control computing unit outputs global timing control commands and receives fused data streams for analysis. The test bench responds to the control commands, establishes a mechanical reference, and drives the sensor to rotate and output dynamic electrical signals. Within the same time window, pulse timestamps and transient electrical characteristic parameters are collected, dynamically mapping the pulse time sequence to an absolute spatial angle sequence. This allows for multi-dimensional determination of the root cause of pulse distortion and the sensor's electrical performance. This invention solves problems such as lost timing correlation, difficulty in fault tracing, and low automation in traditional testing through microsecond-level synchronous sampling, spatiotemporal dynamic mapping algorithms, and multi-dimensional feature fusion, achieving high-precision, intelligent, and visualized comprehensive testing of corner sensors.

Methods, systems, and apparatus for microwave pulse distortion compensation using reflection parameters from error amplification pulse sequences. In one aspect, a method includes generating a pre-distorted control signal that implements a single qubit rotation operation and applying the pre-distorted control signal to a qubit to perform the rotation operation on the qubit. The pre-distorted control signal comprises an inverted transfer function, where the inverted transfer function comprises values of parameters obtained through fitting measured qubit parasitic rotation angles per gate to a reflection model that models pulse distortion in the quantum computing device; and the qubit parasitic rotation angles per gate are measured using a first pulse sequence that amplifies out-of-phase pulse distortion in the quantum computing device and a second pulse sequence that amplifies in-phase pulse distortion in the quantum computing device.

Circuits and methods are disclosed for eliminating narrow pulses and compensating for the elimination, and compensating for dead time and non-ideal characteristics in converters, including voltage drops across switches and busbars, pulse distortions caused by delays, unequal rise and fall times, and DC busbar voltage drops. The method can be used for a converter with two complementary switches. A circuit embodiment includes three parts. The first portion calculates a deviation from a reference voltage using a dead time. The second portion includes a controller that adds a compensation value based on a difference between the converter output and the reference voltage. The third section cancels the narrow pulse and compensates for the cancellation by accumulating the difference between the reference signal and the output signal using an integrator, and adds a compensation value using a quantizer without introducing a new narrow pulse. The disclosed system eliminates narrow pulses to reduce loss, extend life, reduce EMI and improve output power quality.

The application discloses a quantum bit frequency control signal generation method, device and quantum computer. The quantum bit frequency control signal generation method is used for outputting a frequency control signal to a magnetic flux regulation circuit of a quantum bit. The method comprises the following steps: measuring a pulse distortion waveform output by a quantum control system to the magnetic flux regulation circuit of the quantum bit; wherein the pulse distortion waveform is a waveform after a control waveform is distorted when the control waveform is output by the quantum control system; performing filtering processing on waveform data of the pulse distortion waveform by using a digital filter and outputting filtered target waveform data; and outputting a target control signal to the magnetic flux regulation circuit according to the target waveform data. According to the application, a digital filter of a corresponding parameter can be determined by only one distortion measurement for each output channel, so that distortion measurement and calibration are avoided for each control signal that needs to be output, and the quantum computing efficiency is improved.

Methods, systems, and apparatus for microwave pulse distortion compensation using reflection parameters from error amplification pulse sequences. In one aspect, a method includes generating a pre-distorted control signal that implements a single qubit rotation operation and applying the pre-distorted control signal to a qubit to perform the rotation operation on the qubit. The pre-distorted control signal comprises an inverted transfer function, where the inverted transfer function comprises values of parameters obtained through fitting measured qubit parasitic rotation angles per gate to a reflection model that models pulse distortion in the quantum computing device; and the qubit parasitic rotation angles per gate are measured using a first pulse sequence that amplifies out-of-phase pulse distortion in the quantum computing device and a second pulse sequence that amplifies in-phase pulse distortion in the quantum computing device.

The present application belongs to the technical field of ammunition testing, and particularly relates to a kind of pulse signal automatic evaluation methods, comprising the following steps: collecting pulse channel signals; the pulse channel signals are divided into non-pulse area and pulse area; using two filtering parameters to do median filtering on the data of non-pulse area and pulse area respectively; judging whether the pulse channel signals are within the specified envelope; calculating the amplitude, rising edge time and width of the pulse to be detected by counting the data in the pulse area; judging whether the amplitude, rising edge time and width of the pulse to be detected meet the requirements; forming an evaluation report according to the determination result. The method uses different filtering parameters to process the pulse area and non-pulse area respectively, which is anti-interference and does not cause pulse distortion; the histogram statistical calculation of pulse amplitude, rising edge and width has good anti-interference performance.

The invention discloses a full-digital transmitter pulse distortion error correction method, and relates to the technical field of wireless communication. The method comprises the following steps: establishing a static compensation factor lookup table; according to the phase shift angle of the initial baseband signal, obtaining an amplitude compensation factor statistical expected value and a phase compensation factor statistical expected value of the initial baseband signal by looking up a static compensation factor lookup table, and performing static compensation of amplitude and phase on the initial baseband signal to obtain a baseband signal after static compensation; adaptively updating an amplitude coefficient and a phase coefficient of the double-path parallel adaptive filter to obtain an optimal amplitude coefficient and an optimal phase coefficient; and inputting the baseband signal after static compensation into a double-path parallel adaptive filter with an optimal amplitude coefficient and an optimal phase coefficient to generate a pre-distortion signal, and finally outputting a corrected RFPWM digital pulse signal. According to the invention, the linear performance of the whole all-digital transmitter system can be improved.

The present disclosure provides a laser current control method for suppressing laser relaxation oscillations, relating to the field of laser control technologies. The method comprising: controlling a current signal with a preset waveform to be input into a laser drive circuit; the preset waveform includes a first step and a second step, where the amplitude of the first step is less than that of the second step, and the current signal of the first step triggers a laser relaxation oscillation waveform whose amplitude is less than a safety threshold; and adjusting the amplitude of the second step based on a relationship between the average laser output power and the drive current. According to the embodiments of the present disclosure, a small-step current waveform is designed to effectively suppress damage to optical components in the optical path caused by laser relaxation oscillations. The reduced pulse distortion ensures that the threshold current corresponding to different pulse frequencies exhibits linearity under the same duty cycle, eliminating the need to record threshold currents and corresponding linear equations for each duty cycle. This allows the output current to be more precisely and accurately adjusted to achieve a desired terminal average power.

The application belongs to the technical field of backlight driving, and provides a reference voltage generation circuit, a driving chip, a driving system and electronic equipment. The circuit comprises a shaping module, a signal generation module, a voltage generation module and a filtering module; the signal generation module is connected with the shaping module, the voltage generation module and the filtering module. The application optimizes the PWM dimming signal through shaping, improves the suppression ratio of the reference voltage to the power voltage change, and can compensate the pulse width error caused by waveform distortion and switching dead time. Further, the voltage generation module generates a first voltage to provide a lower limit voltage for the reference voltage in the deep dimming scene, which can not only compensate the pulse width error after shaping optimization, but also compensate the error caused by switching dead time, further improve the accuracy and stability of the reference voltage in the deep dimming scene, and significantly improve the problems of narrow pulse distortion, pulse width jitter, frequency flicker and insufficient accuracy existing in the existing scheme.

This invention discloses a broadband all-fiber femtosecond laser system based on chirped pulse amplification and its adjustment method. The broadband all-fiber femtosecond laser system includes a broadband dissipative soliton mode-locked fiber laser and an all-fiber chirped pulse amplifier connected together. The broadband dissipative soliton mode-locked fiber laser includes a first pump source, a first wavelength division multiplexer, a first gain fiber, a first polarization controller, a polarization-dependent isolator, a second polarization controller, and a coupler. The all-fiber chirped pulse amplifier includes a first polarization-independent isolator, a dispersion-compensating fiber, a second wavelength division multiplexer, a second gain fiber, a third wavelength division multiplexer, a single-mode fiber, a second polarization-independent isolator, a second pump source, and a third pump source. The system achieves broadband characteristics through fiber length adjustment, spectral adjustment, and micro-adjustment modules. This invention has a simple structure, wide application scenarios, pulse distortion resistance, broad spectrum, and strong anti-interference capability.

The application discloses a method and system for optimizing a quantum bit CZ gate and a quantum computer. The method comprises the following steps: placing two adjacent quantum bits at a working point and closing a coupler between the two adjacent quantum bits; applying a pulse signal to the coupler to obtain the relationship between the occupation probability of the two quantum bits connected with the coupler being in a |1> state and the pulse signal; wherein the pulse signal is used to adjust the working frequency of the coupler; using a Ramsey experiment to obtain the relationship between the conditional phase of two adjacent quantum bits and the pulse signal; obtaining the parameters of the pulse signal when the occupation probability is greater than a first set value and the conditional phase θ control =; wherein the pulse signal is applied to the coupler connecting the two quantum bits, and the pulse signal is a high-frequency pulse and almost a single frequency; in the application, the pulse distortion caused by the line can be ignored, the time consumed by distortion calibration can be saved, and a CZ gate with a high execution degree is realized.

Methods, systems and apparatus for microwave pulse distortion compensation using reflection parameters from standing wave analysis. In one aspect, a method includes generating a pre-distorted control signal that implements a single qubit rotation operation and applying the pre-distorted control signal to a qubit to perform the rotation operation on the qubit, the pre-distorted control signal comprising an inverted transfer function. The inverted transfer function comprises values of parameters obtained through fitting control pulse amplitudes that implement a full qubit population transfer to a reflection model with reflection model parameters that parameterize a standing wave contribution to the control signal that modifies an effective amplitude of control pulses incident on the qubit.

The present application relates to the technical field of laser control. Provided is a laser current control method for suppressing laser relaxation oscillations. The method comprises: controlling a current signal of a preset waveform to be input into a laser driving circuit, wherein the preset waveform comprises a first stage and a second stage, the amplitude of the first stage is less than the amplitude of the second stage, and the amplitude of a laser relaxation oscillation waveform induced by a current signal of the first stage is less than a safety threshold value; and on the basis of a relationship between an average laser output power and a driving current, adjusting the amplitude of the second stage. In the embodiments of the present application, a small-step current waveform is designed, thereby effectively suppressing the damage caused by laser relaxation oscillations to optical devices in an optical path; a smaller pulse distortion causes threshold currents corresponding to different pulse frequencies to exhibit linearity under the same duty cycle, such that it is unnecessary to record, one by one for each duty cycle, the threshold currents and linear equations in one variable that correspond to the frequencies; and an output current can be more accurately and precisely adjusted to obtain the required average terminal power.

This invention discloses a wheel speed signal self-calibration method based on spoke topology prior, belonging to the field of signal correction technology. By introducing spoke topology prior to generate an ideal pulse timing template, the method performs distribution deviation detection on the measured pulse sequence to accurately identify abnormal pulse segments. Based on this, it limits the candidate time interval for missing pulses. Furthermore, by combining the extraction of variation features of the original magnetic response signal and rhythm consistency constraint screening, the position of pulses not identified by the normal decision chain is structurally reconstructed. This enables effective correction of pulse distortion and pulse missingness to address the magnetic field distortion problem caused by the small number of spokes and the small tooth groove depth-to-width ratio. It avoids deviations or jumps in wheel speed calculation results, improves the accuracy of speed statistics, and enhances the stability and reliability of the vehicle control strategy.

An on-line upgrade communication device comprises a pulse signal generation circuit which is configured to receive a communication pulse signal output by an OSSD interface at a first input end and generate a first output pulse signal at a first output end, and to receive the first output pulse signal at a second input end and generate a second output pulse signal at a second output end; the receiving end of the serial port communication module is connected with the second output end of the pulse signal generation circuit, and the serial port communication module is used for receiving the second output pulse signal, converting the second output pulse signal into serial communication data and sending the serial communication data to an upper computer; and the power supply module is used for providing a first direct-current power supply and a second direct-current power supply for the pulse signal generation circuit and providing the second direct-current power supply for the serial port communication module. According to the embodiment of the invention, the stable and controllable pulse width can be obtained again, and the problems of propagation delay and pulse distortion introduced by the OSSD interface and peripheral circuits thereof are effectively compensated.