39 results about "Pulse spectrum" patented technology

The invention provides a detection method and device for assisting in determining blood pressure and cardiovascular health levels. The detection method and device can be applied to the technical field of coherent optical imaging detection. The method comprises the following steps: continuously collecting diffused coherent light emitted from a tissue at a preset position within a preset duration to obtain a plurality of diffused coherent images; determining a dynamic coherent optical signal corresponding to each pixel according to the plurality of diffusion coherent images, and determining a tissue static signal and a tissue dynamic signal according to the dynamic coherent optical signal and the reference coherent optical signal; calculating information entropy of the tissue dynamic signal to obtain a flow velocity pulse signal; calculating the average intensity of the static signals to obtain volume pulse signals; respectively performing Fourier transform on the flow rate pulse signal and the volume pulse signal to obtain a flow rate pulse frequency spectrum and a volume pulse frequency spectrum; performing cross-correlation operation on the flow rate pulse spectrum and the volume pulse spectrum to obtain multi-dimensional fusion features, and determining the blood pressure and cardiovascular health level according to the multi-dimensional fusion features.

The invention discloses an ultrafast laser generating device. The device comprises an ytterbium-doped femtosecond laser light source, a first focusing lens, a first optical window, a first-stage energy transfer device, a first-stage hollow-core capillary optical fiber, a second optical window, a concave reflecting mirror, a half-wave plate, a wire grid polarizing film, a second focusing lens, a third optical window, a first air chamber, a second-stage hollow-core anti-resonance optical fiber, a second air chamber and a fourth optical window. The invention discloses a 90-degree off-axis parabolic mirror and a frequency resolution optical switch pulse measuring device. The incident pulse spectrum is broadened by utilizing a self-phase modulation effect by changing the type and the air pressure of inert gas in the first-stage hollow-core capillary optical fiber; and then the second-stage hollow-core anti-resonance optical fiber is filled with inert gas to generate an air pressure gradient, and sub-20fs-order ultrafast laser flexible transmission is finally realized by utilizing a soliton self-compression effect.

The invention relates to the technical field of pulse load energy optimization control, in particular to a pulse type ultra-low power consumption energy management system based on a super capacitor, which comprises a pulse spectrum analysis unit, a capacitor bank dynamic tuning unit and a charge state compensation unit, a pulse spectrum analysis unit extracts a load pulse dominant frequency component through a window function weighting algorithm to generate a target frequency value, and a capacitor bank dynamic tuning unit inquires a mapping table according to the target frequency to adjust series-parallel connection combination of the super capacitors and injects a reverse reactance component to offset a resonant impedance difference value. And the charge state compensation unit predicts the residual charge quantity by using a Kalman filter, and triggers a charge redistribution strategy in a non-pulse period, thereby solving the problems of insufficient dynamic impedance matching and low charge balance efficiency in the traditional technology, realizing high-efficiency and low-consumption management of the energy of the super capacitor, improving the energy transmission efficiency, and reducing the energy consumption. And the endurance time of the equipment is prolonged.

Disclosed is a pulsed laser apparatus and method of generating a laser pulse. The apparatus includes an input coupler configured to receive pumping light from a pumping light source and a seed pulse from a seed pulse generator. The apparatus further includes a doped fiber-optic cable with an input port at a first end configured to receive the pumping light and the seed pulse. The doped fiber-optic cable amplifies the seed pulse to generate an output pulse. Along a first length of the doped fiber optic cable, the pulse spectrum broadens rapidly owing to nonlinearity. Beyond the first length in an extended portion, the output pulse shifts towards longer wavelengths and broadens in both spectral and temporal domains. The apparatus also includes an output port at a second end of the doped fiber-optic cable, wherein the output pulse exits the doped fiber-optic cable at the output port.

The invention relates to the technical field of ultrafast laser, and discloses a negative chirp management method and device of a laser and a medium. The method comprises the following steps: pre-processing a seed pulse, outputting the seed pulse through a mode-locked optical fiber oscillator, and primarily amplifying the seed pulse through a single-mode gain optical fiber; temperature tuning negative chirp introduction is carried out, a chirp fiber grating is packaged in a temperature tuning device, and the temperature of a semiconductor chilling plate is linearly increased within a preset range, so that the second-order dispersion amount of the chirp fiber grating is changed, and controllable negative chirp is introduced into a pulse; carrying out nonlinear amplification and spectrum broadening, inputting the pulse introduced with the negative chirp into a multimode gain fiber, injecting pumping energy into the multimode gain fiber, and broadening the pulse spectrum width to be greater than a preset width by utilizing the synergistic effect of self-phase modulation, dispersion and gain; pulse width compression is carried out, and the pulse after spectrum broadening is adjusted through a transmission-type grating pair compressor, so that the ultra-narrow pulse width is obtained.

The application discloses a kind of ultrafast laser generation device.The device includes Yb-doped femtosecond laser light source, first focusing lens, first optical window, first energy transfer device, first level hollow capillary fiber, second optical window, concave mirror, half-wave plate, wire grid polarizer, second focusing lens, third optical window, first gas chamber, second level hollow anti-resonant fiber, second gas chamber, fourth optical window, 90° off-axis parabolic mirror, frequency-resolved optical gating pulse measurement device.By changing the inert gas type and air pressure in the first level hollow capillary fiber, the incident pulse spectrum is broadened using self-phase modulation effect;Then, the second level hollow anti-resonant fiber is filled with inert gas to generate air pressure gradient, and finally realizes flexible transmission of sub-20 fs ultrafast laser using soliton self-compression effect.

The application relates to the technical field of discharge signal collection, in particular to a high-voltage cable partial discharge signal synchronous collection method and system, which comprises the following steps: based on a multi-channel high-speed double-ADC architecture, synchronously collecting ground loop current signals and high-frequency current signals in the operation process of a high-voltage cable; calculating pulse frequency spectrum consistency and mutation phase fluctuation to obtain a discharge loop current abnormality; determining the pulse periodicity of the high-frequency current signals; extracting harmonic frequency parameters and energy attenuation parameters of the high-frequency current signals, calculating a harmonic abnormality, combining the pulse periodicity to obtain a pulse harmonic abnormality factor; performing weighted summation on the discharge loop current abnormality and the pulse harmonic abnormality factor to evaluate the reliability of the synchronously collected signals, and outputting a synchronous collection result of the high-voltage cable partial discharge. Therefore, the accuracy of the synchronous collection of the partial discharge signals is improved.

The present invention discloses a dispersion measurement method for a high-power laser system, which relates to the fields of optical device measurement technology and laser technology. The method is based on the spectrum shaping of ultrashort pulse lasers, and obtains laser pulses with fingerprint spectrum structure and conversion limit pulse width by designing a special spectrum response curve. According to the frequency-time mapping principle, after the laser pulse with fingerprint spectrum structure is transmitted through a dispersive medium (object to be measured), the frequency domain distribution (i.e., spectrum) of the laser pulse will be mapped to the time domain, presenting a state in which the frequency domain distribution corresponds to the time domain waveform. By measuring the information such as the spectrum and time domain waveform of the laser pulse after the dispersion component is connected, and fitting and data analysis and processing with the dispersion model of Taylor expansion, the dispersion measurement of each component in the high-power laser system, such as a stretcher, a compressor, etc., is realized. The method constructs a fingerprint spectrum with a special structure for measurement, which can not only realize the rapid and precise diagnosis of the dispersion of the high-power laser system, obtain the deconstruction of high-order dispersion, but also reduce the statistical fluctuation of the data and the uncertainty of the measurement by increasing the sampling data points, and improve the accuracy of the dispersion measurement.

The application discloses a kind of numerical simulation method and system of saturable absorber mode-locked fiber laser, method includes the following steps: setting simulation parameter;Input a noise pulse as the initial pulse of simulation system;The numerical solution of nonlinear Schrödinger equation is calculated by improved step-by-step Fourier method, and the evolution result that pulse is transmitted in optical fiber is obtained;The shaping effect of saturable absorber to pulse is simulated using the transmissivity function of saturable absorber;Coupler solver redistributes the energy of pulse;Post-processing module saves the data when pulse stops running, and it is drawn into the curve graph and three-dimensional graph of pulse shape and pulse spectrum.The simulation method and system disclosed in the application can solve the problem of low calculation precision of dispersion term in fiber laser simulation, greatly improve the simulation accuracy, and can more accurately predict the output characteristics of mode-locked fiber laser.

The application relates to the technical field of communication interference elimination, in particular to a pulse interference elimination method for a power carrier communication chip, which comprises the following steps: acquiring carrier signals of each communication node in a power carrier communication network and the length of a power line between any two communication nodes; acquiring suspected pulse noise points; calculating pulse noise weights of the suspected pulse noise points; intercepting each suspected pulse signal in the carrier signal; obtaining a pulse noise spectrum diagram of each communication node; calculating line loss ratios between any two communication nodes; obtaining a comprehensive pulse spectrum diagram of each communication node; calculating an attenuation ratio of each frequency position; obtaining a noise suppression spectrum diagram; and obtaining a carrier signal after noise suppression based on the noise suppression spectrum diagram, so as to eliminate pulse interference in the carrier signal. The application dynamically filters the frequency domain characteristics of the carrier signal, and improves the communication quality of the power carrier communication chip.

The invention provides a near-fault seismic motion vector type intensity index construction method, and belongs to the technical field of structural toughness anti-seismic analysis, and the method comprises the steps: calculating a value of an ideal speed pulse signal acceleration response spectrum at a structural basic period under a 5% damping ratio, and taking the value as a near-fault seismic motion speed pulse spectrum characteristic representation parameter; calculating the normalized total speed pulse duration, and representing the influence of the multi-speed pulse generation time process on the low-cycle fatigue damage of the structure; the two parameters are combined into a vector, namely the near-fault multi-speed pulse record vector type intensity index. According to the method, the structure dynamic response is directly associated with the velocity pulse frequency spectrum characteristic, meanwhile, the pulse generation time process parameters are introduced for the first time, the structure fatigue damage is associated with the velocity pulse generation process in the seismic oscillation, the near-fault multi-velocity pulse seismic oscillation intensity can be effectively represented, and the accuracy of the seismic oscillation intensity is improved. And the influence on the seismic response of the structure can be measured more accurately.

This invention relates to a method for measuring the neutron energy spectrum of a multi-sphere neutron spectrometer based on pulse spectrum segmented response. It simulates the pulse spectrum response of a single-energy neutron incident multi-sphere spectrometer, segments it according to different energy ranges, and obtains a new response matrix. Then, it segments the measurement results Y of the multi-sphere spectrometer according to the same energy range to obtain n corresponding segmented measurement results Y1, Y2, ..., Y... n Let k1, k2, ..., k be the numbers respectively. n 1-dimensional vectors, combine them into a k1+k2+…+k n The new vector of the measurement results is used to solve for the neutron energy spectrum X according to the formula. Using the method disclosed in this invention, the response of a multi-sphere neutron spectrometer is simulated and statistically analyzed across energy ranges, and the measurement results of the multi-sphere neutron spectrometer are processed. Without increasing the number of spheres in the multi-sphere neutron spectrometer, more linearly independent equations are obtained, resulting in richer energy spectrum information. This improves the reliability and accuracy of solving the neutron energy spectrum without incurring additional costs.

The present invention discloses a femtosecond laser chirped pulse self-similar regenerative amplification method and device. The device includes a broadband seed source, a spectral shaping and broadening device, a self-similar regenerative amplifier, and a pulse compressor that are sequentially arranged from one side to the other side according to the optical path. The spectral shaping and broadening device includes a time-domain broadening device and a spectral shaper. The time-domain broadening device is used to broaden the seed pulse to the picosecond level or even the nanosecond level and finely regulate the pulse width. The spectral shaper is used to perform spectral shaping on the seed pulse so that the spectral intensity of the broadened seed pulse is a saddle-shaped chirped pulse with high intensity at both sides and low intensity in the center. The self-similar regenerative amplifier includes a gain crystal and a highly nonlinear crystal. After the saddle-shaped chirped pulse is injected into the self-similar regenerative amplifier, it undergoes nonlinear spectral broadening and amplification multiple times back and forth and outputs a high-energy chirped pulse to the pulse compressor.

This invention discloses a tunable saddle-shaped spectrum generation device and method, belonging to the field of precision machining. It includes: a pump source, a resonant cavity with overall positive dispersion, a mode-locking device, a dispersion management device, and a spectral adjustment component. The pump source excites a gain fiber to generate laser light. The mode-locking device outputs a mode-locked pulse, and the dispersion management device provides positive dispersion. Working in conjunction with the nonlinear effect of self-phase modulation within the cavity, the mode-locked pulse spectrum is directly shaped into a saddle-shaped spectrum with a central depression. The spectral adjustment component achieves flexible tuning of the center wavelength and bandwidth of the output spectrum by adjusting the relative positions of the diffraction grating and the fiber collimator. This invention actively generates a tunable saddle-shaped spectrum from the source, eliminating the need for complex modulation elements in the amplification link. It allows for precise pre-compensation of the gain characteristics of subsequent amplifiers, effectively suppressing gain narrowing effects. It has the advantages of compact structure, low cost, high stability, and high energy utilization.

The invention relates to a multi-pulse spectral interference optical frequency comb distance measuring device and method, and the device comprises two Michelson interferometers, light emitted by an optical frequency comb is divided into two beams through a beam splitter, and the reflected light is reflected by a reference reflector through the beam splitter to serve as reference light; and the light transmitted by the beam splitter is reflected by the semi-transparent and semi-reflective mirror and the measurement reflector in sequence to serve as two pieces of measurement light. The reference light and the two measuring light can interfere with each other, a generated multi-pulse spectrum interference signal is detected and received by a spectrograph, the group refractive index and the distance measurement result in a measuring light path are synchronously determined by using phase information in the multi-pulse spectrum interference signal, the distance measurement result is compensated by using the group refractive index measured in real time, and the distance measurement result is obtained. The distance measurement precision of nanometer magnitude is ensured, and the measured distance can be expanded to any length from the non-fuzzy range of spectral interference distance measurement through fine tuning of the repetition frequency and differential calculation. The method is simple and reliable, and can realize wide-range high-precision absolute distance measurement.

The invention provides a pulse spectrum synthesis system and method, and relates to the field of spectrum synthesis. The pulse fiber laser sub-beam comprises a pulse seed source used for outputting pulse laser as signal light; the continuous seed source is used for outputting continuous laser as reference light, the wavelength of the reference light is different from that of the center pulse of the signal light, and the average power of the reference light is smaller than that of the signal light; the wavelength division multiplexer is respectively connected with the pulse seed source and the continuous seed source and is used for synthesizing the signal light and the reference light into one path as synthesized light; and the signal amplifier is connected with the wavelength division multiplexer and is used for amplifying the signal light and the reference light to form amplified synthetic light. Reference continuous light is coupled into the amplifier through the optical coupler, so that amplification of continuous components of signal light is restrained, the number of upper-energy-level particles is consumed, ASE is restrained, the signal-to-noise ratio of laser output is increased, and the efficiency of the laser is improved.

The invention discloses a visual interaction method for splicing processors, and relates to the technical field of man-machine interaction, and the method comprises the steps: tracking a user iris motion track in real time, determining a processor in a current view cone focus region, and marking a processor in a non-focus region outside the view cone focus region; when the node position similarity exceeds a preset verification threshold value, triggering a configuration change command corresponding to execution of the prediction instruction to a marked non-focus area processor; new load data generated by the configuration change command after execution are collected in real time, whether the new load data exceed the preset load threshold value or not is judged again, and a dynamic monitoring and interactive closed loop is formed. According to the method, the pulse spectrum is projected to the peripheral visual field of the retina of a user, a non-intrusive optical signal is formed in the peripheral visual field of the retina by using the infrared spectrum, and the load alarm is transmitted on the premise of not interfering central focus processing of cone cells by using the high sensitivity of the rod cells to a dynamic light source.

The invention discloses a wireless terminal positioning method and system. The method comprises the steps of data acquisition, feature extraction and error correction, environment perception recognition model establishment, positioning coordinate registration, multi-factor fusion and position positioning presentation. The invention belongs to the technical field of positioning, and particularly relates to a wireless terminal positioning method and system. According to the scheme, through color feature analysis, neighborhood averaging method smoothing and feature extraction based on a color space model, pulse spectrum features are adopted as measurement of a tracking algorithm, and an environment perception recognition model is established; adaptive virtual positioning is generated by changing parameters such as positions, radiuses and curvatures of nodes, and different factors in the environment are perceived and identified by constructing position codes and designing a similarity measurement function, so that interference in a complex environment can be dealt with, the stability, robustness, adaptability and real-time performance of a positioning result are improved, and the positioning accuracy is improved. The method is suitable for positioning requirements of various different scenes.

The application discloses a kind of based on time-frequency chart's graph signal detection method, terminal equipment and storage medium, the method includes the following steps: obtaining signal time-frequency chart, Fourier transform is carried out after filtering and binarization to it in time direction, the maximum value position of each column is counted and clustered, and the class with bandwidth is too narrow and the column discontinuous in class is removed;The corresponding column of each class is summed in frequency direction to obtain pulse envelope, and then the start and end column of the pulse spectrum envelope corresponding to each class is obtained, which is compared with the start and end column of each class after clustering, to find the class with the smallest error;Iterate until the error of current calculation result and previous calculation result tends to be stable, then determine the frequency band of stable result, that is, whether the signal is the target signal can be judged.The application is applied to communication technology and electronic countermeasure field, not only less calculation, and high-precision detection can be carried out on graph signal under low signal-to-noise ratio condition, but also can filter out part of interference signal, false alarm rate is lower.

The application provides a pulse spectrum classification-based converter valve thyristor fault identification method and system, which comprises the following steps: according to the design parameters of the converter valve in the actual project, a simulation model of a six-pulse thyristor converter valve is built; the size of the damping capacitor and the turn-off equivalent resistor in the simulation model is changed to simulate the fault condition of the thyristor stage, the return signal time sequence parameters of the thyristor stage under various normal or fault working conditions are collected, and the pulse spectrum of the thyristor return signal is made; the pulse spectrum data is analyzed, the pulse spectrum formed by the return signal sequence is made, and the input and output sample data set of the convolutional neural network model is used; the trained convolutional neural network model is used for the parameter monitoring of the actual project converter valve thyristor stage, the measured voltage data, current data and return signal pulse spectrum are taken as the input, and the working state of the thyristor stage is solved and obtained.

The application discloses a wireless terminal positioning method and system, and the method comprises data acquisition, feature extraction and error correction, environment sensing knowledge recognition model establishment, positioning coordinate registration, multi-factor fusion and position positioning presentation. The application belongs to the technical field of positioning, and specifically relates to a wireless terminal positioning method and system. The scheme is characterized in that color feature analysis, neighborhood average method smoothing and feature extraction based on a color space model are adopted, pulse spectrum features are used as measurements of a tracking algorithm, an environment sensing knowledge recognition model is established, adaptive virtual positioning is generated by changing the position, radius, curvature and other parameters of a node, different factors in the environment are sensed and recognized by constructing a position code and designing a similarity measurement function, interference in a complex environment can be coped with, and the stability, robustness, adaptability and real-time performance of a positioning result are improved, and the application is suitable for positioning requirements in various different scenes.

A real-time measurement method and apparatus for long-wave infrared pulse spectra based on nonlinear frequency upconversion is disclosed. The method utilizes a non-oxide semiconductor crystal as the nonlinear medium and employs a narrowband pulse with a center wavelength in the range of 2-2.5 μm as the sampling light. This pulse is summed with the long-wave infrared pulse to be measured, and the resulting summed pulse is received and detected by a near-infrared real-time spectrometer. The combination of the selected sampling light wavelength and the selected crystal generates an ultra-wide phase-matching bandwidth. Through a linear frequency mapping relationship, the spectrum of the long-wave infrared pulse to be measured can be inverted from the detected summed pulse spectrum. By analyzing the spectrum acquired by the near-infrared spectrometer in real time, the spectrum of the long-wave infrared pulse to be measured can be directly and in real-time reconstructed. This invention overcomes the limitations of Fourier transform spectrometers and traditional grating spectrometers in real-time measurement, achieving real-time, mechanical-scan-free measurement of long-wave infrared pulse spectra without requiring a specific repetition frequency for the long-wave infrared pulse.

The present invention provides a pulse arc spectrum component measurement device and method based on an adjustable sliding window, which relates to the technical field of pulse arc spectrum analysis. The device mainly includes a pulse arc oscillation generation circuit, a spectrometer and a trigger control system; the pulse arc oscillation generation circuit includes a pulse energy circuit, an arc ignition circuit, an absorption protection circuit, a pulse spectrum emission source and a timing control system. This scheme can realize the single-cycle accurate capture and measurement of the pulse arc; the opening time and window length of the sliding window can be flexibly adjusted; the strong current side of the pulse arc can be effectively isolated from the weak current side of the spectrum control and collection, and the host computer system and the spectrometer can be effectively insulated and protected; error correction can be performed to effectively eliminate the influence of the background light source and the noise current of the working circuit.

The application provides a multi-pass cell structure light pulse spectrum shape consistency regulation compression method and system. The method makes the structure light pulse multiple round trip propagation in the multi-pass cell and realizes the spectrum broadening dominated by self-phase modulation through the nonlinear medium, carries out spatial-spectrum interference measurement on the measured light after the spectrum broadening of the multi-pass cell and the dispersion compensation, restores the wavelength resolution spatial complex light field data, and establishes the evaluation index for representing the spectrum shape spatial consistency with the spectrum overlap index V. According to the evaluation index, the input structure light parameters, the multi-pass cell propagation parameters and the dispersion compensation parameters are feedback adjusted, so that the quantitative evaluation and optimization control of the structure light pulse spectrum broadening process and the compression output quality are realized, and the output pulse with the target spectrum width, the higher spectrum shape spatial consistency, the good compressibility and the higher peak power is obtained.

The invention relates to a device (1) for characterizing the spectral phase of at least one single photon of a signal (5), comprising a first light source (2) for generating at least one pump pulse (3) with a pump pulse spectrum, a supply line (4') for a second light source (4) for supplying at least one signal pulse (5) with a signal pulse spectrum, a pulse shaper (6) for shaping the pump pulse (3) in such a way that two phase-different spectral frequency bins (12) of the pump pulse (3) are transmitted with an adjustable frequency, a mixing device (7) for mixing the shaped pump pulse (3) with the signal pulse (5) and outputting at least one first part (8) of the signal pulse spectrum, with the first part (8) comprising an overlap (11) of a frequency component of the signal pulse spectrum with the adjustable frequency of the pump pulse (3), a measuring unit (9) for measuring the intensity of the first part (8) of the signal pulse spectrum and coding a second part of the signal pulse spectrum, with the second part comprising the overlap (11) of the signal pulse spectrum shifted by a predetermined offset and the pump pulse spectrum, and an evaluation unit (10) for reconstructing at least one phase and / or one coherence property of the signal pulse (5). In this way, a simple, fast and reliable characterization of the spectral phase and coherence properties of at least one single photon light pulse is made possible.

The application discloses a frequency optimization method and device based on spectrum sensing, and belongs to the field of wireless communication, which comprises the following steps: firstly, starting the spectrum sensing function before the beginning of the current receiving time slot; continuously performing frequency configuration during the spectrum sensing process; after the frequency configuration, sampling and mixing the radio frequency signal corresponding to the current frequency, and performing low-pass filtering to output the baseband signal; calculating the average power of the baseband signal in the time domain, calculating the fast Fourier transform in the frequency domain, and then taking the modulus and searching the peak value to complete the spectrum sensing calculation in the time-frequency two dimensions; finally, according to the sensing calculation result of the time-frequency, configuring the subsequent frequency, and performing the frequency optimization according to the optimization strategy to output the final optimized frequency. The application does not occupy the system bandwidth, does not depend on the prediction and cooperation among nodes, and only needs the receiving node to complete the synchronous pulse spectrum sensing and frequency optimization with a low calculation amount, so that the frequency domain interference is avoided, and the synchronization capability is improved.

The invention discloses a microwave photon enhancement device for transient weak pulse spectrum sensing and a sensing method. The microwave photon enhancement device comprises an electro-optical modulation module, a first transient pulse replication branch, a second transient pulse replication branch and an autocorrelation detection module. A to-be-measured signal forms a first carrier signal at the electro-optical modulation module modulating the carrier light source; the first pulse copy loop copies the first carrier signal to form a first pulse stream signal; the second pulse copy loop copies the first carrier signal, and forms a second pulse stream signal after passing through the optical delayer; the self-correlation detection module carries out self-correlation operation on the first pulse flow signal and the second pulse flow signal. According to the microwave photon enhancement device for transient weak pulse spectrum sensing and the sensing method, the pulse replication loop is adopted to perform periodic replication on transient extremely narrow pulses, instantaneous self-correlation operation of a radio frequency domain of an analog signal to be detected is realized through the microwave photon link, the signal-to-noise ratio of the signal to be detected is improved, and the sensitivity of an instantaneous frequency measurement system is improved.

A transmitter includes a first circuit to generate multiphase pulses, and a second circuit to mix a set of in-phase (I) data and quadrature (Q) data with the multiphase pulses and to generate an output radiofrequency (RF) signal. The multiple pulses include multiple I pulses and multiple Q pulses each comprising a pulse that includes a duty cycle such that a first null appears at a third harmonic frequency in a frequency spectrum of the pulse.

The present invention discloses a method, device, electronic device, and storage medium for spectral parameter partitioning. The method includes: obtaining each spectral parameter of the current carbon load spectral map, and determining the number of road spectrum data corresponding to each spectral parameter; determining the number of partitions for spectral partitioning the spectral parameters, and determining the partition boundary parameters of each spectral partition based on the number of partitions and the number of road spectrum data; determining the target spectral partition of the spectral parameter based on the partition boundary parameters; wherein the target spectral partition is used to correct the spectral parameters of the current carbon load spectral map. Through the technical solution disclosed in the present invention, the calibration result of the carbon load is improved, thereby improving the model accuracy of the carbon load estimation model, and further improving the accuracy of the carbon load estimation result.