283 results about "Pulse shaping" patented technology

An ultra-wideband (UWB) signal transmission method includes that a plurality of initiators simultaneously sends a UWB signal. A UWB signal sent by any initiator is obtained by performing pulse shaping and modulation on a first sequence. The first sequence is obtained by performing a cyclic shift on a second sequence, and a number of cyclic shift bits is determined based on a shift factor and a step size of the cyclic shift that are of the any initiator. A responder determines time of arrival of the plurality of UWB signals based on the plurality of received UWB signals and the second sequence.

Methods and apparatus related to pulse shaped and overlapped reference signals are disclosed. Signaling that indicates information associated with a length of a base sequence and a length of a cyclic rotation is communicated between a first communication device and a second communication device in a wireless communication network. A DMRS is also communicated in the wireless communication network. The DMRS comprises a DMRS sequence of a target length, and the DMRS sequence comprises the base sequence cyclically rotated by the length of the cyclic rotation. Cyclic extension is also applied a base sequence in some embodiments.

An apparatus and method are provided to correct for time-walk errors during photon detections (e.g., detecting gamma rays). A time-walk correction is determined using measurements of energy (or charge) that apply different time windows, enabling corrections accounting for variations in the ratio between fast and slow components in the detected pulse. For example, one time window can be used to integrate the leading end of the pulse, thereby predominantly measuring the fast component, while a second window is used to integrate a trailing end of the pulse to predominantly measure the slow component. Alternatively or additionally, low-pass and high-pass filters may select the slow and fast components, respectively. The time-walk correction is a function of multiple measurements representing different components (e.g., fast and slow) of the pulse shape.

The invention belongs to the technical field of laser pulse modulation, and particularly relates to an ultrafast laser multi-pulse sequence preparation device and method. According to the invention, ultrafast pulse laser is divided into a transmission light path and a reflection light path through a beam splitter, a spatial light modulator is utilized to perform programming control on a target pulse in the transmission light path, and amplitude and pulse width parameters can be controlled while multiple pulse strings are generated; and the light path of the reflection light path is controlled through the high-precision one-dimensional displacement table, so that the time delay of a reflection light path pulse relative to a transmission light path pulse is controlled. And after the reflected light path and the transmission path subjected to pulse shaping are combined again, a periodic pulse string sequence with controllable time delay, pulse number, pulse width parameter and pulse intensity is realized. The problem that high-precision multi-pulse dynamic programming cannot be achieved through a traditional adjusting mode is solved, and the problems that in the prior art, the number of excitation pulses and pulse width parameters cannot be controlled at the same time, and an ordered periodic pulse sequence cannot be generated are solved.

The invention provides a detector signal processing circuit and a detector signal processing method, which are applied to the field of nuclear technology application, and the detector signal processing circuit comprises a detector used for generating a detection signal; the pulse mode circuit is connected with the detector and is used for performing pulse shaping on the detection signal to obtain a pulse signal; the high-order mode circuit comprises a plurality of Campbell modules connected in parallel, the input ends of the Campbell modules are connected with the detector, and the Campbell modules are used for converting detection signals into first-order signals; the current mode circuit is connected with the detector; the current module is used for converting a detection signal into a current signal; the control module is connected with the pulse mode circuit, the current mode circuit and the output end of each Campbell module. According to the embodiment of the invention, the accuracy of a neutron flux detection result can be improved, and the measurement range of the detector is expanded.

Methods and apparatuses for PAPR reduction based on a pulse shaping operation in a wireless communication system. A method of operating a UE includes: converting, using a DFT, a modulated block of data symbols to a first symbol block in a frequency domain; extending, based on a spectral extension ratio associated with extended subcarriers (Nse), the first symbol block to a second symbol block with a length that is identified based on a number of scheduled subcarriers (NSC), wherein the second symbol block is symmetrically extended DFT symbol block; generating, using an FDSS filter with a number of tap values (NP), third symbol block based on the second symbol block that is symmetrically extended DFT symbol block; mapping the generated third symbol block to the NSC; generating, based on the mapped third symbol block, OFDM symbols in a time domain using an IFFT; and transmitting, to a BS, signals including the OFDM symbols.

The present invention relates to a single photon avalanche diodes-based time-of-flight sensor (100). The single photon avalanche diodes (SPADs) based time-of-flight (ToF) sensor (100) includes an Nx N single photon avalanche diode (SPAD) photodetector (101), a front-end (FE) unit (103), a pulse shaping (PS) unit (105), a pulse store unit (107), a peak detection unit (109), a digital logic unit (111), a timing processing circuitry unit (113), and memory elements unit (115). Due to integration of multiple units in single photon avalanche diodes (SPADs) based time-of-flight (ToF) sensor (100), the single photon avalanche diodes-based time-of-flight (ToF) sensor (100) accurately measures distance by adequate, suitable, and efficient elimination of background light.

The invention discloses a system and method for generating, regulating and controlling a partially coherent space-time light field. The system comprises a pulse shaping assembly composed of a plurality of optical elements and an incident light source used for providing a completely coherent ultrafast pulse light field. An optical element in the pulse shaping assembly comprises a first blazed grating, a first cylindrical lens, a two-dimensional dynamic holographic modulator, a second cylindrical lens and a second blazed grating which are sequentially arranged in the light field propagation direction. The focal lengths of the first cylindrical lens and the second cylindrical lens are the same, and the distance between the adjacent optical elements is equal to the focal lengths of the first cylindrical lens and the second cylindrical lens; the two-dimensional dynamic holographic modulator is used for loading a specific complex amplitude modulation function to reconstruct the spatial-spectral characteristics of the light field. According to the invention, the two-dimensional space-spectrum function of the pulse is dynamically modulated, the generation of the partially coherent space-time wave packet is realized, and the amplitude and structure distribution of the space-time coherence can be designed and regulated as required.

Systems and methods are described for generating and implementing pulse-shaping filters for efficient utilization of limited spectral resources in wireless communication systems. Wireless communication systems operating at high spectral efficiency conventionally use pulse shaping filters that rely on Nyquist waveforms for good main lobe performance with low inter-symbol interference (ISI) power. Conventional uses of non-Nyquist waveforms typically involve an orthogonalization process to convert those non-Nyquist waveforms to Nyquist waveforms for ISI free performance. Embodiments of pulse shaping filters described herein generate a non-Nyquist partial response (NNPR) transmit filter and / or matched receive filter based on applying a tunable second-weighted orthogonalization to a tunable first-weighted non-Nyquist waveform to obtain a pulse-shaping waveform with parametric control over throughput and power penalty.

Aspects presented herein provide a low PAPR waveform design based on resource spreading, pulse shaping, and / or dynamic MCS configuration, such that a transmitting wireless device may set IBO of its PA closer to the saturation point of the PA to enhance the PA efficiency. In one aspect, a first network node receives waveform information from a second network node, where the waveform information includes at least one of: one or more first parameters associated with a first waveform type or one or more second parameters associated with a second waveform type. The first network node processes data based on the one or more first parameters associated with the first waveform type or the one or more second parameters associated with the second waveform type. The first network node transmits a waveform based on the processed data, where the waveform is the first waveform type or the second waveform type.

The invention provides a phase-sensitive optical time domain reflectometer system and method, and the system comprises a first polarization-maintaining coupler which is used for dividing laser generated by a DC laser, and obtaining first laser and second laser; the optical fiber measurement front-end module is used for processing the random signal through pulse shaping and multi-carrier modulation technologies to generate an electric signal, and sequentially performing modulation, amplification, Rayleigh scattering and amplification on the first laser after the electric signal is generated to obtain amplified Rayleigh backscattered light; the second polarization-maintaining coupler is used for dividing the second laser to obtain third laser and local oscillation light; the delay optical fiber is used for processing the third laser to obtain delay light; the third polarization-maintaining coupler is used for combining the delayed light and the amplified Rayleigh backscattered light to obtain combined light; the receiver is used for processing the combined light and the local oscillation light to obtain multiple paths of target electric signals; and the oscilloscope is used for processing multiple paths of target electric signals through low-pass and high-pass filters and a phase noise compensation algorithm so as to determine power and phase distribution. The system cost can be reduced.

The invention relates to the technical field of power system state monitoring, and discloses an insulator defect detection method and device and a storage medium, and the method comprises the steps: collecting the leakage current of an insulator, and constructing a polarity conduction screening model through power frequency phase information, so as to generate a composite current sequence which highlights the polarization attribute of an interface; analyzing the nonlinear degree of the attenuation rate of the sequence drifting along with evolution time in a multi-stage diffusion evolution time domain, and generating an interface electrochemical mass transfer composite index; utilizing the index to invert and construct an interface polarization background reference and stripping the interface polarization background reference from the composite current sequence so as to extract an abnormal discharge pulse residual error; and finally, quantizing the pulse form distortion degree of the residual error, and performing suppression normalization operation on the distortion degree by using the index to output a judgment result. According to the invention, the interference of the interface mass transfer process is effectively eliminated, and the specific detection of the pollution flashover hidden danger is realized.

The invention discloses a variable rate signal generation method suitable for a satellite communication system, which comprises the following steps: receiving a system master clock, and generating a frequency division signal; performing modulation data generation based on the divided signal and the predictive data request signal; carrying out interpolation and pulse shaping on the modulation data, and carrying out adaptive sampling rate multiplication processing; continuous accurate speed conversion of the phase is realized through a phase perception interpolation function; and optimizing cache resource allocation by using a Markov decision process. According to the method, the variable symbol rate signal is generated under the condition of a fixed D / A sampling rate, the key problems of spectrum fidelity, phase continuity, cache optimization, load prediction and the like are solved, and the resource utilization efficiency and the service quality of a satellite communication system are improved.

The invention discloses a traditional Chinese medicine pulse diagnosis instrument based on multi-modal analysis and a detection method thereof.The device is composed of a shell, a master controller and three sets of pulse diagnosis components used for the cun pulse position, the guan pulse position and the chi pulse position, and each pulse diagnosis component integrates an air path sensing module, an optical sensing module and a pressure sensing module; through cooperative work of the pneumatic piston, the liquid annular bag, the thin film pressure sensor and the optical sensor, accurate collection of pulse signals is completed. The system has the automatic locating and fitting function of three-dimensional linkage of the y axis, the theta axis and the z axis, intelligent locating and layered pressurization of wrist pulse positions can be achieved, and the pulse taking manipulation of'lifting, pressing and searching 'of traditional Chinese medicine is simulated. The device synchronously obtains multi-mode signals such as pulse position, pulse rate, pulse law, pulse shape and pulse potential, and after general control filtering, correction and fusion algorithm processing, a standardized feature matrix is formed and input into a multi-mode fusion model for pulse condition classification and automatic dialectical analysis. According to the device, a visual analysis result is generated based on pulse condition characteristics in combination with eight-line syndrome differentiation and viscera syndrome differentiation.

The utility model discloses a wide-field Fourier transform hyperspectral imaging device and system, and the device comprises a microscope assembly which is disposed at one side of an imaging sample, and is used for carrying out the focusing amplification imaging of the imaging sample, and then outputting corresponding first signal light; the input end of the pulse shaping assembly is arranged corresponding to the output light path of the microscope assembly, and the pulse shaping assembly is used for modulating and shaping the first signal light output by the microscope assembly and then outputting an interference signal of the whole imaging sample; the input end of the imaging detection assembly is arranged corresponding to the output light path of the pulse shaping assembly, and the imaging detection assembly is used for focusing, imaging and detecting the interference signals, output by the pulse shaping assembly, of the imaging sample at different spatial positions, converting the interference signals into a plurality of electric signals and outputting the electric signals. The utility model aims to improve the scanning speed of the imaging sample.

The present invention discloses a method for forming a secondary edge-shaped flat-top pulse, which is used to perform secondary edge-shaped flat-top pulse shaping on the high-order pulse signal output by the front-end analog system of a nuclear radiation detector. Starting from the decomposition of the system function and combining the progressive construction process of the pulse signal in the time domain and the z domain, this method overcomes the limitations of previous pulse shaping based on low-order typical pulse signals, which ignores the "high-order" and "complex" nature of the physical system. The rich characteristics of the formed secondary edge-shaped flat-top pulse are beneficial to the adoption of high-performance analysis algorithms (such as deep learning, etc.) in pulse recognition and overlapping pulse decomposition, and are conducive to greatly improving the accuracy of energy spectrum measurement.

The invention discloses a radar communication integrated waveform design method based on an OFDM (Orthogonal Frequency Division Multiplexing) signal. The method comprises the following steps that: a transmitting end completes constellation mapping on transmitted communication information, performs ZCT matrix reconstruction, performs serial-parallel conversion on reconstructed communication data, performs spectrum shaping on an integrated signal by adopting an improved Nyquist pulse, and transmits the integrated signal to a receiving end; and then IFFT processing, parallel-to-serial conversion, cyclic prefix addition, digital-to-analog conversion and up-conversion are carried out on the shaped data, and finally integrated waveform emission is completed. And the receiving end performs down-conversion, analog-to-digital conversion and cyclic prefix removal operation on the received signal. In the communication function, serial-to-parallel conversion, FFT processing, inverse pulse shaping, parallel-to-serial conversion, ZC matrix reconstruction solution and inverse mapping are carried out on the data without the cyclic prefix to obtain communication information. In the radar detection function, radar signal processing is performed on data without cyclic prefixes. According to the method, the correlation of OFDM integrated signals can be effectively optimized, the modulation characteristic of communication information is improved, the influence of the communication information on a fuzzy function is reduced, OFDM symbols have better correlation, meanwhile, the peak-to-average power ratio of the system is effectively reduced through pulse shaping, implementation is easy, and the comprehensive performance of the system can be remarkably improved.

The utility model belongs to servo driver technical field especially relates to a kind of servo driver non-polarity pulse input filter circuit, the circuit is by pulse input module, isolation and level conversion module, primary pulse shaping logic flip module, primary filter module, secondary controllable filter module, secondary pulse shaping logic flip module and MCU pulse collection and filter control module constitute, the utility model is by being arranged bridge rectifier circuit to make circuit not limit the polarity of signal input, reach the effect of arbitrary polarity input.

The invention relates to a spread spectrum underwater acoustic communication coding and decoding method, which comprises the following steps of: performing dual-channel coding modulation, sequentially performing CRC (cyclic redundancy check) coding, serial-parallel conversion, multi-system error correction coding and interleaving operation on an information bit stream at a transmitting end, then performing spread spectrum modulation on a code element by using a pseudorandom sequence, and finally mapping modulation output of an I channel and a Q channel into a baseband signal, and a spread spectrum underwater acoustic communication signal is formed through pulse shaping and up-conversion processing. According to the method, the communication accuracy is improved through a dual-channel incoherent and coherent redundancy decoding mode and an opportunity cross validation decoding mode.

A high voltage pulse power delivery system is provided that includes dedicated security features including fault detection and fault management. In addition to a normal communication cable, the pulsed power delivery system can provide remote power through a standard multi-conductor cable without dedicated conduits or isolation. This simplifies the installation of the device, increases the overall deployment speed, and significantly reduces the deployment cost. The pulsed power delivery system is further configured to transmit power through the pulsed current waveform.

Quantum circuit assemblies that employ active pulse shaping in order to be able to control states of a plurality of qubits with signal pulses propagated over a shared signal propagation channel are disclosed. An example quantum circuit assembly includes a quantum circuit component that includes a first qubit, associated with a first frequency to control the state of the first qubit, and a second qubit, associated with a second frequency to control the state of the second qubit. A shared transmission channel is coupled to the first and second qubits. The assembly further includes a signal pulse generation circuit, configured to generate a signal pulse to be propagated over the shared transmission channel to control the state of the first qubit, where the signal pulse has a center frequency at the first frequency, a bandwidth that includes the second frequency, and a notch at the second frequency.

The invention discloses a construction method of a non-acceleration PST Airy wave packet, and relates to the technical field of non-diffraction beams. The method comprises the following steps: defining Lorentz acceleration of a light beam in a PST domain; lorentz acceleration is applied to the light beam of the PST domain parabola-shaped frequency spectrum; superposing a cubic phase on the parabolic frequency spectrum of the PST domain; a non-acceleration PST Airy wave packet is generated by using a complex amplitude modulation method based on a spatial light modulator. Compared with a space-time light pulse scheme needing a pulse laser source, a 4f pulse shaping system and a complex field scanning device, the method achieves efficient generation of the wave packet through simplified configuration.

The application discloses a kind of pulse shaping method and system of nuclear signal, belong to signal processing technical field, for the problems of existing pulse signal width in prior art Widening, thereby increasing the accumulation event, and there is no better anti-noise effect to Gaussian white noise, the present application includes: the output signal of detector is acquired, and output signal is structured into digital function signal;The Z transform is carried out after the discrete of the digital function signal, and output Z transform signal is obtained;Definition input signal is exponential signal, and the Z transform is carried out to the exponential signal, and input Z transform signal is obtained;According to the input Z transform signal and the output Z transform signal, the transfer function of input signal pulse shaping is obtained;The inverse Z transform is carried out to the transfer function, and the pulse shaping signal of input signal is obtained, and its time domain expression.The purpose is: the pulse shaping signal obtained has better signal-to-noise ratio, and it is convenient to obtain amplitude.

A method and apparatus for wireless communication and storage medium are provided. The apparatus includes at least one processor; and memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: determine a guard band width associated with a symbol based on information about resource allocation to the apparatus; set a pulse-shaping parameter associated with the symbol based on the guard band width; and output the symbol having a waveform based on the pulse-shaping parameter.

The invention provides a cascaded J-class radio frequency power amplifier circuit with a pulse shaping function. The cascaded J-class radio frequency power amplifier circuit comprises an input matching circuit, a harmonic pulse control matching circuit, a J-class output matching circuit and a phase detection compensation circuit, the input matching circuit is connected with the harmonic pulse control matching circuit through a transistor T1; the harmonic pulse control matching circuit is connected with the J-type output matching circuit through a transistor T2; and a phase detection compensation circuit is also arranged between the output end of the input matching circuit and the output end of the J-type output matching circuit. According to the invention, the defect of low efficiency of a multi-stage radio frequency power amplifier is made up, and the defect of phase adaptation of a nonlinear harmonic power amplifier is made up through a phase compensation circuit; an output signal is converted into a direct-current component, the direct-current component is compared with a threshold value set by AMP, and the phase of an input signal is controlled by controlling a capacitor array; according to the invention, the voltage and current overlapping area is greatly reduced, and the system efficiency is improved.

Methods and apparatus related to pulse-shaped and overlapped phase tracking reference signals are disclosed. Signaling that indicates information associated with first pulse shaping is communicated between a first communication device and a second communication device in a wireless communication network. Data with a phase tracking reference signal (PT-RS) is generated based on the first pulse shaping, and is transmitted and / or received as pulse-shaped PT-RS and data comprising the PT-RS and data to which second pulse shaping, different from the first pulse shaping, has been applied.

The application relates to a satellite communication transmission method and device. The method of the application is applied to a sending end and comprises the following steps: encoding source data, and framing the coded output data based on an agreed subframe structure; performing symbol mapping processing on the framed output subframes to generate a first baseband signal; performing pulse shaping processing to obtain a second baseband signal; performing up-conversion and digital-to-analog conversion processing on the baseband signal to obtain an analog signal meeting the emission frequency point requirement and the sampling rate requirement, and performing emission; the subframe structure comprises a frame header synchronization sequence, a characteristic sequence used for carrying modulation mode information and coding mode information, a data load sequence and a frame tail synchronization sequence; the frame header synchronization sequence, the characteristic sequence, the data load sequence and the frame tail synchronization sequence are arranged in sequence, and the end of each sequence is sequentially inserted with a symbol pilot, and each symbol pilot constitutes a unique word sequence used for realizing a preset function. The application is beneficial to improving communication stability.

1. The name of the design product: digital multi-channel pulse amplitude analyzer. 2. The use of the design product: the main use of the design product is to provide high voltage for the detector, to provide working voltage for the preamplifier, high-precision signal processing and pulse shaping, high-speed data transmission, etc. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: front view.

A system includes an inverter including: a first galvanic isolator separating a low voltage area from a high voltage area, the first galvanic isolator having a first galvanic isolator output path; a second galvanic isolator having a second galvanic isolator output path; an amplifier connected to the first galvanic isolator via the first galvanic isolator output path, and connected to the second galvanic isolator via the second galvanic isolator output path, the amplifier having a first amplifier output path and a second amplifier output path; a comparator connected to the amplifier via the first amplifier output path and the second amplifier output path, the comparator having a first comparator output path and a second comparator output path; and a pulse reshape and envelope detector connected to the comparator via the first comparator output path and the second comparator output path.

The invention discloses an optical frequency comb generation device and method based on a 3 * 3 optical fiber coupler, and the device comprises a single-frequency microwave source, a phase shifter, a continuous wave laser, an intensity modulator, a phase modulator, a first connection optical fiber part, and a second connection optical fiber part. The microwave signal output end is connected with the intensity modulator or the phase modulator; the continuous wave laser comprises a laser signal output end, and the laser signal output end is connected with the intensity modulator; the intensity modulator and the phase modulator are connected with the input end of the non-linear optical annular mirror through the first connecting optical fiber part, the output end of the non-linear optical annular mirror is connected with the second connecting optical fiber part, and the non-linear optical annular mirror comprises a 3 * 3 optical fiber coupler and a non-linear optical fiber which are coupled; a 3 * 3 optical fiber coupler is adopted to form a nonlinear optical annular mirror, ultra-short pulse shaping is achieved through the interference effect between two paths of reverse transmission light fields, continuous wave background noise and pulse base side lobes are effectively eliminated, and through the design of an optical fiber coupling mode and a loop port connection mode and the selection of an input end and an output end, ultra-short pulse shaping is achieved. And the nonlinear chirp part of the pulse waveform is greatly inhibited, and the linear characteristic of the nonlinear chirp part is kept, so that the ultra-wideband optical frequency comb light source with remarkable spectral balance is realized in the high nonlinear parameter mixing process.