105 results about "Arbitrary waveform generator" patented technology

The invention provides an arbitrary waveform generator multi-chip DAC synchronization system, a delay adjustment module comprises an FPGA chip, an integrated clock management chip and a plurality of DAC chips, and the FPGA chip provides digital signals needing to be converted into analog waveforms for the DAC chips and sends parameter configuration signals to the integrated clock management chip and the DAC chips; the integrated clock management chip generates a reference clock, generates a sampling clock based on the reference clock, distributes the sampling clock to the DAC chip and the FPGA chip, and distributes a synchronization signal to the DAC chip; the multiple DAC chips are all configured to be slave chips to form multiple paths of arbitrary waveform generator output channels, digital signals are synchronously converted into analog signals, the analog signals are processed by a conditioning circuit and then output, the circuit structure of the system is remarkably simplified, synchronization of the multiple DAC chips can be achieved only through one integrated clock management chip, and the system is simple in structure, convenient to use and high in practicability. In addition, delay adjustment between DAC chips can be flexibly achieved, calibration or alignment of circuits and devices is not needed, and good application effects are achieved.

The utility model discloses a distributed sound wave sensing system for multi-frequency pulse modulation, and relates to the technical field of distributed sound wave sensing. The system comprises a narrow linewidth laser, an optical fiber coupler, a polarization-maintaining optical isolator, an acousto-optic modulator, a polarization-maintaining delay optical fiber, an erbium-doped optical fiber amplifier, a polarization-maintaining dense wavelength division multiplexer, an optical fiber circulator, an optical fiber Bragg grating, a piezoelectric transducer, a polarization controller, a photoelectric balance detector, a data acquisition card, an arbitrary waveform generator and the like. According to the utility model, the multi-frequency delay ring is utilized to carry out multi-frequency modulation, the frequency number of light waves is increased along with the circulation times of the light waves in the delay ring, and under the condition that the utilization of a large-bandwidth electro-optical modulator is not increased, the flexible modulation of the frequency is realized by utilizing a low-bandwidth acousto-optical modulator without being influenced by carrier frequency and sidebands of each order; the low-bandwidth acousto-optic modulator is used for frequency modulation in the multi-frequency delay ring, and compared with an electro-optical modulation or multi-acousto-optic / multi-light source modulation scheme, the modulation cost is effectively saved.

The invention relates to the technical field of integrated circuit testing, and discloses a method and equipment for scanning a voltage and current flip point of a chip, and the method comprises the following steps: an upper computer completes parameter configuration and wave table loading and then sends a starting instruction, a global synchronization unit generates a synchronization signal, and the synchronization signal is sent to a chip; the random waveform generator is started in parallel for scanning, the trigger unit is started for monitoring, the internal counter is started for timing, when the trigger unit monitors overturning, a stop signal is sent, the global synchronization unit latches a count value immediately, and finally, the upper computer reads the count value and calculates an overturning point value in combination with a wave table rate and a clock period. According to the invention, the global synchronization unit is used for coordinating the parallel hardware architecture of the arbitrary waveform generator and the trigger unit, so that the continuous scanning of the excitation signal and the real-time monitoring of the response signal can be autonomously operated on the hardware level, and the overall time consumption of a single flip point test is greatly shortened.

A system comprises a digitally programmable frequency chirp generator configured to generate a frequency chirp, an attenuator coupled to the digitally programmable frequency chirp generator and a directional device integrated into a cryogenic circuit configured to control superconducting qubits and coupled to the digitally programmable frequency chirp generator. The directional device comprises a main arbitrary waveform generator and an on-chip programmable self-interference canceller.

A technique for calibrating signal currents in a radio frequency signal generator system, such as an arbitrary waveform generator system, is provided. The device includes a current measurement circuit and a current imbalance correction circuit. The current measurement circuit is configured to measure a first current in a first signal path of a radio frequency signal generator and a second current in a second signal path of the radio frequency signal generator during a calibration process. The current imbalance correction circuit is configured to adjust a current level in at least one of the first signal path and the second signal path of the radio frequency signal generator to compensate for an imbalance between the measured first current and the measured second current.

The invention relates to the technical field of satellite communication, and discloses a multiband local oscillator signal generation system and method, and the system comprises a laser, an optical splitter, a first optical modulator, a second optical modulator, an arbitrary waveform generator, an optical coupler, and a signal generation module. The optical splitter divides an optical carrier generated by the laser into first carrier light and second carrier light; the arbitrary waveform generator converts the digital signal into a digital baseband signal to be modulated; the first optical modulator modulates the first baseband signal to the first carrier light to obtain a first optical frequency comb; a second optical modulator modulates a second baseband signal to second carrier light to obtain a second optical frequency comb; the optical coupler couples the first optical frequency comb and the second optical frequency comb into a laser signal; the signal generation module converts the laser signal into a local oscillator millimeter wave signal. Dual-coherent optical frequency combs with different comb tooth intervals are generated through modulation of digital signals with different bit rates, tuning of local oscillation signals is achieved, and the requirement for multi-frequency local oscillation is met.

The invention discloses a polarization adjusting device and a polarization adjusting method. The polarization adjusting device comprises a light source assembly, a micro-ring resonant cavity, a photoelectric detector, a digital oscilloscope, an arbitrary waveform generator and a power meter module. The light source assembly comprises a light source, a scanning module and a polarization controller connected with the transmission end of the light source. The micro-ring resonant cavity comprises a first output part and a coupling part coupled with the polarization controller. The photoelectric detector is connected with the first output part. The digital oscilloscope comprises a first input part and a second input part used for receiving an electric signal output by the photoelectric detector, and the digital oscilloscope can display the trough of the Lorentz curve. The arbitrary waveform generator includes a second output portion and a third output portion. The second output part is connected with the light source. The third output part is connected with the first input part. The power meter module is connected with the scanning module. According to the polarization adjusting device and the polarization adjusting method, the light source assembly can be quickly and efficiently adjusted to be in the TE polarization state or the TM polarization state.

The application provides a response measuring device for amplitude and phase of a nanoresonator. The response measuring device comprises: an arbitrary waveform generator for generating a first waveform signal and a second waveform signal; a nanoresonator for generating a vibration signal; a first radio frequency power divider for transmitting an equalized first vibration signal to a first signal path and a second vibration signal to a second signal path; a first processing module for multiplying the first vibration signal with the first waveform signal, filtering high frequency components in a first resultant signal, and obtaining an I(t) signal; a second processing module for multiplying the second vibration signal with the second waveform signal, filtering high frequency components in a second resultant signal, and obtaining a Q(t) signal; and a signal acquisition system for determining an amplitude signal and a phase signal of the nanoresonator according to the I(t) signal and the Q(t) signal. The application can replace a vector network analyzer to obtain the amplitude signal and the phase signal of the nanoresonator.

The invention provides a coherent optical time domain reflection sensing device and a method thereof, and relates to the technical field of distributed optical fiber acoustic wave detection. The device comprises a light source, a 1 * 2 coupler, a control and signal processing unit, an arbitrary waveform generator, a double-path parallel Mach-Zehnder electro-optical modulator, a reference arm optical fiber, an erbium-doped optical fiber amplifier, an optical filter, a circulator, a sensing optical fiber, a 90-degree optical mixer, a photoelectric detector and a data acquisition card. A detection light sequence containing positive and negative frequency shift light pulse sequences is injected into a sensing optical fiber, returned signal light which carries light phase information of each detection point and has superposed frequencies is mixed with local reference light, signal separation is achieved after the signal light is multiplied by complex factors corresponding to each frequency shift pulse and integration of a periodic integral multiple window is carried out, and the detection point light phase information is obtained. And optical phase information demodulation is carried out, and then fusion of detection results of optical signals of various frequencies is carried out, so that high-sampling-rate sensing of acoustic vibration is realized.

The application provides a frequency-modulated continuous wave laser radar system and relates to the technical field of laser radar.The frequency-modulated continuous wave laser radar system comprises a laser, an arbitrary waveform generator, an upper computer, a collection card, a lens, a first optical beam splitter, a linearity correction unit and a detection unit.The linearity correction unit comprises a second optical beam splitter, a delay line, a first coupler and a first balanced detector.The detection unit comprises a third optical beam splitter, a coaxial transceiving grating, a second coupler and a second balanced detector.The frequency-modulated continuous wave laser radar system improves the signal-to-noise ratio and the energy efficiency of the edge field of view, uses the coaxial transceiving grating to replace the circulator, eliminates the near-distance detection blind area of the radar system caused by the internal reflection of the circulator, integrates the linearity correction unit, performs real-time correction or monitoring on the frequency modulation of the laser, enhances the stability of the radar system, and does not need to build any additional optical circuit.

The invention provides a TEC controller chip test system and method, the system employs an integrated circuit automatic test machine ATE to test a TEC controller chip, the ATE comprises a voltage or current source, a high precision measurement unit, a power resistor and an arbitrary waveform generator, the voltage or current source is used as a power supply, the high precision measurement unit is used as a test instrument, and the power resistor is used as an arbitrary waveform generator. The power resistor is used for simulating the TEC, and the arbitrary waveform generator is used for simulating the voltage of the thermistor. According to the invention, the technical problems of high cost, low efficiency and low system reliability of the test of the TEC controller chip in the prior art can be solved.

The application provides a device and a method for realizing PON rate adjustment based on Polar modulation, and relates to the technical field of passive optical networks.The device comprises a first external cavity laser, a second external cavity laser, a dual-polarization phase quadrature modulator, an arbitrary waveform generator, an erbium-doped fiber amplifier, a single-mode optical fiber, a variable optical attenuator, a coherent receiver and an oscilloscope.The method comprises the following steps: dynamically adjusting the number of information bits A, splicing check bits to form total information bits, optimizing the distribution of information bits and frozen bits according to the optical signal channel sorting result, performing polar encoding on the signal at the encoding end, and mapping the signal into a 16QAM code symbol sequence by using the Polar modulation technology; at the receiving end, calculating the LLR, calculating the path metric value of all paths and performing a pruning operation when the list width reaches a set value, and detecting the L candidate paths by using the CRC check after the decoding is completed.The application realizes flexible regulation and control of the transmission rate of different optical network units.

The application discloses an optical frequency comb automatic recovery device and method, and belongs to the field of silicon-based nonlinear optical photoelectric modulation. The application comprises a laser, an IQ modulator, an acousto-optic modulator, a fiber amplifier, a polarization controller, a micro-ring resonator, a phase-locked loop, an arbitrary waveform generator, a photoelectric detector, a PID module and an upper computer. Transmission loss of an optical frequency comb debugging system is tested, which comprises fiber loss before laser enters a microcavity and transmission loss after the laser enters the microcavity; the output frequency range of the phase-locked loop is adjusted, and frequency scanning is performed on the microcavity; laser wavelength is entered from blue detuning, the output power of the laser is gradually reduced through the acousto-optic modulator, and the wavelength is kept unchanged; when the PID detects a power rise, the laser power is quickly raised until the PID detects a rising step; the laser frequency is slowly increased and the power is kept unchanged until a single soliton optical frequency comb is observed; when the single soliton disappears, the control steps after the laser wavelength is entered from blue detuning are repeated, and the optical frequency comb is automatically recovered.

The present invention discloses a secure communication method and system based on chaotic prediction and interleaving coding in a reserve pool. The chaotic encryption module includes a light source output by a first continuous wave laser (CW), which is modulated by a parallel quadrature modulator (IQM) to convert the signal output by an arbitrary waveform generator (AWG) for transmission. The signal is pseudo-randomly interleaved and encoded. The transmitted signal is loaded onto a chaotic carrier through a first optical coupler (FC) to achieve chaotic hiding. The chaotic optical carrier is then transmitted through an information transmission module. The chaotic optical carrier is predicted in advance by the reserve pool in the chaotic decryption module and modulated onto the continuous optical carrier output by a second continuous wave laser (CW) through a Mach-Zehnder modulator (MZM). The signal is then decrypted by a 90° mixer to initially restore the original transmitted signal. Finally, the resulting signal is processed by a local oscillator (LO) and a coherent receiver, and digital information processing (DSP) is performed to compensate, recover, and decrypt the digital signal, thereby realizing chaotic secure coherent optical communication.

This application provides an output amplifier circuit and an arbitrary waveform generator, belonging to the field of electronic circuit technology. The output amplifier circuit includes: a radio frequency amplifier circuit, including a first common-emitter amplifier sub-circuit and a second common-emitter amplifier sub-circuit, for amplifying high-frequency signals in the AC input signal from the input node; the second common-emitter amplifier sub-circuit includes a second transistor, the collector of which is connected to the output node through a current-sampling resistor; an output bias voltage circuit for superimposing an output bias voltage onto the output node; a static bias voltage circuit for providing a static bias voltage to the second transistor and outputting a reference voltage to the integrator circuit; a feedback amplifier circuit for outputting a feedback signal based on the static operating current of the second transistor; and an integrator circuit for outputting an integrated signal based on the reference voltage and the feedback signal. This output amplifier circuit can solve the problems of small output bias voltage range and performance degradation in ultra-high bandwidth AWGs.

The invention belongs to the technical field of optics, and particularly relates to an unequal-interval frequency comb generation and detection device and method based on a single side band modulator. In order to improve phase coherence between comb teeth, an arbitrary waveform generator generates a modulation signal, the modulation signal is amplified by a power amplifier and then input into a single-side-band phase modulator, a laser is connected with an optical signal input end of the single-side-band phase modulator, and an output end of the single-side-band phase modulator is connected with an optical beam splitter. The light beam splitter divides light into two paths, one path serves as reference light to enter the first detector, the first detector converts the reference light into an electric signal and then carries out FFT observation, the other path serves as detection light, is absorbed by the gas chamber and then is input into the second detector, and the second detector converts the detection light into an electric signal and then carries out FFT observation.

This invention relates to a machine learning-based modeling method for cloud wireless access networks, comprising: acquiring a remote cloud wireless access network transmitter; improving the remote cloud wireless access network transmitter by replacing the traditional microwave source with a dual-ring opto-oscillator to suppress side modes through single-mode oscillation; and introducing a directly modulated laser after an arbitrary waveform generator to utilize the chirp effect and fiber dispersion to generate power gain; and modeling the millimeter-wave signal spectrum of the improved remote cloud wireless access network transmitter based on a lightweight gradient booster model to match the dimensions of input and output features. This invention uses a dual-ring opto-oscillator to replace the traditional microwave source, reducing phase noise; utilizes the synergistic gain behavior of the directly modulated laser chirp and fiber dispersion to improve the transmission gain of the millimeter-wave signal; and models the spectral characteristics of the millimeter-wave signal using a lightweight gradient booster model to achieve spectrum prediction.

The invention discloses a magnetic ring saturation characteristic measurement method and device, and the method comprises the steps: building a measurement circuit which comprises an arbitrary waveform generator, a power amplifier, a measured magnetic ring and a matched load based on the reference data of an impedance analyzer, and setting a voltage sensor, a current sensor and a thermocouple to obtain the voltage, current and temperature data of the measured magnetic ring; impedance and inductance data are obtained through calculation and serve as actual measurement data; comparing the measured data with the reference data, defining the ratio of the inductance data attenuation of the measured magnetic ring to the inductance data measured by the impedance analyzer as the saturation rate of the magnetic ring, and recording the signal type, frequency, amplitude and temperature rise corresponding to the magnetic ring at the moment; by fixing the signal type and the frequency and adjusting the signal amplitude, the saturation characteristic of the measured magnetic ring along with the amplitude change under the signal type and the current frequency is obtained; whether the magnetic ring is saturated or not and the saturation degree can be judged, and whether the magnetic ring is available or not is judged by measuring the temperature rise after the magnetic ring is saturated.

This invention discloses a radio frequency arbitrary waveform generator, generation method, related systems, and devices. The generator includes: a frequency processing unit that processes a frequency parameter sequence to obtain cumulative phase data; a phase processing unit that processes a phase parameter sequence to obtain effective phase data; an amplitude processing unit that processes an amplitude parameter sequence to obtain effective amplitude data; a local oscillator processing unit that processes a local oscillator parameter sequence to obtain a local oscillator signal; an arithmetic unit that performs calculations on the cumulative phase data and effective phase data to obtain input angle data, and obtains sine and cosine data through calculation or table lookup; an I-unit and a Q-unit that generate I-channel signals and Q-channel signals respectively based on the amplitude data and sine and cosine data; and a mixing unit that performs IQ mixing on the I-channel signals, Q-channel signals, and local oscillator signal to generate an IQ mixed transmit signal. It can generate radio frequency signals with arbitrarily controllable and adjustable spectrum, phase, and amplitude, with high control precision.

The invention provides a photoelectric oscillator capable of being used for generating tunable phase coding microwave pulses. The photoelectric oscillator is composed of a tunable laser, a polarization controller, a phase modulator, a dual-drive Mach-Zehnder modulator, an optical circulator, a phase shift fiber bragg grating, a single-mode fiber, a photoelectric detector, an electric amplifier, a microwave source and an arbitrary waveform generator. The invention develops the active mode-locked photoelectric oscillator for generating the phase-coded microwave pulse signal, which is simple in structure and good in tunability. On the basis of an active mode-locked optoelectronic oscillator, a phase modulator is driven by a phase coding signal, so that the duration of each voltage polar code is kept consistent with the loop delay of the optoelectronic oscillator, and a phase-coded coherent microwave pulse sequence is generated. The signal has the advantage of large time bandwidth product, can give consideration to the detection distance and distance resolution of the radar, and has the characteristics of interference resistance, low interception and the like.

A signal generation device and method, an analog-digital hybrid test board, and a test machine. The signal generation device comprises: an arbitrary waveform generator, a read / write control module, an external clock chip, and a storage device; the external clock chip is configured to output a fixed-frequency sampling clock to a digital-to-analog conversion device; the read / write control module is connected to the arbitrary waveform generator and the storage device, and is configured to read an original waveform from the storage device on the basis of a received read request instruction, and return the read original waveform to the arbitrary waveform generator; and the arbitrary waveform generator is configured to perform resampling processing on the received original waveform to generate a reconstructed waveform matching the frequency of the sampling clock, wherein the reconstructed waveform is used by the digital-to-analog conversion device to perform digital-to-analog conversion on the basis of the sampling clock outputted by the external clock chip.

The invention discloses a multi-discharge source simulation method and device based on broadband radio frequency. The method comprises the following steps: collecting a time sequence atlas containing a typical partial discharge source and an interference source in partial discharge and interference tests; performing signal reconstruction on the time sequence map, converting the time sequence map into an editable digital signal, and generating a digital time sequence map of each type of partial discharge source / interference source; an arbitrary waveform generator is adopted to generate multiple paths of independent and controllable broadband radio frequency pulse signals according to the digital time sequence atlas; performing broadband power amplification on each path of broadband radio frequency pulse signal to generate a plurality of paths of amplified broadband radio frequency pulse signals; and deploying multiple paths of amplified broadband radio frequency pulse signals at different positions to simulate discharge sources at different positions. The anti-interference capability and the detection positioning precision of the radio frequency partial discharge detection device can be effectively tested and verified, the reliability and the detection accuracy of the detection device are improved, and a powerful guarantee is provided for safe and stable operation of a novel power system.

The invention provides a broadband atom terahertz detection method and device, and relates to the technical field of terahertz detection and imaging, and the method comprises the steps: generating a time coding sequence through an arbitrary waveform generator, and controlling a microwave switch to carry out the orthogonal coding modulation of a terahertz field, so as to generate a terahertz differential signal carrying coding information; acting the terahertz differential signal on Rydberg atoms in an atomic gas chamber so as to convert terahertz information into transmission light intensity change of probe light, and converting the optical signal into an electric signal; and performing synchronous demodulation and acquisition on the electric signal to generate a measurement vector, and reconstructing an original terahertz time domain waveform from the measurement vector through a compressed sensing reconstruction algorithm. Through combination of superheterodyne detection and a time domain calculation imaging algorithm, the physical limitation of the bandwidth of the atom detector is broken through, and rapid and high-resolution detection of broadband terahertz signals is realized while the advantage of high sensitivity of the atom detector is maintained.

1. Name of the product in this design: Graphical user interface for configuring signals of a multi-channel function or arbitrary waveform generator for electronic devices. 2. Purpose of this design: An electronic device. 3. The key design feature of this product is its graphical user interface. 4. The image or photograph that best illustrates the design's key features: the front view. 5. As is customary, rear view, left view, right view, top view, and bottom view are omitted. 6. Purpose of the graphical user interface: to configure the signals of each channel of the signal source and to simulate the actual waveform signal output. 7. Human-computer interaction method of graphical user interface: The main view is the main interface of the product; clicking the "CH2" button in the lower left corner of the main view will display the interface change status diagram. In the interface view, "X" represents text, numbers, or symbols that can be changed or replaced.

The invention provides an AC voltage phase jitter error compensation system and method based on differential sampling, and the system is characterized in that a to-be-detected AC source is connected with one side of a self-made double-pole double-throw switch; the common end of the double-pole-double-throw switch is connected with the low end of the digital-to-analog conversion board card serving as the voltage standard and the low end of the transformed sampling voltmeter. Two groups of reference signals sent by the rubidium clock are respectively connected to external reference clocks of the two groups of arbitrary waveform generators and external reference signals of the digital-to-analog conversion board card through the self-made optical isolator; the group of arbitrary waveform generators are respectively connected with an external phase-locked end of the AC signal calibration source to be tested, the transformed sampling voltmeter and a trigger signal end of the standard digital-to-analog conversion board card through three optical isolators; and the other group of arbitrary waveform generator is connected with an external reference signal end of the sampling voltmeter through a self-made optical isolator. According to the invention, measurement errors caused by phase jitter can be effectively compensated, so that the accuracy of high-frequency AC voltage magnitude transmission is improved.

This application discloses an optical domain decoupling amplitude-frequency response equalization optimization method and apparatus. First, a system-level calibration is performed on the optoelectronic link, which includes an arbitrary waveform generator, intensity modulator, photodetector, and oscilloscope, to obtain the overall frequency response of the link, including amplitude and phase frequency responses. Then, the transmitter amplitude-frequency response is obtained through optical domain scanning and normalization. The receiver amplitude-frequency response is separated from the overall amplitude-frequency response through decoupling operations. Finally, a transmit-receive domain equalization strategy is used to complete transmit signal pre-distortion compensation and receive signal de-embedding compensation, respectively. This successfully achieves a balance between testing cost, testing time, and equalization performance, realizing low-cost, high-efficiency, and high-performance frequency response decoupling and equalization compensation for IMDD high-speed optical links. It provides an efficient, economical, and high-performance solution for the research and testing of IMDD high-speed optical modules.

A method for reverse virtual screening based on programmable quantum computing, characterized in that the method comprises the following steps: S1. Calculating a binding interaction graph of the given small molecule and the target protein molecule on the computer based on different pharmacophore distances for a given small molecule and a target protein molecule; S2. Encoding an adjacency matrix of the binding interaction graph into a platform for quantum-reverse virtual screening by decomposing the adjacency matrix; S3. Performing a Gaussian Bose scan over the platform for quantum-reverse virtual screening, which includes the following substeps: S31. Generating a set of single-mode vacuum compression states with different compression levels using the acousto-optic modulator to chop the pulsed laser to pump the nonlinear crystal, and sending the set of single-mode vacuum compression states into the cyclic optical path of the quantum processing unit module; S32. Performing a high-dimensional global primary state evolution operation by an electro-optic modulator in the cyclic optical path, and inputting the evolution result into the detection module, where the number of electro-optic modulators is two and the electro-optical modulator is equipped with a power amplifier for amplifying an analog signal and is controlled by a programmable arbitrary waveform generator; S33. Measuring the presence or absence of the number of photons in each mode by a single-photon superconducting detector in the detection module, and inputting the measurement result into the computer to obtain the sample result processed by the quantum algorithm; and S4. Generating all full-linkage subgraphs of the binding interaction graph according to the sampling results, and generating a full-linkage subgraph with the greatest weight by sorting all full-linkage subgraphs according to weight, thereby directly determining the optimal binding mode between the small molecule and the target protein molecule by the structure of the full-linkage subgraph with the greatest weight.

The present application relates to the technical field of ultrasonic detection and signal measurement, and aims at solving the common problems in the prior art, such as uncontrollable environment, insufficient precision in shallow water and low speed, etc. The present application provides a method and system for verifying the precision of underwater acoustic Doppler velocity measurement. The method comprises the following steps: a host computer controls a three-axis motion module to drive an ultrasonic transducer to make controllable motion in still water, and the relative speed between the transducer and the stationary reflecting interface is taken as a traceable reference speed; waveform parameters are defined according to a flow measurement mode, a transmission signal is generated by an arbitrary waveform generator, and the transducer is driven by a power amplifier to emit sound waves; an oscilloscope acquires echo signals and completes analog-to-digital conversion under the control of a synchronous trigger signal; the host computer reads echo waveform data, and executes algorithm processing such as quadrature mixing, low-pass filtering and complex autocorrelation, etc., to obtain a measured speed; and the measured speed is compared with the reference speed to realize quantitative verification of the velocity measurement precision, and the method has the characteristics of high precision and strong stability.

The invention relates to a vibration compensation effect simulation evaluation system and method based on VCO (Voltage Controlled Oscillator) phase accumulation, and the system comprises an arbitrary waveform generator, a simulation differentiator, a voltage-controlled oscillator, a real-time compensation module, an oscilloscope and an upper computer, the analog differentiator is connected with the voltage-controlled pins of the voltage-controlled oscillator and the analog differentiator, the analog differentiator inputs processed signals to the real-time compensation module, integral following signals output by the real-time compensation module and modulation signals output by the voltage-controlled oscillator enter the oscilloscope to be collected and recorded, and the oscilloscope is connected with the upper computer through a USB (universal serial bus). And the data stream is transmitted to an upper computer for automatic calculation processing. According to the invention, a pure electronic signal simulation scheme is adopted, a vibration signal is generated through a signal generator, and a to-be-tested compensation module and a phase accumulation reference circuit based on a VCO are input at the same time, so that a double-path parallel processing verification architecture is constructed. The system remarkably improves the development and test efficiency of the compensation system.

The present application relates to a kind of multi-band reconfigurable fourier mode-locked optoelectronic oscillator, its structure includes laser, electro-optic modulator, photodetector, first A low noise amplifier, first multiplexer, second multiplexer, filter amplification branch, arbitrary waveform generator and electric power divider etc., wherein, first multiplexer, second multiplexer, the N filter amplification branches connected therebetween and arbitrary waveform generator jointly constitute multi-band reconfigurable filter module.The present application sets up multiple filter amplification branches in optoelectronic feedback oscillation loop, thereby constructs a multi-band fourier mode-locked oscillation loop cavity, the frequency range and period of multi-band reconfigurable microwave signal are determined by the sweep width and period of tunable filter in each filter amplification branch in multi-band reconfigurable filter module.Thereby for anti-radar or anti-jamming communication system provides a high-quality microwave signal source.