155 results about "Signal synthesis" patented technology

A low voltage ride through control method for a grid-forming inverter based on dynamic internal potential adjustment comprises the following steps: detecting a voltage per unit value of a grid-connected point in real time, and comparing the voltage per unit value with a threshold value to judge a voltage drop event and trigger low voltage ride through control; dynamically calculating active and reactive power reference values through a reactive compensation equation and an active current limiting equation according to the voltage amplitude and the power reference value before falling during the ride-through period; inputting the active reference value into a virtual rotor motion equation to generate a reference phase, and outputting a phase reference signal in combination with a dual-mode phase compensation controller; superposing the reactive reference value with the reference voltage through a reactive voltage regulating ring to generate a voltage amplitude reference signal; synthesizing an internal potential according to the phase and the amplitude reference signal, and obtaining an inductive current reference value through virtual impedance control and current amplitude limiting; and finally, a driving signal is generated through the current inner loop controller and the modulation module. According to the invention, overcurrent can be effectively inhibited, rapid reactive power support is provided, and synchronous stability and smooth transition in a fault period and a recovery process are ensured.

The invention discloses a dynamic electromagnetic shielding method for a complex electromagnetic environment and a shielding device thereof, and the method comprises the steps: obtaining real-time voltage data in the complex electromagnetic environment, carrying out the voltage feature analysis, outputting a feature vector of a real-time voltage signal, and analyzing the type of an interference source of a current electric field according to the feature vector, performing interference trend time sequence prediction processing on the feature vector through a pre-trained LSTM model according to the interference source type to obtain a time domain voltage value and a phase deviation value, and performing composite loss coefficient calculation on the time domain voltage value and the phase deviation value to obtain a composite loss coefficient; and performing reverse offset signal synthesis processing on the voltage interference signal according to the calculated composite loss coefficient, performing coil dynamic activation processing on a preset multi-coil array according to the synthesized reverse offset signal, generating a directional offset magnetic field corresponding to the real-time electromagnetic interference, and performing electromagnetic offset shielding on the current electromagnetic interference. According to the invention, transient interference can be responded in time, and the electromagnetic shielding effectiveness can be improved.

The invention discloses a vehicle-mounted CAN bus anti-interference communication system and method based on photocoupling, and the system comprises an anti-interference communication system frame, the anti-interference communication system frame comprises a CAN bus receiving and transmitting module, a photocoupling isolation module, and a signal processing and separating module, the CAN bus receiving and transmitting module is used for receiving and transmitting CAN bus signals, and the photocoupling isolation module is used for receiving and transmitting the CAN bus signals. The photoelectric coupling isolation module is used for realizing transparent conversion of data between an optical signal and an electric signal and realizing electrical isolation of a physical layer while maintaining the integrity of a CAN protocol, and the signal processing and separation module is used for constructing a cooperative processing mechanism of time sequence calibration, differential judgment, logic reconstruction and signal synthesis. According to the invention, based on a physical layer signal isolation mechanism of optoelectronic isolation, a bidirectional independent transmission path of a CAN bus TXD / RXD channel data stream is established, and TXD mapping data and CAN bus effective data in an RXD channel are accurately separated, so that the system reliability in an industrial-grade communication scene can be obviously improved.

The invention relates to a square wave generation method and system based on a DDS signal transmitter, and belongs to the technical field of digital electronic signal synthesis. The method comprises the following steps: calculating a digital analog signal sampling frequency based on a square wave output frequency set by a user, and obtaining a digital fundamental frequency phase signal according to a phase-locked loop precision range; mapping the digital fundamental frequency phase signal into a sinusoidal amplitude signal according to a digital phase accumulation mechanism to obtain a digital-analog conversion clock, binarizing the sinusoidal amplitude signal, and outputting a square wave output period; dividing a square wave output period into a low level region and a high level region according to the precision range of the phase-locked loop, reading a square wave output frequency set by a user through a random storage address, and outputting a non-offset phase-locked square wave; and constructing an error accumulation self-checking architecture to calculate a frequency control word, and when detecting that the frequency control word has a decimal discarding error, recalculating the frequency control word.

The invention provides a permanent magnet synchronous motor rotating speed control method and system, and belongs to the technical field of motor control. The method comprises the following steps: firstly, constructing a discrete time mathematical model of a motor and an external source system comprising a lumped reference signal and lumped interference, and establishing a composite system model according to the discrete time mathematical model; then, constructing a dimensionality reduction observer to estimate an external source signal, and performing state and input transformation in combination with a regulator equation; thirdly, constructing a constraint set of the transformation system, and decomposing a state variable into a nominal component, a deterministic error component and an uncertain error component; a time-varying constraint tightening set is dynamically constructed according to the error, a model prediction control optimization problem with dynamic tightening constraint is solved online, and a nominal control quantity is obtained; and finally, combining the nominal control quantity and the estimated external source signal to synthesize an actual control voltage. According to the method, interference can be effectively suppressed, system security constraints are strictly ensured, recursion feasibility and closed-loop stability of control are ensured, and the dynamic response speed is increased.

The embodiment of the invention provides a frequency multiplication amplification circuit applied to a phase-locked loop and communication equipment, and the frequency multiplication amplification circuit applied to the phase-locked loop comprises a local oscillator frequency division module which is electrically connected with the output end of the phase-locked loop and is used for receiving a radio frequency signal output by the phase-locked loop and outputting a local oscillator signal according to the radio frequency signal; the frequency mixing module is electrically connected with the output end of the phase-locked loop and the output end of the local oscillator frequency division module, and is used for synthesizing a frequency mixing signal according to the radio frequency signal and the local oscillator signal; wherein the frequency of the frequency mixing signal is greater than that of the radio frequency signal. According to the technical scheme, the frequency multiplication amplification circuit is arranged outside the phase-locked loop, the frequency of the output signal of the phase-locked loop can be amplified, the output frequency of the phase-locked loop can be expanded without changing a core circuit in the phase-locked loop, and the frequency multiplication amplification circuit applied to the phase-locked loop is simple in structure.

Synthetic signal creation and management systems and methods for a vehicle include a cloud-based network configured to generate a software policy for a synthetic signal engine and an electronic control unit (ECU) of the vehicle that is configured to receive the software policy from the cloud-based network, configure the synthetic signal engine based on the software policy, execute the synthetic signal engine to create, based on datapoints for two or more foundational vehicle signals, a synthetic vehicle signal, and output the synthetic vehicle signal. The synthetic vehicle signal could comprises concurrent datapoints for the two or more foundational vehicle signals or datapoints for the two or more foundational vehicle signals, respectively, over a specified duration of time. The synthetic signal engine could also be configured to create the synthetic vehicle signal based further on at least one other previously-created synthetic vehicle signal.

The application discloses a six-tone signal generation circuit system, and relates to the technical field of circuit design, comprising: a quadrature frequency mixing module, a local oscillator driving module, a frequency mixing module, a signal synthesis module and a power amplification module; the quadrature frequency mixing module is used for frequency conversion of input first and second differential quadrature signals to first and sixth output signal frequencies; the signal output by the quadrature frequency mixing module, containing the first and sixth output signal frequencies, is used as the input of the signal synthesis module and the local oscillator signal of the frequency mixing module; the local oscillator driving module is used for amplifying the signal containing the first and sixth output signal frequencies as the local oscillator of the frequency mixing module; the frequency mixing module is used for frequency conversion of input differential signals to second, third, fourth and fifth output signal frequencies; the signal synthesis module is used for synthesizing the above six-tone signals; and the power amplification module is used for wideband amplification of the output six-tone signals and improvement of output power. The circuit system effectively solves the technical problem of multi-tone signal generation in a quantum conditioning circuit.

The utility model discloses galvanized steel plate heat treatment equipment, belongs to the technical field of steel plate heat treatment, and solves the problems that when the existing steel plate heat treatment equipment is used for carrying out induction heating on a steel plate, the heating quantity is the same when the steel plate with any thickness and width is heated due to the fact that the current is generally kept unchanged. For thin steel plates, the problem of excessive heating may be caused. Comprising a machine shell and a conveying mechanism arranged in the machine shell. When the device is used, a steel plate enters the shell through the conveying mechanism and is subjected to heat treatment through the induction heating coil. The coil control circuit detects the thickness and the width of the steel plate. The width detection module outputs a voltage signal in direct proportion to the width through magnetic field changes. The thickness detection module converts the voltage signal into a voltage signal in inverse proportion to the thickness through a current phase difference. The signals are synthesized to generate comprehensive control voltage, the current amplitude of the induction coil is adjusted, closed-loop control is formed, and excessive heating of the steel plate is avoided.

This invention provides a feedback tracking control method based on scalarized visual frame pixels. First, a dynamic state-space model of a vehicle following system is established and the system state variables are determined. Then, a state feedback tracking controller is designed for the dynamic state-space model. The original image of the leading vehicle is acquired and input into an image signal synthesizer. After processing by the image signal synthesizer, a background image and a standard image are obtained. Next, a binarized digital image pixel mask method is used to scalarize the high-dimensional features of the original image, background image, and standard image of the leading vehicle to obtain the number of pixels of the leading vehicle and the image error, which has an implicit functional relationship with the system state variables. Finally, based on the functional relationship between the image error and the system state variables, the image error is directly fed back to the state feedback tracking controller to control the throttle of the following vehicle, achieving fixed-distance following control.

The invention discloses a millimeter wave radar array-based wind field fan blade integrated monitoring method, which comprises the following steps of: generating a point cloud observation result by performing range direction and Doppler processing on observation data acquired by a millimeter wave radar array at the top of a cabin, and constructing an echo energy time sequence in a fan blade area; and determining the sweep-over period of the fan blade through peak detection. A time slot control sequence is constructed, a fan blade occupation time period is used for point cloud reconstruction, and a non-shielding time period is used for wind measurement. In a fan blade point cloud reconstruction time slot, reconstructing a fan blade point cloud through methods of multi-channel signal synthesis, threshold detection, angle estimation and the like, and extracting blade state parameters; in a wind measurement time slot, a wind speed vector inversion model is established through multi-sight radial speed observation, and the wind speed and the wind direction are obtained by adopting a weighted fusion method. And fusing and outputting the fan blade state parameters and the wind field parameters in a unified coordinate system and a time axis. According to the method, additional wind measurement equipment is not needed, and integrated, continuous and high-reliability monitoring of the wind field and the fan blades is achieved.

The application discloses a thyristor trigger signal and driving circuit for non-controlled rectification of a direct-current bus voltage, comprising a voltage comparison unit, a pulse wave generation unit, a trigger signal unit and a driving unit; the voltage comparison unit is used for judging a thyristor opening time and sending an output effective level signal to the trigger signal unit; the pulse wave generation unit is used for generating a frequency-adjustable pulse wave and sending the pulse wave to the trigger signal unit; the trigger signal unit is used for synthesizing a trigger signal based on the effective level signal and the trigger signal and sending the trigger signal to the driving unit; and the driving unit is used for controlling conduction of the thyristor based on the trigger signal. The application greatly improves reliability of the thyristor driving, avoids problems of power waste and large loss of a driving power supply, and can be applied to high-power frequency converter products in batches.

The embodiment of the application provides an audio low-frequency signal gain control circuit and a related device, which comprise an input processing sub-circuit, a non-dynamic low-frequency signal processing sub-circuit, a dynamic low-frequency signal processing sub-circuit, a signal synthesis sub-circuit, an adaptive gain control sub-circuit and a bass speaker. The input processing sub-circuit is used for pre-processing an input stereo audio signal to obtain a first audio low-frequency signal; the non-dynamic low-frequency signal processing sub-circuit is used for processing the first audio low-frequency signal to obtain a non-dynamic audio low-frequency signal; the dynamic low-frequency signal processing sub-circuit is used for separating a dynamic audio low-frequency signal; the signal synthesis sub-circuit is used for merging the non-dynamic audio low-frequency signal and the dynamic audio low-frequency signal to obtain an audio low-frequency signal; the adaptive gain control sub-circuit is used for gain control on the audio low-frequency signal; and the bass speaker is used for outputting the audio low-frequency signal. In this way, the adaptive gain on the audio low-frequency signal is realized through an analog circuit.

A signal processing system may include a sensor readout channel configured to convert an electronic signal into a digital quantity. The sensor readout channel may include a sigma-delta modulator having a modulator input and a modulator output, first system-level chopping switches located at the modulator input, an auxiliary path comprising an analog-to-digital converter (ADC) having an auxiliary path input and an auxiliary path output, the auxiliary path input configured to receive as its input signal a signal output by a memory element of the sigma-delta modulator, second system-level chopping switches located downstream of the sigma-delta modulator and the auxiliary path, and a signal combiner configured to combine a modulator output signal generated by the sigma-delta modulator with an auxiliary path output signal generated by the auxiliary path to generate a combined output signal.

The application discloses a feedback cut-off and false alarm detection system, which comprises a signal trigger circuit, a false trigger detection circuit, a timing circuit and a signal synthesis circuit. When there is no specific trigger signal in space, the system is in a dormant state, and standby power consumption is almost zero. When there is a trigger signal in space, and the sum of the trigger signal and a pre-bias voltage is greater than a total switch-on voltage, the circuit is turned on to start working. The false trigger detection circuit can judge the false triggering of a non-specific signal and cut off the circuit when false triggering occurs. The timing circuit can realize the timing cut-off function of the circuit, and cut off the circuit when the working time of the circuit reaches a preset time, and the circuit continues to be dormant. The application has the characteristics of low power consumption, high sensitivity, low false alarm rate and stable closed-loop working of the circuit.

The utility model discloses a wireless temperature measuring device which comprises a thermometer and an enhancement amplifier, and the thermometer is used for being inserted into food for temperature measurement. The enhancement amplifier comprises a shell, a WIFI antenna and a Bluetooth antenna, a signal processor is arranged in the shell, the WIFI antenna and the Bluetooth antenna are arranged on the shell at intervals to receive multiple paths of signals, and the signal processor is used for receiving the signals of the thermometer and synthesizing the signals. The WIFI antenna and the Bluetooth antenna in the enhancement amplifier are arranged at intervals, so that the effect of improving the stability and reliability of wireless communication is achieved. In a complex cooking environment, wireless signals are easily interfered, multiple paths of the signals can be effectively received, the risk of signal attenuation is reduced, and stable transmission of temperature data is ensured. The signal processor synthesizes the signals from the different antennas, so that the accuracy of data transmission is improved, a user can accurately obtain food temperature information in real time in the cooking process, and the cooking experience is improved.

The application discloses a kind of wind field wind blade integrated monitoring method based on millimeter wave radar array, comprising: by the observation data obtained by millimeter wave radar array on the top of cabin is carried out distance and doppler processing, generate point cloud observation result, and construct echo energy time sequence in wind blade area, determine wind blade sweep period by peak value detection.Construct time slot control sequence, wind blade occupation period is used for point cloud reconstruction, unobstructed period is used for wind measurement.In wind blade point cloud reconstruction time slot, reconstruct wind blade point cloud by multi-channel signal synthesis, threshold detection and angle estimation etc., and extract blade state parameter;In wind measurement time slot, by multi-view radial velocity observation, establish wind speed vector inversion model, and obtain wind speed and wind direction by using weighted fusion method.Wind blade state parameter and wind field parameter are fused and output under unified coordinate system and time axis.The method does not need additional wind measurement equipment, realizes the integration, continuity and high reliable monitoring of wind field and wind blade.

The application relates to a low-power-consumption clock delay method and system in the technical field of integrated circuits, which comprises the following steps: based on a counting clock signal, the counting clock signal is phase-aligned with a clock signal to be delayed to generate a first phase clock alignment signal and a second phase clock alignment signal; the rising edge information and the falling edge information of the first phase clock alignment signal are extracted to obtain a pulse signal; the clock rising edge information and the clock falling edge information are split to obtain a first pulse filtering signal and a second pulse filtering signal; the first pulse filtering signal and the second pulse filtering signal are sequentially subjected to coarse delay, and after the coarse delay, signal synthesis processing is carried out to obtain a coarse delay clock signal; and based on a digital time converter, the coarse delay clock signal is subjected to fine delay to obtain a fine delay clock signal, thereby solving the problem that the existing delay technology cannot simultaneously realize high delay precision and a large dynamic range under low power consumption.

The invention discloses an ultrasonic prostate imaging method based on sparse angle amplification, and the method comprises the steps: collecting sparse angle RF ultrasonic signal data, carrying out the preprocessing, obtaining a preliminary signal aggregation result, and enabling a third signal aggregation layer of a signal preprocessing network to comprise a row aggregation transformation layer and a column aggregation transformation layer; the initial signal aggregation result is input into an imaging sub-network, an imaging result is obtained, and the imaging sub-network is a deep neural network model of a coding and decoding structure and is provided with a multi-scale signal synthesis module, an imaging sub-network encoder, a middle layer, an imaging sub-network decoder and an output layer. The multi-scale signal synthesis module is used for aggregating a plurality of signals in different scale ranges in the aspect of image arbitrary point numerical value acquisition by utilizing multi-scale cavity convolution and corresponding arbitrary point maximum value operation based on the preliminary signal aggregation result, and taking the maximum value as a final numerical value; and the imaging sub-network encoder, the middle layer, the imaging sub-network decoder and the output layer output an imaging result based on the final numerical value.

The application relates to the technical field of gate driving, and discloses an enhanced GaN power device crosstalk suppression driving circuit and method.The circuit comprises a pulse generation module, a driving signal generation module and a negative voltage clamping module.The pulse generation module generates three-way PWM signals;the negative voltage clamping module utilizes a monostable trigger circuit to process an upper tube control signal to generate a clamping trigger signal, and constructs a negative voltage generation circuit through a driving chip, a capacitor and a MOS tube; and the driving signal generation module combines the above signals into a multi-level driving signal to act on a lower tube gate.The application effectively suppresses false conduction by utilizing negative voltage when positive crosstalk occurs, rapidly clamps the gate voltage to 0V after the crosstalk is over, so as to adapt to different dead time applications and avoid threshold voltage drift caused by long-term negative voltage; and the gate-source voltage is clamped to a low positive level in the dead time, so as to significantly reduce the reverse conduction loss of the GaN device.Only a small number of devices are used to realize high reliability, low loss and crosstalk suppression.

The invention discloses a multifunctional transformer transformation ratio testing device capable of displaying a blind test graphical result. The multifunctional transformer transformation ratio testing device comprises a main control unit, a power management module, a man-machine interaction module, a data storage and communication module, a high-precision synchronous acquisition module and a three-phase digital signal synthesis and driving module, the main control unit comprises a microprocessor MCU (Microprogrammed Control Unit); the microprocessor MCU is connected with the three-phase digital signal synthesizing and driving module, and is used for controlling the signal source to sequentially output tentative test signals with various test frequencies and amplitudes to a transformer winding to be tested through the three-phase digital signal synthesizing and driving module; the microprocessor MCU is integrated with an intelligent blind test identification module, a high-precision three-phase digital signal synthesis module and a tap switch automatic calculation and error analysis module. According to the invention, real full-automatic blind testing is realized, the efficiency and the applicability are improved, the dependence on manual presetting of transformer parameters is thoroughly eliminated, and the testing efficiency is remarkably improved.

The application provides an antenna feed control method and circuit, and belongs to the technical field of wireless communication. The method comprises the following steps: receiving a signal strength ratio and a first phase difference between received signals of two feed points of an antenna, wherein the two feed points respectively receive one vertical component of an external signal; determining a power distribution ratio and a second phase difference between transmitted signals of the two feed points according to the signal strength ratio and the first phase difference, wherein the power distribution ratio is the same as the signal strength ratio, and the first phase difference is opposite to the second phase difference; and controlling the transmission power of the two feed points according to the power distribution ratio and the transmission phase of the two feed points according to the second phase difference by using a feed network. The application decomposes the external signal into two vertical components, and dynamically controls the transmission signals of the two antenna units by using the feed network according to the analysis results of the two vertical components, so as to synthesize a signal matched with the external signal, and always keep the antenna polarization loss between the two devices at a minimum.

The application relates to a frequency multiplication circuit and a frequency multiplication device. The frequency multiplication circuit comprises a first high-voltage switch circuit, a second high-voltage switch circuit and a delay circuit. The application replaces the operational amplifier in the traditional frequency multiplication circuit with the first high-voltage switch circuit, the second high-voltage switch circuit and the delay circuit, can generate a frequency multiplication signal based on a reference pulse signal and an input voltage, and can adapt to a high-voltage environment. Meanwhile, since the frequency multiplication signal is obtained by synthesizing the pulse signals output by the first high-voltage switch circuit and each second high-voltage switch circuit, a single first high-voltage switch circuit or second high-voltage switch circuit only needs to output a pulse in the period of a reference pulse signal, thereby avoiding the problem that a single high-voltage switch circuit cannot directly output a high-frequency signal due to a low switching rate of the single high-voltage switch circuit.

The invention discloses a frequency multiplier and a wireless communication chip, and relates to the field of wireless communication, and the frequency multiplier comprises a phase generation module which is used for generating a plurality of delay signals with a preset phase relation according to an original clock signal, the delay signals comprise a main delay signal and an interpolation delay signal, phases of the main delay signals and the interpolation delay signals are interphase, and the main delay signals and the interpolation delay signals are in one-to-one correspondence; and the signal synthesis module is used for synthesizing the plurality of main delay signals and the plurality of interpolation delay signals to generate a target frequency multiplication signal, and the frequency of the target frequency multiplication signal is N times of the frequency of the original clock signal. According to the invention, high frequency multiplication can be realized, meanwhile, periodic offset and additional noise which are possibly caused by duty ratio correction loop interference are avoided, and the time sequence precision and the spectrum purity of output signals are improved. In addition, a duty ratio correction circuit and a calibration process thereof are omitted, so that the chip area is saved, the power consumption is reduced, and the overall efficiency of the system is improved.

The present disclosure provides a multi-parameter physiological signal processing method, system, edge computing device and storage medium. The multi-parameter physiological signal processing system comprises a device interface module, a device identification module, a signal synthesis module and a controller. The controller is configured to control the device identification module to identify the device information of each physiological signal acquisition device when a plurality of physiological signal acquisition devices access the device interface module, receive target signal type identification information sent by a target device, determine a plurality of target physiological signal acquisition devices from the plurality of physiological signal acquisition devices, and send the device information of each target physiological signal acquisition device to the signal synthesis module. The signal synthesis module is configured to synthesize and process the physiological signals collected by the plurality of target physiological signal acquisition devices, and send the physiological signals to the target device, thereby realizing automatic synthesis of the physiological signals collected by the plurality of physiological signal acquisition devices of the same device type, and improving the efficiency of acquiring physiological signals.

The application discloses a virtual-subarray-based phased array antenna anti-interference receiving system and a design method, belongs to the technical field of adaptive digital beam forming processing, and comprises a phased array antenna; the phased array antenna comprises a plurality of subarrays, the subarrays are regarded as antennas, and each subarray generates a signal through analog synthesis; after each subarray analog synthesis signal is subjected to frequency conversion and sampling, a digital signal is obtained; adaptive beam forming is realized through digital beam forming and MVDR algorithm for the plurality of subarray signals, and interference signals are suppressed. According to the application, the planar phased array antenna is divided through virtual subarrays, and subarray-level signal synthesis processing is adopted, so that the scale of frequency conversion and sampling circuits of independent receiving channels is greatly reduced, and the suppression of interference direction signals is realized in combination with the MVDR algorithm.

The invention relates to the technical field of acoustic electromechanical transducers, and particularly discloses a multi-scene perception adaptive noise reduction method and system, an earphone and a storage medium. According to the scheme, environmental noise is acquired in real time through the noise acquisition module, acoustic characteristics and wearing states of ear canals of a user are analyzed in combination with the individual feature sensing module, a current acoustic scene is judged by the scene recognition module, noise reduction parameters are dynamically adjusted based on the self-adaptive control module, and finally anti-noise is generated through the noise reduction signal synthesis module to offset the noise. According to the method, the personalized and scene-adaptive noise reduction effect can be realized, and the noise reduction depth consistency and the user comfort are improved.

This invention discloses a DC suppression circuit structure, a DC suppression method, and a terahertz heterodyne detection system. The DC suppression circuit structure includes a first nonlinear detection module, a second nonlinear detection module, a phase adjustment module, and a signal synthesis module. The phase adjustment module adjusts the phase of the mixing signal generated by the second nonlinear detection module. The signal synthesis module superimposes the phase-adjusted mixing signal with the mixing signal generated by the first nonlinear detection module. During the synthesis process, the self-mixing DC component is at least partially canceled out, and the intermediate frequency AC component is at least partially superimposed. This invention weakens or cancels the self-mixing DC component during the synthesis process, while allowing the intermediate frequency AC component to be superimposed and output, thereby effectively suppressing the self-mixing DC component in the output signal and improving the stability of the intermediate frequency signal.

This application discloses a CNN-based method and apparatus for broadband signal synthesis. For each broadband signal to be measured, the broadband signal to be measured and a reference broadband signal are input into a prediction model to obtain the predicted delay difference and phase difference. Integer delay compensation is performed on the broadband signal to be measured based on the predicted delay difference. The compensated broadband signal to be measured is divided into multiple sub-bands and fractional delay compensation and phase compensation are performed. All compensated sub-bands are synthesized. The phase difference of each sub-band is calculated, and a phase-frequency curve is constructed and fitted to obtain the residual delay difference and residual phase difference. The initial broadband signal is processed based on the residual delay difference and residual phase difference to obtain the synthesized broadband signal. The prediction model is used to pre-align multiple signals to be measured to reduce the impact of dynamic delay changes. Then, a frequency domain cross-correlation method is used for further alignment to improve the convergence speed of the algorithm in dynamic delay environments, thereby ensuring stability and reliability in complex environments.

A LIDAR system includes a signal director that can direct an outgoing LIDAR signal to any one of multiple different alternate waveguides. Each of the alternate waveguides being associated with a different switch channel in that a light signal that includes light from the outgoing LIDAR signal directed to a particular one of the alternate waveguides can be characterized as carrying the switch channel associated with that alternate waveguide. The LIDAR system is configured to output system output signals that include light from the outgoing LIDAR signals. The system output signals carry different switch channels. The LIDAR system is configured to receive system return signals that each includes light from the system output signals after an object located outside of the system has received and reflected the system output signal. A signal combiner that generates different composite signals by combining light from system return signals that carry different switch channels with a reference signal. Electronics calculate LIDAR data from the frequency of one or more of the composite signals. The LIDAR system being configured to continue to generate a composite signal that carries a first one of the switch channels for a substantial period of time after the imaging system has stopped outputting the system output signal that carries the first switch channel.