726 results about "Low-pass filter" patented technology

The invention discloses a high-precision current detection circuit calibration system, and belongs to the technical field of current detection circuit calibration. Comprising a shunt resistor, a Hall sensor array, a chopping amplifier, a low-noise operational amplifier, a temperature sensor, an ADC acquisition unit, an RC low-pass filter, a signal conditioning unit, a main control unit, an environmental parameter adaptive compensation module and a gain adaptive adjustment module. After an original signal is obtained from a multi-channel sensor, a dynamic error model is constructed in combination with temperature data, a long-term imbalance trend is extracted by using a moving average or median filtering algorithm, and real-time compensation is performed through a pre-calibrated temperature-drift function, so that the system maintenance period is remarkably prolonged.

The invention discloses a method for improving the stability of a system for sending out deep and far sea wind through a dual-port light converter. The method comprises the following steps: introducing a voltage feed-forward path comprising a phase compensator and a low-pass filter into an MMC differential mode control loop in the dual-port light converter; and a compensator parameter feasible region is calculated based on the phase characteristics of the oscillation risk frequency band, and the cut-off frequency of the filter is set, so that targeted phase compensation and impedance remodeling are realized, and the damping of the dual-port light converter is effectively enhanced. According to the method, the impedance characteristic of the dual-port light-weight current converter in the oscillation risk frequency band is remarkably improved, and a reliable technical path is provided for improving the stability of the dual-port light-weight current converter.

The present invention relates to the fields of PID control and Kalman filtering, and disclosed is an improved PID control method based on Kalman filtering. The present invention comprises: in the process of acquiring a target value of an expected signal, taking the difference between the target value and a current feedback quantity of a controlled object to obtain an error value, acquiring an output of PID from the error value, applying the output of PID to the controlled object to obtain a noisy output signal, then, after Kalman filtering, feeding the output back to PID, continuously iterating to make the feedback quantity approach the target value, and finally obtaining a stable output signal. Variable-speed integration and integral separation algorithms are added to an integral term of PID to change an integration speed on the basis of a system deviation, and an incomplete differential algorithm and a low-pass filter are added to a differential term of PID to prevent high-frequency interference. According to the present invention, the optimal estimation of a system state is obtained by means of prediction of a current state and updating of observation data, thereby reducing the influence of measurement errors and noise, and improving the performance and stability of a PID controller.

The invention discloses a specific grid-connected current harmonic suppression method and device for an energy storage converter, and belongs to the technical field of power systems, and the method comprises the steps: obtaining a given current value of a fundamental current loop, and carrying out the dq / abc conversion to obtain a three-phase current reference value; acquiring a three-phase current value of a power grid side, and subtracting the three-phase current value from the three-phase current reference value to obtain a harmonic current value; converting the harmonic current value to a target subharmonic synchronous rotating coordinate system to obtain a target subharmonic current value; extracting the target sub-harmonic current value in a direct current form through a low-pass filter, and sending the target sub-harmonic current value to a PI regulator for regulation to obtain a harmonic voltage compensation amount; and injecting the harmonic voltage compensation amount into a modulation wave to realize suppression of the target subharmonic current. According to the invention, the grid-connected side current harmonic of the energy storage converter can be effectively suppressed, and the grid-side current quality is improved.

The invention discloses a wind power energy storage output power control method, belongs to the technical field of power system control, and particularly relates to smooth control of wind power plant output power. The method solves the problem that a power grid is unstable due to power fluctuation during grid connection of the wind power plant and the technical problem that a traditional fixed parameter control method cannot adapt to wind power fluctuation changes in a self-adaptive mode. According to the technical scheme, output power of a wind power plant is monitored in real time through a data acquisition system; calculating an output power standard deviation of the wind power plant in the sliding time window based on the collected power data; adjusting the time constant of the low-pass filter by inquiring a predefined standard deviation time constant mapping table according to the output power standard deviation; and filtering the real-time output power of the wind power plant by using the adjusted low-pass filter to generate a smooth power reference value. The method is mainly used for realizing smooth control of wind power plant output power and improving power grid stability.

Approaches presented herein provide for the high quality, high resolution reconstruction of a sequence of decimated images, such as may be useful for remote desktop applications. The video frames can be sub-sampled or decimated such that each encoded frame only includes a fraction (e.g., ¼) of the total pixel values for the full resolution frame. A server can analyze the current and previous video frames at full resolution to determine motion or actionable changes, and can apply a lowpass filter to those values based on the type of interpolation to be performed on the client. Static values can remain where no motion is detected. When a client receives the decimated and encoded video frames, the client can determine areas of motion and can perform bilinear interpolation for only those portions of the image where motion is detected, and can otherwise perform weaving of the static pixel values received over a limited sequence of decimated video frames.

A method for operating a drive unit of an electric bicycle includes (i) determining a rider torque signal, which is based on a rider torque generated by way of muscle power of a person riding the electric bicycle, (ii) first filtering of the rider torque signal by way of a first low-pass filter, (iii) second filtering of the rider torque signal by way of a second low-pass filter, and (iv) generating, in a controlled manner, a motor torque by way of the drive unit as a function of the rider torque signal filtered by way of the second low-pass filter.

A high-speed, low-noise laser signal detection apparatus, comprising a low-noise linear regulated power supply and a laser detection processing module. The low-noise linear regulated power supply (01-03) comprises an isolation unit (01), a voltage regulation and filtering unit (02), and a reference unit (03). The laser detection processing module (04-09) comprises a laser light signal detection input unit (05), a bias unit (04), a differential amplification unit (07), an active filtering unit (08), and an output interface unit (09). An output end of the voltage regulation and filtering unit (02) is connected to the reference unit (03) and the laser detection processing module (04-09). The reference unit (03) is connected to the bias unit (04) and is configured to provide a reference voltage to the bias unit (04). The bias unit (04) is configured to provide a bias voltage to the differential amplification unit (07). The differential amplification unit (07) comprises a multi-stage in-phase proportional differential amplification circuit, and the active filtering unit (08) comprises a multi-order active low-pass filter. According to the high-speed, low-noise laser signal detection apparatus, the detection bandwidth of a laser signal can be expanded, the signal-to-noise ratio of high-frequency pulse measurement can be reduced, and the anti-interference characteristics of a power supply can be improved.

The invention relates to the technical field of amplifiers, and discloses an analog-to-digital converter combination instrument amplifier which comprises a first-stage amplifier, the first-stage amplifier is in signal connection with a second-stage amplifier, the second-stage amplifier is in signal connection with a front-end low-pass filter (LPF), the front-end low-pass filter (LPF) is in signal connection with an analog-to-digital converter (ADC), and the analog-to-digital converter (ADC) is in signal connection with the analog-to-digital converter. And an unbalanced input-to-balanced differential circuit output module is arranged between the second-stage amplifier signal and a front-end low-pass filter (LPF). From the perspective of signal processing and conversion, a precise signal transition bridge is constructed by adding an unbalanced input-to-balanced differential circuit output module, unbalanced signals output by a second-stage amplifier are converted into double-end balanced differential signals, common-mode noise interference is effectively resisted through a differential transmission mode, the signal purity is guaranteed, and the signal quality is improved. The front-end low-pass filter and the analog-to-digital converter are adaptive to differential signals, so that the signal transmission is stable and anti-interference, and the analog-to-digital conversion is more accurate.

The invention relates to a low-noise high-precision pressure measuring circuit which comprises a bridge type sensor, an alternating-current excitation signal source, a phase-sensitive detector, a low-pass filter, a reference signal source and a signal conditioning amplifier. The alternating current excitation signal source modulates a differential voltage signal generated by the bridge type sensor to a high-frequency alternating current excitation signal generated by the alternating current excitation signal source to obtain a high-frequency pressure signal; the high-frequency pressure signal is amplified by the signal conditioning amplifier to form a modulated signal; the phase-sensitive detector performs frequency mixing on the modulated signal and a reference signal generated by a reference signal source to obtain a frequency mixing signal; the frequency mixing signal is filtered by a low-pass filter to form a direct-current voltage signal for pressure measurement; the reference signal generated by the reference signal source and the high-frequency AC excitation signal generated by the AC excitation signal source have the same frequency. According to the circuit, signals are modulated to a high-frequency area with low noise energy to be processed by adopting alternating-current excitation and coherent detection technologies, the signals and noise are effectively separated, and extremely high measurement resolution and precision are achieved.

The invention discloses a single-port detection resonator resonant frequency on-line real-time measurement system for an MEMS gyroscope, and the system comprises a closed-loop drive circuit which is used for driving a resonator to resonate and outputting a drive detection signal; the first C / V conversion circuit converts the current into a detection voltage signal, and the on-off of the first C / V conversion circuit and the negative resistance circuit is controlled by a voltage control switch; the negative resistance circuit enables the equivalent input resistance of the first C / V conversion circuit to be a negative value so as to generate positive damping feedback force on the detection resonator; the multiplier is used for carrying out multiplication demodulation on the detection voltage signal and the driving detection signal, and the angular velocity of the MEMS gyroscope is output after the signals are filtered by the low-pass filter; the upper computer controls the on-off of the voltage control switch, the frequency fd and the frequency fs are calculated through fast Fourier transform by driving the detection signal and the detection voltage signal respectively, the frequency difference is obtained by solving the difference, and the resonant frequency of the single-port detection resonator is measured on the premise that the work of the MEMS gyroscope is not affected.

The invention discloses a fractional frequency division frequency synthesizer with output signal phase synchronization and frequency modulation continuous wave functions, and the basic structure is a charge pump phase-locked loop. Comprising a phase frequency detector, a first charge pump, a second charge pump, a low-pass filter, a voltage-controlled oscillator, a first buffer, a second buffer, a two-frequency divider chain, an IQ undersampling circuit, a local oscillator generator, a programmable multimode frequency divider, a Delta-Sigma modulator (DSM), a first selector, a second selector, a third selector, a tracking phase accumulator, a numerical control oscillator, an accumulation phase difference register and an atan2 logic circuit. The device comprises a main phase control circuit, a phase adjusting circuit, an enabling control circuit, a waveform generator and a serial peripheral interface. The decimal frequency-division frequency synthesizer can be applied to a general-inductance integrated system, ensures that output signals provided by a plurality of decimal frequency-division frequency synthesizers are consistent in phase in a multi-channel radio frequency transceiving system adopting a multi-chip splicing mode, and can also be applied to the general-inductance integrated system as a sensing signal source; and the speed and the distance of an object can be quickly sensed by the high linearity and the quick chirp capability of an output signal. The decimal frequency division frequency synthesizer is applied to a linear frequency modulation continuous wave radar system, initial phase synchronization can be carried out firstly, then frequency continuous modulation is carried out, and measurement errors can be eliminated. In view of functional similarity of partial modules of the synchronous loop and the FMCW loop, such as a phase frequency detector, a charge pump, a voltage-controlled oscillator and the like, the modules can be shared, so that the power consumption and area cost of the system are remarkably reduced.

The invention discloses a PMSLM adaptive optimization harmonic current suppression method based on a multi-rotating coordinate system. According to the method, high-precision extraction of target harmonic waves is realized through a multi-rotating reference coordinate system and a complex coefficient filter; an adaptive moment estimation algorithm (AdamW) with weight attenuation is used to quickly solve an optimal harmonic reference current; and harmonic compensation voltage is output by combining the zero static error characteristic of the proportional resonance PR controller, so that the harmonic current is effectively suppressed. The harmonic current of the permanent magnet synchronous linear motor is quickly and effectively suppressed through a harmonic injection method adopting a multi-rotation reference coordinate system, a complex coefficient filter and an AdamW optimization algorithm. The inherent defects of large phase lag and slow dynamic response when a low-pass filter is used in a traditional harmonic current injection method can be effectively overcome by adopting a complex coefficient filter for current extraction; and an AdamW optimization algorithm is adopted to suppress overfitting through a weight attenuation strategy, and an optimal solution is efficiently and stably obtained.

The invention discloses a rapid power calculation method suitable for an electric energy meter and an acquisition terminal, the electric energy meter and the acquisition terminal, and relates to the technical field of electric power measurement. According to the method, voltage and current signals are sampled, direct-current components are removed, and harmonic interference is suppressed through band-pass filtering; estimating the frequency of the power grid in real time by using zero-cross detection and linear interpolation; processing the filtered voltage and current signals by adopting a delay cancellation model based on a rotation matrix, and eliminating a negative frequency component to generate a corresponding orthogonal vector; and synchronously calculating active power and reactive power through algebraic operation according to the orthogonal vector. According to the method, establishment time delay introduced by a traditional low-pass filter is avoided, rapid tracking of a power value can be achieved when the load power is subjected to step change, electric energy metering deviation in the transient process is effectively reduced, and meanwhile calculation accuracy and robustness under the power grid frequency fluctuation working condition are improved through a frequency self-adaption mechanism.

The invention relates to the technical field of automation control, and discloses a brushless motor energy-saving control adjustment method and system, a controller and a storage medium, and the method comprises the following steps: S1, collecting the operation state information of a motor: collecting the operation state information, including current, voltage, temperature and load data, of the brushless motor in real time; s2, dynamic modeling and numerical solution: constructing a dynamic model of the brushless motor system based on the acquired running state information, and modeling by adopting a high-order differential equation set; s3, constructing a control cost function; s4, deducing an optimal control strategy; s5, approximately solving a control strategy; s6, adjusting and executing control parameters; and S7, performing feedback and parameter correction. By introducing the low-pass filter, the control change rate constraint and the rolling optimization mechanism, the dynamic closed-loop control effect of more stable control, more accurate feedback and more synchronous response is realized.

The invention discloses a converter feedforward decoupling control method and system for improving low voltage ride through capability, and the method comprises the steps: firstly carrying out the dynamic lead compensation of a measurement voltage after d-q conversion, so as to actively offset the amplitude attenuation and phase delay introduced by hardware links, such as a low-pass filter, in a measurement link, and restore a real power grid voltage dynamic state; and based on the accurately compensated and corrected voltage signal, positive and negative sequence separation and feed-forward quantity calculation are carried out, and finally a reference voltage instruction is generated. In this way, it can be ensured that the input signal of feedforward control accurately reflects the instantaneous change of the power grid voltage, the dynamic response speed and precision of a control system are greatly improved, current overshoot and oscillation in the voltage drop period are effectively restrained, the low-voltage ride-through capacity of a converter is remarkably enhanced, and the stability of new energy grid connection is guaranteed.

The invention discloses a swimming skeleton point coordinate data denoising method and device based on spatio-temporal topological structure learning, and belongs to the field of data processing. The method comprises the following steps: acquiring and splicing a swimming video of a target object; detecting a target object in the video, and obtaining skeleton point coordinates and corresponding confidence scores of the target object by adopting a posture estimation model; preprocessing the coordinates to obtain feature vectors; adjacency information of each skeleton point is obtained based on the human body skeleton topology, the feature vectors of all the skeleton points are input into a spatial domain noise removal network, the adjacency information of the skeleton points is aggregated, multi-scale pooling is carried out, and denoised spatial domain features are obtained; sampling the high-dimensional spatial-temporal characteristics by adopting a deformable time convolutional network; and carrying out deformable convolution operation and decoding operation on the sampling features to obtain skeleton point coordinates after time-space domain denoising. Linear and nonlinear noise in data is processed in a time-space domain in a cooperative manner, so that the limitation of a traditional low-pass filter method and an existing ST-GCN method is effectively overcome.

A digital signal processing method is for enhancing fidelity of equivalent-time waveform measurements. The method includes receiving a digitized equivalent-time waveform of a repeating signal under test (SUT), applying a low-pass filter to the digitized equivalent-time waveform to obtain a smoothed waveform, generating a residual waveform by subtracting the smoothed waveform from the digitized equivalent-time waveform, estimating contributions of multiple noise sources in the residual waveform using a regression model, computing target noise and jitter values by removing known intrinsic contributions, and reconstructing a corrected waveform by combining the smoothed waveform with a scaled version of the residual waveform, wherein the scaling is based on the target noise source contributions.

The invention discloses a frequency-locked loop of a self-adaptive delay signal elimination filter, which comprises a first filter, a second filter, a Park transformation module, a low-pass filter, an amplitude normalization module, an inverse Park transformation module, a frequency estimation module and a low-pass filter, and is characterized in that the first filter is used for eliminating higher harmonics, the second filter is used for eliminating low-order single harmonics, and the amplitude normalization module is used for normalizing the amplitude of the inverse Park transformation module. A signal passing through the filter is converted into a direct current component under a dq coordinate system through the Park conversion module, high-frequency clutter is filtered out through the low-pass filter, then the signal enters the amplitude normalization module, the signal amplitude is standardized to be 1, the signal is recovered into an alternating current signal through the reverse Park conversion module, the alternating current signal is input into the frequency estimation module, and the frequency estimation module estimates the frequency of the signal. And finally, a stable power grid frequency estimation value is obtained after processing by a low-pass filter. The invention aims to eliminate rounding errors and introduce a novel prefilter with relatively small time delay, so that the dynamic and steady-state performance of the first-order frequency-locked loop is improved.

The invention discloses a static scene three-dimensional reconstruction method based on three-dimensional Gaussian splashing, and belongs to the technical field of three-dimensional reconstruction in the technical field of artificial intelligence. Performing data preprocessing on the data of the scene; the data preprocessing comprises the following steps: extracting a camera attitude and initial point cloud information by adopting a sparse reconstruction step; constructing a three-dimensional model by adopting an improved 3D Gaussian splash reconstruction method; the improvement method comprises a self-adaptive low-pass filter improvement method and a Gaussian kernel anisotropic shape regularization loss improvement method. According to the invention, a non-professional user can quickly and accurately complete three-dimensional reconstruction of a static indoor scene; meanwhile, the efficiency and the quality of three-dimensional reconstruction are improved; the method is suitable for scenes needing instant data and high-quality reconstruction.

The utility model discloses a Ka wave band frequency source based on a phase-locked loop structure, which comprises a master controller, a crystal oscillator module, a phase-locked loop module and a frequency doubling processing module, and the phase-locked loop module is respectively connected with the master controller, the crystal oscillator module and the frequency doubling processing module. The phase-locked loop module comprises a power supply module, a phase-locked loop main chip, a loop filter module and a locking state indication module, and the phase-locked loop main chip is respectively connected with the power supply module, the loop filter module, the locking state indication module and the main controller; the frequency doubling processing module comprises a low-pass filter, a high-pass filter, a fixed frequency attenuator, a power amplifier, a frequency doubling chip and a band-pass filter which are connected in sequence, and the input end of the low-pass filter is connected with the output end of the voltage-controlled oscillator. The frequency output by the phase-locked loop module is input to the frequency multiplication processing module, and the frequency multiplication processing module carries out harmonic suppression, attenuation, amplification and frequency multiplication processing on the input frequency, so that the output frequency has the advantages of low phase noise, wide frequency band and high stability.

The utility model relates to the technical field of die bonder detection circuits, in particular to a sensor detection circuit for a die bonder, which comprises a master control module, a sensor interface module, a display control module, a signal processing module and a power supply module. The power supply module is used for supplying power to the main control module, the sensor interface module and the display control module; the sensor interface module and the display control module are respectively connected with the main control module; the main control module comprises a main processor and an auxiliary processor, the signal processing module comprises an AD7730 chip, the input end of the AD7730 chip is connected with a low-pass filter, and the main processor is connected with the auxiliary processor through an SPI interface. According to the utility model, a plurality of sensor interface circuits are arranged and can be used for high-speed and high-precision data detection of the die bonder, so that high-speed, low-noise and rapid system response of the die bonder is met, the connection complexity of the die bonder sensor is reduced, and the requirements of high precision and high sampling rate of the die bonder sensor are met.

This application discloses an automatic calibration circuit and method for mismatch compensation current of a phase-locked loop (PLL) charge pump, relating to the field of integrated circuit technology. The calibration circuit includes: a frequency and phase detector, a charge pump, an XOR module, a filter capacitor, a digital-to-analog converter (DAC) module, and a digital logic state machine. The first output terminal of the frequency and phase detector is connected to the first input terminal of the charge pump and the first input terminal of the XOR module, respectively. The second output terminal of the frequency and phase detector is connected to the second input terminal of the charge pump and the second input terminal of the XOR module, respectively. The output terminal of the XOR module is connected to the first terminal of the filter capacitor and the input terminal of the DAC module, and the second terminal of the filter capacitor is grounded. The output terminal of the DAC module is connected to the input terminal of the digital logic state machine, and the output terminal of the digital logic state machine is connected to the third input terminal of the charge pump. The output terminal of the charge pump is used to connect to the input terminal of the low-pass filter in the PLL. This application can compensate for the mismatch current of the charge pump in real time.

Cell selection circuit is provided between n cells connected in series, where n is an integer of 2 or more, and inductor, and is provided at both ends of the selected cell and both ends of inductor can be conductive. Clamp circuit includes at least one clamp switch for forming a closed loop including inductor in a state where cell selection circuit does not select any cells. Current detection circuit detects the value of the current flowing through inductor. Low-pass filter band-limits the detection value. Overcurrent detection circuit activates the protection of inductor when the band-limited detection value exceeds the threshold.

This invention relates to a method for measuring the stability margin of a constant-temperature hot-wire anemometer based on in-situ open-loop frequency characteristics, belonging to the field of fluid measurement and automatic control technology. The method disclosed in this invention includes the following steps: S1. Connecting an ultra-low frequency low-pass filter to the closed-loop circuit to form an in-situ open-loop system with a DC closed loop and an AC open loop; S2. Injecting a sweep frequency excitation signal E at the bias circuit. stimu And measure the output response E of the amplifier circuit. a By comparing the amplitude ratio and phase difference of the two, the open-loop frequency response G of the system under actual operating conditions of the hot wire is obtained. open (jω); S3. According to G open (jω) Obtain the phase margin of the system and determine its stability. This invention proposes a new method for measuring the stability margin of a constant-temperature hot-wire anemometer, transforming the complex system stability problem into a measurable and analyzable open-loop frequency characteristic stability margin problem, providing a direct and reliable engineering basis for the circuit design of constant-temperature hot-wire anemometers.

A physical quantity sensor assembly, an inclinometer, and a structure monitoring device are provided, offering a technique for correcting nonlinearity in the output signal of the physical quantity sensor without increasing the size of the physical quantity sensor assembly. The physical quantity sensor assembly (1) comprises: a frequency-varying physical quantity sensor (3) whose frequency varies according to the change of the physical quantity; a reference signal oscillation unit (5) that outputs a reference signal; a frequency Δ-Σ modulation unit (10) that generates a frequency Δ-Σ modulated signal by frequency Δ-Σ modulation of the reference signal using an action signal based on the measured signal output by the frequency-varying physical quantity sensor (3); a first low-pass filter (20) disposed on the output side of the frequency Δ-Σ modulation unit (10) and operating synchronously with the measured signal output by the frequency-varying physical quantity sensor (3); and a second low-pass filter (60) disposed on the output side of the first low-pass filter (20) and operating synchronously with the reference signal.

A zero intermediate frequency receiver and wireless communication equipment, the zero intermediate frequency receiver comprises a direct current offset correction circuit and a data receiving link, the data receiving link comprises a trans-impedance amplifier, a low pass filter, a programmable gain amplification circuit and an analog-to-digital converter which are connected in series, the DC offset correction circuit comprises a control module, a first correction module, a second correction module and a third correction module. And the control module is suitable for determining a first target calibration value, a second target calibration value and a third target calibration value based on the DC offset on the data receiving link, outputting the first target calibration value to the first correction module, outputting the second target calibration value to the second correction module, and outputting the third target calibration value to the third correction module. According to the scheme, high-precision correction of the zero intermediate frequency receiver can be realized.

The invention discloses a thermocouple dynamic temperature signal processing method. The method comprises the following steps: dividing an original temperature signal into an initial section, an ascending section for reflecting dynamic response of a thermocouple and a final steady-state section; setting a threshold value for the initial section temperature signal to identify a signal significant fluctuation point; filtering local signals of 20 sampling points before and after the significant fluctuation point through a low-pass filter, and then replacing an initial section in the original temperature signal; carrying out signal feature reconstruction on the whole-section temperature signal after the initial section is replaced by adopting wavelet transform; performing down-sampling processing and first-order difference calculation on the temperature rising section and the steady-state section to obtain a differential signal reflecting the temperature change rate, and filtering the differential signal by a low-pass filter; adopting a sliding window to carry out mean filtering to determine a temperature steady-state feature point; down-sampling inverse transformation is carried out on the temperature signal, and fitting is carried out on the temperature rising section rising model to replace the temperature rising section in the original signal; and the accuracy and reliability of thermocouple temperature signal processing are effectively improved.

This invention discloses a pilot-type carrier phase recovery circuit and a reverse antenna array system, belonging to the field of 5G millimeter-wave communication. The pilot-type carrier phase recovery circuit includes a digital phase detector, a quadrature mixer, a quadrature voltage-controlled oscillator, a low-pass filter, a high-pass filter, a polyphase filter, a loop filter, a first intermediate frequency amplifier, a second intermediate frequency amplifier, a first shaping circuit, and a second shaping circuit. Applied to a reverse antenna array system, this invention performs carrier phase recovery on the data signal and pilot signal output from the receiver, separating the data signal without spatial phase information and the spatial phase information used for reverse transmission. This invention enables high-order modulation full-duplex communication and real-time tracking of moving targets, featuring high integration, small area, high communication speed, and strong anti-interference capability.

The low-temperature drift high-power noise suppression band gap reference circuit disclosed by the application comprises a starting circuit, a pre-stabilization circuit, a curvature compensation circuit, a core band gap reference circuit and a low-pass filter circuit, the starting circuit is used for power-on starting of the pre-stabilization circuit and the core band gap reference circuit, the pre-stabilization circuit is used for filtering a part of power ripples in advance and supplying power for the core band gap reference circuit, the curvature compensation circuit and the low-pass filter circuit, the curvature compensation circuit is used for injecting and extracting exponential currents respectively in the high-temperature section and the low-temperature section to complete temperature curvature compensation in different temperature sections, and the low-pass filter circuit is used for completing power ripple suppression in the high-frequency section. The low-temperature drift high-power noise suppression band gap reference circuit realizes high-order curvature compensation in a wide temperature range of high and low temperatures, so that the temperature drift is effectively reduced in the whole temperature range, thereby reducing the power consumption of the circuit and significantly improving the precision of the voltage reference. And the PSR of the circuit is greatly improved.