18 results about "Reference level" patented technology

The application discloses a signal interference strategy generation method and device based on deep learning, and a medium, and relates to the technical field of signal interference. The method comprises the following steps: calculating initial path rain attenuation values corresponding to reference level sampling data and real-time level sampling data; filtering a wet antenna attenuation component of the real-time level sampling data through digital filtering based on the initial path rain attenuation values, and determining pure path rain attenuation values of each communication link; inverting the pure path rain attenuation values to obtain path average rain intensities corresponding to each communication link; performing spatial interpolation optimization on a preset interference area to determine a two-dimensional rainfall intensity distribution map; calculating signal propagation time delay of an interference target ray track to obtain interference target corrected coordinates; and determining an interference strategy corresponding to the interference target through link interference parameter calculation and interference window prediction. The application solves the technical problem that the signal interference strategy in the prior art cannot meet the dynamic requirements of an interference signal link in a rainfall environment.

The invention belongs to the technical field of integrated circuit design, and particularly discloses a low-delay sampler structure and method for high-speed data processing, and in a pseudo reset stage, an unlocking network module and a pre-latching network module are connected in parallel to form an equivalent low-impedance network unit; the transconductance module is used for inputting a sampling signal and a reference level signal and driving the equivalent low-impedance network unit; the pre-latch network module is used for enabling an output node of the pre-latch network module to start charging and discharging according to a sampling signal and a reference level signal and pre-sampling the sampling signal; meanwhile, in the latching stage, the transconductance module is used for driving the pre-latching network module to preliminarily amplify the sampling signal, and the strong latching network module is used for stably latching the sampling signal under the driving of the pre-latching network module. According to the invention, the sampling delay of the signal is obviously shortened, and meanwhile, the requirement of high-speed data processing on the time sequence progress is met.

A transmitter includes an analog transmission circuit, a power amplifier, a voltage detector, a comparator, and a control circuit. The analog transmission circuit is configured to provide a first gain to a first analog signal, so as to generate a second analog signal. The power amplifier is configured to provide a second gain to the second analog signal, so as to generate an output signal to an antenna. The voltage detector is configured to detect a voltage level of the second analog signal. The comparator is configured to generate an indication signal according to the voltage level and a reference level. The control circuit is configured to adjust the first gain of the analog transmission circuit according to the indication signal.

The invention discloses a broadband intermediate-frequency processing circuit and a control method thereof, and relates to the technical field of electronic measurement, the broadband intermediate-frequency processing circuit comprises double intermediate-frequency channels, the broadband intermediate-frequency channel is 307.2 MHz, the narrowband intermediate-frequency channel is 288MHz, and an intermediate-frequency conditioning circuit comprises a change-over switch, a broadband filter, a narrowband filter and five amplifiers. The method can be applied to the frequency spectrograph in different working modes, and intermediate frequency signal paths corresponding to the broadband are provided; different intermediate frequency channel gains are provided for the frequency spectrograph under different reference levels, a low-power-consumption mode of the system is realized through enabling control of the amplifier, and the requirements under different applications are met.

The application relates to the technical field of integrated circuit signal detection, and provides a baud rate signal detection circuit and a CDR loop structure which are composed of two data samplers, one error sampler and a digital logic circuit, can provide better jitter performance compared with a traditional MMPD, do not need to depend on accurate reference level VRFE amplitude setting, and have relatively lower design difficulty compared with traditional designs. In addition, the signal detection circuit can also detect the frequency deviation between input data and a sampling clock, so that the baud rate CDR function with a wide frequency capture range can be realized by using only a single control loop without increasing additional clock and sampling circuits, external reference clocks are not needed, the difficulty of the performance and cost compromise mentioned above can be greatly reduced, and the overall design cost is greatly reduced.

The application discloses a kind of digital quantity output control's fault identification system and method, the first control unit in the digital quantity output control device in the system, output pin reference level and periodic communication data are sent to the second control unit in the digital quantity output control device, the second control unit, the output pin actual level of first control unit is acquired, whether the pin output fault of first control unit exists according to output pin reference level and output pin actual level judges, realize the detection of pin damage, and, whether the running fault of first control unit exists according to the periodic communication data received judges, realizes the fault detection of the control unit in the digital quantity output control device.The system realizes the fault identification of digital quantity output control, improves the security of digital quantity output control, guarantees the normal operation of the controlled external equipment.

The application discloses a double residual quantization method and application for a multi-stage analog-to-digital converter, the multi-stage analog-to-digital converter comprising a front-stage quantizer, an inter-stage amplifier and a back-stage quantizer; the front-stage quantizer performs preliminary quantization on an input signal and generates a quantization result; two residual signals are generated at the output end of the front-stage quantizer based on the quantization result; the two residual signals contain quantization error information of the front-stage quantizer and reference level information of the front-stage quantizer; the two residual signals are transmitted to the back-stage quantizer after being amplified by the inter-stage amplifier; the back-stage quantizer is designed as a delta-sigma modulator; the back-stage quantizer directly quantizes the quantization error of the front-stage quantizer through the two residual signals; and the reference level information of the front-stage quantizer is introduced into a converted signal according to the conversion result of the back-stage quantization, and is used for updating a back-stage loop filter. The application maintains the robustness of the inter-stage gain error, and realizes high-precision, high-speed and high-energy-efficiency analog-to-digital conversion performance.

The utility model discloses an electrocardio analog signal acquisition circuit for a teaching experiment, which comprises an instrument amplification circuit, a first-stage amplifier, a second-stage amplifier, a first-stage amplifier, a second-stage amplifier, a second-stage amplifier, a first-stage amplifier, a second-stage amplifier and a third-stage amplifier, the band-pass filter circuit comprises an operational amplifier and a resistance-capacitance combination formed by a plurality of capacitors and resistors, and the resistance-capacitance combination formed by the plurality of capacitors and resistors is connected with the operational amplifier; the low-pass filter circuit comprises an operational amplifier and a resistance-capacitance combination formed by a plurality of resistors and capacitors, and the different resistance-capacitance combinations formed by the plurality of resistors and capacitors are connected with the operational amplifier; the level raising circuit comprises a multi-way switch and different resistor combinations, the bias level of an input signal is adjusted through a voltage dividing network, the reference level of a preceding-stage signal is raised to a direct-current level range suitable for subsequent processing, and by arranging an adjustable resistor and capacitor network, collection and conditioning of an electrocardio analog signal are achieved.

A computer-implemented method of processing an audio signal. The method comprises: receiving from two or more microphones, respective audio signals; deriving a plurality of time-frequency signals from the received audio signals, indexed by frequency, and for each of the time-frequency signals: determining in-beam components of the audio signals; and performing post-processing of the received audio signals, the post-processing comprising: computing a reference level based on the audio signals; computing an in-beam level based on the determined in-beam components of the audio-signals; computing a post-processing gain to be applied to the in-beam components from the reference level and in-beam level; and applying the post-processing gain to the in-beam components.

The invention discloses a signal demodulation method, circuit and device, a storage medium and electronic equipment. Relates to the field of signal processing, and the method comprises the steps: obtaining a to-be-demodulated input signal, the input signal employing pulse position modulation; performing comparison processing on the input signal and the delay signal of the input signal through a first comparator to obtain a pulse position modulation signal; comparing the input signal with a reference level through a second comparator to obtain a signal triggering moment level; and under the condition that the level meets the triggering condition at the signal triggering moment, the pulse position modulation signal is demodulated through the single chip microcomputer. According to the invention, the problem that the signal demodulation cost is high when preprocessing of signal demodulation is carried out based on an FPGA chip in the prior art is solved.

This application provides an automatic on-chip clock frequency calibration method and related apparatus. The automatic on-chip clock frequency calibration method includes: a calibration module acquiring a reference clock containing N... ref The reference level for each cycle; the calibration module uses the current clock of the oscillator to calculate the reference level, which contains N values ​​within its width. o One cycle; if the theoretical number of cycles N os With N o If the absolute value of the difference is greater than the set error DN, the calibration module adjusts the frequency control parameter through the parameter adjustment module. The frequency control parameter is used to change the current frequency of the oscillator; N os Based on the reference clock's reference frequency, the oscillator's target frequency, and N... ref Determined; if N os With N o If the absolute value of the difference is less than the set error DN, the calibration module determines that the oscillator calibration is successful. This embodiment of the application can shorten the calibration time for the on-chip clock frequency.

A method comprising: obtaining (601) input video data in an input dynamic range and interoperability metadata; converting (602) the input video data in output video data in an output dynamic range using the interoperability metadata; wherein, the interoperability metadata comprise at least an information representing an HDR reference level value, an information representing an SDR reference level value.

The invention relates to the technical field of circuits, in particular to a current detection circuit and a robot, and the current detection circuit comprises a differential input unit which is used for carrying out the differential detection of a current output by a current source, and obtaining a first differential signal and a second differential signal; the differential filtering unit is connected to the differential input unit and is used for filtering the first differential signal to obtain a signal to be detected and filtering the second differential signal to obtain a reference signal corresponding to the signal to be detected; the comparison unit is connected with the differential filtering unit and is used for performing voltage comparison on the signal to be detected and a reference signal to obtain a comparison result signal; and the output unit is connected with the comparison unit and is used for outputting a current detection signal to the controller based on the comparison result signal. According to the current detection circuit, the reference level input by the comparison unit can be dynamically adjusted according to the differentially input second differential signal, so that the influence caused by the level shift of the ground wire is reduced, and the over-current detection accuracy is improved.

A method and apparatus for decoding a picture from a bitstream are provided.SOLUTION: The method includes decoding, from a bitstream, information indicating a bitrate of the bitstream. The information includes a first syntax element, a second syntax element, and a reference level fraction of the bitstream. The method also includes deriving a bit rate of a sub-picture of the picture based on the information. Deriving the bit rate of the sub-picture includes determining a bit rate of a bitstream as (first syntax element + 1) * 2 (6 + second syntax element) and multiplying the bit rate of the bitstream by a reference level fraction.SELECTED DRAWING: None

This invention discloses an automatic adjustment control method, system, device, and storage medium for coaxial video signals, comprising the following steps: acquiring an analog coaxial video signal; adjusting the amplitude of a set frequency signal therein so that its gain can be controlled by control parameters to obtain an adjusted analog coaxial video signal; converting the adjusted analog coaxial video signal into a discrete digital coaxial video signal; and extracting a reference level value from the digital coaxial video signal according to the quadrature modulation signal demodulation principle. Beneficial effects: It can match the actual attenuation degree of the coaxial video signal under different transmission distances and cable losses without manual intervention, completely solving the signal problems caused by insufficient or excessive compensation in existing fixed gain schemes, accurately offsetting the amplitude attenuation of high-frequency signals caused by long-distance transmission, and ensuring the brightness edge sharpness and color stability of the decoded video image.

The application discloses a signal interference strategy generation method and device based on deep learning, and a medium, and relates to the technical field of signal interference. The method comprises the following steps: calculating initial path rain attenuation values corresponding to reference level sampling data and real-time level sampling data; filtering a wet antenna attenuation component of the real-time level sampling data through digital filtering based on the initial path rain attenuation values, and determining pure path rain attenuation values of each communication link; inverting the pure path rain attenuation values to obtain path average rain intensities corresponding to each communication link; performing spatial interpolation optimization on a preset interference area to determine a two-dimensional rainfall intensity distribution map; calculating signal propagation time delay of an interference target ray track to obtain interference target corrected coordinates; and determining an interference strategy corresponding to the interference target through link interference parameter calculation and interference window prediction. The application solves the technical problem that the signal interference strategy in the prior art cannot meet the dynamic requirements of an interference signal link in a rainfall environment.

The present application relates to the technical field of radar signal processing, in particular to a kind of adaptive distributed radar anti intermittent sampling retransmission interference method, for when encountering intermittent sampling retransmission interference, accurate, stably detect real target, including through the echo of multiple receiving stations signal level interference alignment processing;Optimization algorithm is realized by using simulated annealing-particle swarm search sequence under the optimal site combination intra-pulse phase reference level intermittent sampling retransmission interference cancellation fusion processing and optimization.The method of the present application is by means of the characteristics of high power gain of intermittent sampling retransmission interference and high correlation of homologous interference radiation, the adaptive distributed radar anti intermittent sampling retransmission interference method proposed, has good robustness in the environment of resisting different types of intermittent sampling retransmission interference and different jamming-to-signal ratio, improves the target accurate detection capability in information battlefield confrontation environment.

The present application aims to provide an inspection method capable of determining the bonding state of an electrode to a substrate without contacting the electrode as an inspection object. A coil-embedded probe (1) in an alternating current application state is scanned along the formation direction of an electrode lead (40) as an inspection object. The coil-embedded probe (1) at the time of scanning is not in contact with the electrode lead (40), but is located above the electrode lead (40) at a prescribed distance from the surface of the electrode lead (40). Thereafter, a plurality of detection signals corresponding to a plurality of ultrasonic bonding portions (41) are obtained by an eddy current gauge (3). Finally, based on the comparison results of each of the plurality of detection signals with a reference level, the bonding state of the electrode lead (40) to a substrate (30) is determined. That is, for each of the plurality of ultrasonic bonding portions (41) provided in the electrode lead (40), which state of an unbonded state, a broken state, and a normal state is determined.