43results about "Line balance variation compensation" patented technology

The invention discloses an IQ imbalance blind calibration method and an IQ modulation demodulator, and the method comprises the steps: determining a regularity judgment condition based on the second-order statistical characteristics of a complex signal under an ideal condition; building an IQ imbalance mathematical model to determine a compensation mode; obtaining a compensation coefficient formula based on the compensation mode, the regularity judgment condition and the step diagonal matrix; substituting the complex signal into a compensation coefficient formula to obtain a high-order LMS dual-channel algorithm model; a nonlinear step size error model is introduced into a high-order LMS double-channel algorithm model. The invention provides a frequency-related square difference operation variable step size IQ imbalance dual-channel high-order blind compensation filtering algorithm without any prior information. Algorithm parameters are adjusted according to signal mismatch caused by phase mismatch and amplitude imbalance of input signals, so that the signals keep an ideal orthogonal relation.

The invention discloses a millimeter wave waveguide transmission loss compensation method, which relates to the technical field of millimeter wave waveguide transmission and comprises the following steps of: monitoring multi-dimensional transmission loss in real time: acquiring electrical parameters such as signal amplitude and phase and parameters such as temperature, humidity and structural deformation to ensure data time synchronization; a loss mechanism layering analysis step: distinguishing three types of loss proportions, and determining dominant factors; a self-adaptive compensation strategy matching step: selecting an exclusive or cooperative compensation mode according to the loss type; a dynamic compensation parameter optimization step: adapting a signal frequency to adjust device parameters; a real-time feedback and fine tuning step: comparing signal quality dynamic correction parameters; and a closed-loop iterative optimization step: constructing a mapping model for iterative updating to form a whole-process closed loop. According to the invention, accurate and efficient compensation of millimeter wave waveguide transmission loss is realized, and signal transmission stability and environment adaptability are improved; the system has quick response and long-term operation reliability, and provides support for large-scale application of the millimeter wave technology.

The application discloses a high-speed link signal equalization method based on a three-dimensional memristor type equalizer, which comprises the following steps: obtaining a distorted signal and generating an ideal received signal, and then constructing a data set; training a recurrent neural network by using the data set to obtain a trained weight parameter; obtaining a conductance value matrix in the three-dimensional memristor type equalizer by mapping the weight parameter; deploying the conductance value to the three-dimensional memristor type equalizer according to the conductance value matrix; and finally inputting the distorted signal into the three-dimensional memristor type equalizer to obtain an optimized signal after compensation distortion. Compared with the traditional feedforward equalizer and decision feedback equalizer method, the application effectively reduces the time domain waveform distortion, improves the high-speed signal integrity, has wide applicability, can be used for the training and deployment application of the memristor type equalizer of various complex high-speed links, and deploys the above-mentioned conductance value to the three-dimensional memristor cross array, so as to improve the integrated density and reduce the area occupied by the equalizer.

This invention provides a joint equalization method for signals in fading channels, comprising: obtaining the cost functions of a CMA equalizer and a DD equalizer based on the IQ data before equalization; obtaining the cost function of a joint equalizer based on the cost functions of the CMA equalizer and the DD equalizer; and performing joint equalization processing on the IQ data before equalization to obtain the equalized IQ data. This application has strong practicality and robustness; even with strong channel fading in the signal, it can compensate for the loss, enabling the signal to be demodulated.

The present application relates to the field of signal processing technology and provides an on-chip virtual network analyzer, method, computer device and medium. The on-chip virtual network analyzer establishes a loss model of the first channel in a training mode, and uses the loss model of the first channel in a working mode to adjust the adjustable equalization gain based on the frequency of the input signal and the waveform peak of the output signal detected by the peak detector, so that the amplitude of the output signal is consistent with the amplitude of the input signal, and realizes accurate and reliable judgment on how to perform channel loss compensation and how to amplify or attenuate the signal to adapt to the needs of the lower-level module, which is conducive to improving the overall performance of the system.

The invention provides a same-direction quadrature imbalance compensation method and device, and the method comprises the steps: obtaining a first I / Q calibration result of a radio frequency signal outputted by a radio frequency path under a first calibration gear in a plurality of calibration gears of a first calibration dimension; according to a first I / Q imbalance compensation mode matched with the first I / Q calibration result, converting the first I / Q calibration result into a first mirror image interference amplitude of the radio frequency signal under the first calibration gear; and performing I / Q imbalance compensation on the radio frequency signal by adopting a first I / Q imbalance compensation mode according to the first mirror image interference amplitude, thereby converting the first I / Q calibration result into the first mirror image interference amplitude caused by I / Q imbalance, and performing I / Q imbalance compensation on the radio frequency signal based on the first mirror image interference amplitude obtained by converting the first I / Q calibration result. And the accuracy and effectiveness of I / Q imbalance compensation of the radio frequency signal are improved.

The invention discloses an underwater acoustic communication Doppler compensation method based on kinematics constraint and time-varying resampling, and belongs to the technical field of underwater acoustic communication. The method comprises the following steps: firstly, performing discrete Doppler rough estimation on a received signal; denoising, kinematics constraint abnormal value correction and smoothing processing are carried out on the sequence through cascade filtering; then, a continuous speed curve is constructed by utilizing partition mixed interpolation, and oscillation is suppressed by adopting nearest neighbor interpolation in an edge region; and finally, performing iterative judgment based on the residual index, and establishing a nonlinear mapping relation through full-time-domain integration to perform time-varying resampling on the signal. According to the method, the problem of synchronization failure caused by correlation peak divergence and interpolation boundary oscillation under non-uniform motion is solved, sampling point level waveform recovery under a high dynamic scene is realized, and the robustness and synchronization stability of the system are improved. The method is suitable for the communication field of an underwater mobile platform represented by an unmanned underwater vehicle and a subsurface buoy in a complex marine environment.

The invention discloses a loss compensation method and device, equipment, a storage medium and a product. The loss compensation method comprises the following steps: acquiring waveform characteristic information and wavelength condition information of a received signal; loss compensation is carried out on the received signal through a preset loss compensation model based on the waveform characteristic information and the wavelength condition information, a target signal output by the preset loss compensation model is obtained, and the preset loss compensation model realizes unified modeling of a plurality of working wavelengths based on wavelength data of each wavelength. And in the fusion process, cross-wavelength common features are shared, and meanwhile, a neural network model of specific damage of each wavelength is reserved and compensated. According to the invention, the loss compensation is carried out on the received signal based on the preset loss compensation model which maintains the cross-wavelength common feature and retains and compensates the specific damage of each wavelength, so that compared with the existing mode of respectively training an equalizer for each wavelength to carry out loss compensation, the loss compensation is carried out on the received signal; according to the invention, the number of models for multi-wavelength system equalization can be significantly reduced, and the storage and training complexity is reduced.

The invention discloses a signal insertion loss equalization method and equalization circuit. The method comprises the following steps: respectively carrying out first-stage equalization processing and second-stage equalization processing on an original input signal through a continuous time linear equalizer based on a first equalization parameter and a second equalization parameter to generate an equalized output signal; updating a second equalization parameter according to a preset linear equalization algorithm based on the equalized output signal, and performing decision feedback equalization processing on the equalized output signal through a decision feedback equalizer to obtain a feedback tap coefficient of the decision feedback equalizer; weighting the feedback tap coefficient according to a preset weight to generate a weighted coefficient; and comparing the weighted coefficient with a preset noise threshold, and updating the first equalization parameter according to a preset first strategy or a preset second strategy. According to the invention, the problem of over-equalization caused by taking the second-stage equalization value as the first-stage equalization value in the equalization architecture of the joint equalization signal of the decision feedback equalizer and the continuous time linear equalizer is solved.

The application discloses an IQ imbalance blind calibration method and an IQ modulation demodulator. The method comprises the following steps: determining a regularity judgment condition based on the characteristics of the second-order statistics of a complex signal under ideal conditions; building an IQ imbalance mathematical model to determine a compensation mode; obtaining a compensation coefficient formula based on the compensation mode, the regularity judgment condition and a step diagonal matrix; substituting the complex signal into the compensation coefficient formula to obtain a high-order LMS double-channel algorithm model; and introducing a nonlinear step error model into the high-order LMS double-channel algorithm model. The application provides a frequency-dependent square difference operation variable step IQ imbalance double-channel high-order blind compensation filtering algorithm, and any prior information is not needed. The signal mismatch adjustment algorithm parameters are adjusted according to the phase mismatch and amplitude imbalance of the input signal, so that the signal can maintain an ideal orthogonal relationship.

The present disclosure provides a pre-equalization compensation method and device for a link, a storage medium and an electronic device. The method includes: in response to that an Active Antenna Unit (AAU) is powered on, parsing a prestored off-line compensation table to obtain first non-flatness equalization coefficients of an RF link with a plurality of sub-carriers and second non-flatness equalization coefficients of a wave control link with the plurality of sub-carriers, with each one of the plurality of sub-carriers corresponding to one of the first non-flatness equalization coefficients and one of the second non-flatness equalization coefficients; combining the first non-flatness equalization coefficients of the plurality of sub-carriers and the second non-flatness equalization coefficients of the plurality of sub-carriers to obtain a combined carrier non-flatness coefficient; and performing equalization compensation on the link according to the combined carrier non-flatness coefficient.

The invention discloses a wireless signal channel estimation method in dual-mode power line carrier communication and electronic equipment, and belongs to the technical field of power line carrier communication. The wireless signal channel estimation method in the dual-mode power line carrier communication comprises the following steps: performing frequency domain transformation on an OFDM symbol corresponding to a long training domain to obtain a first frequency domain signal and a first channel estimation result corresponding to the long training domain, and performing frequency domain transformation on an OFDM symbol corresponding to a control word domain to obtain a second frequency domain signal; performing compensation and hard decision processing on the second frequency domain signal to eliminate channel influence, obtaining a processed second frequency domain signal, and obtaining a second channel estimation result corresponding to the control word domain; performing frequency offset estimation based on the first channel estimation result and the second channel estimation result to obtain a final frequency offset estimation result; and / or obtaining a third channel estimation result based on the first channel estimation result and the second channel estimation result. According to the invention, the precision and robustness of channel estimation are improved.

The invention provides a baseline drift correction circuit, a baseline drift correction method and a communication system, and relates to the technical field of communication, the baseline drift correction circuit comprises a compensator, a decision device, an adaptive updater, a low pass filter and a multiplier; the compensator outputs a compensated signal according to the acquired current receiving signal and a previous compensation signal output by the multiplier; the decision device outputs a current decision signal corresponding to the compensated signal; the self-adaptive updater performs self-adaptive updating of the gain and the time constant through a gradient descent algorithm according to the compensated signal and the current judgment signal to obtain the current gain and the current time constant; the low-pass filter outputs a current low-pass filtering signal according to the current time constant and the current judgment signal; and the multiplier outputs a current compensation signal according to the current gain and the current low-pass filtering signal. According to the invention, a gradient descent algorithm is adopted, two-dimensional optimization of gain and cut-off frequency is realized, and the accuracy of offset compensation is improved.

The invention discloses a high-speed link signal equalization method based on a three-dimensional memristor type equalizer, and the method comprises the steps: obtaining a distortion signal, generating an ideal receiving signal, and constructing a data set; training the recurrent neural network by using the data set to obtain a trained weight parameter; performing mapping processing on the weight parameters to obtain a conductance value matrix in the three-dimensional memristor type equalizer; deploying the conductance values to the three-dimensional memristor type equalizer according to the conductance value matrix; and finally, inputting the distorted signal into a three-dimensional memristor type equalizer for processing to obtain an optimized signal after distortion compensation. Compared with a traditional feedforward equalizer and decision feedback equalizer method, the method has the advantages that time domain waveform distortion is effectively reduced, high-speed signal integrity is improved, the method has wide applicability, the method can be used for memristor type equalizer training and deployment application of various complex high-speed links, the conductance value is deployed to a three-dimensional memristor cross array, and the method is suitable for training and deployment application of memristor type equalizers of various complex high-speed links. Therefore, the integration density is improved and the occupied area of the equalizer is reduced.

The present invention relates to the field of information transmission technology, and specifically to a multi-band processing system for electronic communication. The system includes: a signal separation module, a frequency offset compensation module, an amplitude correction module, a phase correction module, and a dynamic feedback adjustment module. In the present invention, signal components are separated by performing band-pass filtering on multiple frequency bands, the short-time power spectral density is calculated to characterize the energy distribution, the normalization coefficient operation enhances the frequency domain equalization, the high-energy component screening reduces the noise interference, and the signal effectiveness is improved. The frequency offset compensation calculates the change rate based on adjacent phase data and eliminates abnormal fluctuations, and adjusts the time-domain coefficient to correct the frequency offset error. The amplitude correction relies on the short-time Fourier transform to screen the maximum amplitude to optimize the signal consistency. The phase adjustment fits the group delay error curve to optimize the compensation parameters. The dynamic feedback optimizes the strategy based on the signal-to-noise ratio trend to enhance the compensation accuracy, and improves the signal transmission quality and stability.

The invention belongs to the field of high-speed signal transceivers, and particularly discloses a continuous time linear equalization circuit with segmented and adjustable compensation intensity. The input signal is processed in parallel through the first gain module and the second gain module, the first gain signal of the full frequency band and the second gain signal after high-pass filtering are generated at the same time, and the first gain signal and the second gain signal are synthesized and output, so that the power loss caused by attenuation and compensation in the prior art is avoided. And the adjustable feed-through network dynamically adjusts the amplitude of the second gain signal based on the differential signal, so that the high-frequency compensation intensity can be accurately controlled in a grading manner. According to the structure, a signal path is simplified, adjustable high-frequency boosting is directly realized, and the limitation of a fixed compensation frequency point is broken through while the power consumption of the circuit is reduced, so that the flexibility and the precision of the compensation frequency point are improved, and the compensation effect is remarkably improved.

The embodiment of the invention provides an IQ imbalance calibration method and device, a signal transmitter and a zero intermediate frequency transceiver, and the method comprises the steps: obtaining a reference baseband signal and a radio frequency signal outputted by an IQ modulation channel based on the reference baseband signal, and converting the radio frequency signal into a modulation baseband signal; reconstructing the modulation baseband signal to generate a baseband feedback signal used for representing distortion of the IQ modulation channel; based on the reference baseband signal and the baseband feedback signal, obtaining a pre-distortion parameter for compensating IQ imbalance; performing pre-distortion processing on the reference baseband signal by using the pre-distortion parameter to generate a baseband pre-distortion signal; and based on the baseband pre-distortion signal, performing imbalance calibration on an IQ modulation channel. As the IQ modulation channel is calibrated, the image rejection ratio and error vector amplitude performance of the output signal can be improved, and the calibration precision of the IQ modulation channel is improved.

The invention discloses an IQ imbalance calibration method and system. The method comprises pre-calibration and fine calibration. During pre-calibration, firstly, M frequency points are selected in a sectional mode, narrow-band calibration is carried out, correlation factors of amplitude imbalance errors and phase imbalance errors of the multiple frequency points are obtained, interpolation fitting is carried out on zero frequency points, and frequency response characteristics in the whole bandwidth are obtained. On the basis, a solution equation is constructed to calculate a filter coefficient, and a filter is designed to compensate the IQ imbalance error. During fine calibration, based on the least square method, the compensation coefficient of the filter is calculated in a real-time and self-adaptive manner, whether iteration is updated or not is judged, iterative filtering is carried out to enhance the stability of the system, and the problem of calibration performance deterioration caused by environmental factors such as temperature change is effectively solved. Compared with traditional narrowband calibration, the calibration system combining pre-calibration and fine calibration has a calibration effect on receiver large-bandwidth IQ imbalance, the adaptive capacity of the calibration system to environment temperature changes is enhanced, and the calibration precision and robustness are improved.

According to the full-band equalization adjustment method and circuit adapting to different medium channel attenuation characteristics provided by the embodiment of the invention, the tangent slope of the ascending section of the equalization frequency response curve can be freely adjusted on the premise that the power consumption and the area are not obviously increased, so that the channel loss of different media and characteristics is met. According to the invention, the equalization capability adjustment of the signal at the Nyquist frequency can be realized, and the equalization compensation capability of the medium-high frequency band can be flexibly adjusted according to different application scenes and different transmission line transmission parameter characteristics on the premise that the equalization capability at the DC gain and the Nyquist frequency is not changed. The problem that a current continuous time linear equalizer (CTLE) is generally neglected is solved, and the eye pattern quality and the signal integrity are optimized.

The application discloses a kind of millimeter wave waveguide transmission loss compensation methods, it is related to millimeter wave waveguide transmission technical field, including multidimensional transmission loss real-time monitoring step, collection signal amplitude, phase and other electrical parameters and temperature, humidity, structural deformation and other parameters, ensure data time synchronization;Loss mechanism hierarchical analysis step, distinguish three kinds of loss proportion, clear dominant factor;Self-adapting compensation strategy matching step, according to loss type select exclusive or collaborative compensation mode;Dynamic compensation parameter optimization step, adapt signal frequency adjustment device parameter;Real-time feedback and fine adjustment step, compare signal quality dynamic correction parameter;Closed-loop iterative optimization step, construct mapping model iterative update, form whole-process closed loop.The application realizes the accurate and efficient compensation of millimeter wave waveguide transmission loss, improves signal transmission stability and environmental adaptability;With fast response and long-term operation reliability, provide support for millimeter wave technology scale application.

The invention discloses a channel equalization method and device based on TCN-BigBird, equipment and a medium. The method comprises the following steps: firstly, obtaining signal sample data in an analog multipath channel, then carrying out signal preprocessing on the input signal sample data, and constructing a two-dimensional real number input tensor; multi-scale short-range interference features are extracted through a TCN module, and long-range interference features are extracted through a BigBird model; and then fusion is carried out through gating residual connection to obtain fusion features, nonlinear transformation is carried out on the obtained fusion features to obtain fused multi-scale time sequence features, and the fused multi-scale time sequence features are mapped to a target output space through full connection to obtain signals after channel equalization. According to the method, the problem of short-range interference can be accurately solved, and the channel equalization effect can be further optimized through long-range dependence modeling. The method has the characteristics of high effectiveness, strong robustness and the like, and still has the advantage of relatively high channel equalization performance under a low signal-to-noise ratio.

An integrated circuit (IC) chip is disclosed. The IC chip includes receiver circuitry having an input pin, a first input circuit coupled to the input pin, and a T-coil compensation circuit to compensate for a first parasitic capacitance associated with the first input circuit. An on-die termination (ODT) circuit is included that is separate from the first input circuit. A circuit including a resistor and an inductor is coupled in series between the T-coil compensation circuit and the ODT circuit. The circuit compensates for a second parasitic capacitance associated with the ODT circuit.

The invention relates to a method for realizing IQ imbalance mirror image leakage calibration. The method comprises the following steps: establishing a mathematical relationship model among mirror image leakage power, a system IQ imbalance parameter and an external compensation amount; carrying out multi-point measurement data acquisition; constructing a nonlinear residual equation set; iteratively solving optimal parameters by adopting a nonlinear least square algorithm; and calculating an optimal amplitude compensation factor and an optimal phase compensation amount. According to the method, the system and the device for realizing IQ imbalance image leakage calibration, the processor and the computer readable storage medium thereof, an accurate image leakage mathematical model is established, only a small amount of image power data under different compensation conditions needs to be acquired, and the image leakage calibration can be realized through an efficient numerical solution algorithm. The inherent amplitude and phase unbalance of the system can be accurately calculated at one time, and the optimal compensation value can be directly determined.

The invention belongs to the technical field of wireless communication and deep learning, and particularly relates to an intelligent anti-interception transmission method based on a full convolutional auto-encoder network. According to the invention, a time-frequency domain combined signal processing scheme is designed through a pre-shared scrambling knowledge base and a pre-shared scrambling mode pattern: at a transmitting end, frequency domain notch, frequency domain scrambling and time domain phase rotation processing are performed on an original signal in sequence, and a transmission signal with time-frequency domain dual disturbance is constructed; and at a receiving end, the legal user sequentially executes time domain phase compensation and frequency domain notch processing based on the shared prior information, and intelligent reconstruction of the signal is realized by using a pre-trained full convolution auto-encoder network. According to the method, by constructing the asymmetric performance advantages of the legal receiver and the third party, it is ensured that the legal receiver can accurately recover the original signal, the third party cannot effectively analyze the signal due to lack of key disturbance parameters and a reconstruction algorithm, and the anti-interception performance of the system is remarkably improved while the communication quality is ensured.

The present application provides a method, a circuit, a chip, a transceiver and a storage system for adjusting equalization parameters. The method includes: obtaining a transmission signal transmitted by a channel; extracting a plurality of equalization features from the transmission signal; determining a required feature set for each equalizer according to the plurality of equalization features, a plurality of channel features of the channel, and current required feature requirements of an equalization network model of at least one equalizer; predicting a plurality of equalization parameters for each equalizer according to the equalization network model of each equalizer and the corresponding required feature set, and transmitting the plurality of equalization parameters to the corresponding equalizer, so that each equalizer performs signal compensation on the received signal according to the corresponding plurality of equalization parameters.

The present disclosure relates to a continuous-time linear equalizer, a signal receiving circuit and a chip, the continuous-time linear equalizer comprising: a main current source; a first auxiliary current source; a second auxiliary current source; a receiver module coupled to the main current source, configured to receive a pair of differential input signals and output a pair of differential main output signals; a third auxiliary current source; a folded signal receiving module coupled to the third auxiliary current source, configured to receive the differential input signals and output a pair of differential auxiliary output signals; and an output load module coupled to the first auxiliary current source, the second auxiliary current source, the receiver module and the folded signal receiving module, configured to receive the differential main output signals and the differential auxiliary output signals, generate equalized differential signals according to the differential main output signals and the differential auxiliary output signals, and provide a pair of zero-poles for the equalized differential signals. The present disclosure realizes rail-to-rail input and high bandwidth application of the continuous-time linear equalizer, and can be controlled to be turned off to save power consumption.

A signal compensation method and apparatus, and a system, belonging to the technical field of communications. In the method, after a sending node sends a first test signal of a first polarization state to a first receiving node on a first baseband frequency, on the basis of a sending parameter corresponding to the first polarization state sent by the first receiving node, the sending node compensates a service signal of the first polarization state to be sent. The first baseband frequency is a frequency preset in a subcarrier corresponding to the first receiving node, the first baseband frequency is different from a center frequency of the subcarrier corresponding to the first receiving node, and the first baseband frequency carries a real signal and an imaginary signal of the first test signal at different moments; the sending parameter corresponding to the first polarization state sent by the first receiving node represents: an imbalance in the sending node between the real signal and the imaginary signal of the first test signal sent by the sending node. The present application can improve a signal transmission effect, and can be used for signal compensation.

The invention relates to a continuous time linear equalizer, a signal receiving circuit and a chip. The continuous time linear equalizer comprises a main current source; a first secondary current source; a second secondary current source; the receiver module is coupled to the main current source and is used for receiving a pair of differential input signals and outputting a pair of differential main output signals; a third secondary current source; the folding signal receiving module is coupled to the third auxiliary current source and is used for receiving the differential input signal and outputting a pair of differential auxiliary output signals; and the output load module is coupled to the first auxiliary current source, the second auxiliary current source, the receiver module and the folding signal receiving module, and is used for receiving the differential main output signal and the differential auxiliary output signal, generating a balanced differential signal according to the differential main output signal and the differential auxiliary output signal, and providing a pair of zero poles for the balanced differential signal. According to the invention, rail-to-rail input and high-bandwidth application of the continuous-time linear equalizer are realized, and closing can be controlled to save power consumption.

The invention provides a joint equalization method for signals under a fading channel, and the method comprises the steps: obtaining a cost function of a CMA equalizer and a cost function of a DD equalizer according to IQ data to be equalized; obtaining a cost function of a joint equalizer according to the cost function of the CMA equalizer and the cost function of the DD equalizer; and performing joint equalization processing on the to-be-equalized IQ data to obtain equalized IQ data. The method and the device have high practicability and robustness, and loss can be compensated even if strong channel fading exists in the signal, so that the signal can be demodulated.