163 results about "Interference cancelation" patented technology

The invention provides an electromagnetic detection system based on a sea-bottom crawler, belonging to the field of geophysical exploration technology, comprising: a survey vessel, a sea-bottom crawler, a transmitting antenna, a receiving node array, a control chip, and a power supply; the survey vessel is connected to the sea-bottom crawler through a traction rope, and the tail of the sea-bottom crawler is provided with a drag cable, on which the transmitting antenna and the receiving node array are mounted, and both the control chip and the power supply are configured in the integrated electronic cabin of the sea-bottom crawler; the power supply provides electrical energy to the sea-bottom crawler, transmitting antenna, receiving node array, and control chip, and the control chip is electrically connected to the transmitting antenna, the receiving node array, and the power system of the sea-bottom crawler; the control chip is configured to have an electromagnetic detection interference compensation module for performing interference elimination and compensation on reflected waves received by the receiving node array. It solves the technical problem of insufficient detection accuracy in existing technologies.

The invention relates to the technical field of contact resistance detection, in particular to a contact resistance detection method for data line connection stability, and the method comprises the steps: applying high-frequency pulse excitation, obtaining excitation response signals under to-be-detected and standard states, carrying out dynamic impedance modeling decomposition, and extracting an impedance component to be analyzed and a standard impedance component. Constructing an impedance peak position difference change coefficient based on a difference change trend and an average level of time corresponding to an impedance peak position, and calculating a contact interference factor of each component; meanwhile, the fluctuation consistency is evaluated by using the information entropy of the impedance peak amplitude difference, and the impedance amplitude difference consistency is determined. And combining the two to construct a superposition interference characteristic value, screening effective impedance components with small interference, and performing dynamic fusion to obtain a dynamic impedance spectrum after the contact interference is eliminated. And finally, high-precision transient calculation of the contact resistance is realized through a dynamic impedance-resistance conversion model.

Provided is a method (300) and a successive interference cancellation (SIC) based multi-user uplink receiver (200) for multi-user uplink transmission. The method comprises receiving (302) signal of one or more multiple-access (MA) scheme waveforms by a plurality of antennas (202.1, . . . , 202.R) from one or more users. The method further comprises determining (304) one or more effective channel matrices corresponding to the plurality of antennas. Thereby, the method comprises performing (306) channel equalization for signal received in a corresponding antenna by an effective channel matrix. Furthermore, the method comprises combining (308) the channel equalized signal. Subsequently, the method comprises detecting (310) Correctly Decoded Code Blocks (CCBs) and Wrongly Decoded Code Blocks (WCBs). Upon detecting CCBs and WCBs, the method comprises performing (312) the SIC on received signals from one or more users until all WCBs are converted to CCBs or a maximum number of threshold iterations are completed.

The present application relates to the technical field of neutron flux measurement, and particularly relates to a neutron flux measurement interference elimination system and method, which comprises: a detection unit for detecting neutron flux and sending an initial measurement signal; a reference signal generation unit for generating a reference signal; a transmission unit for transmitting the initial measurement signal, the initial measurement signal being interfered to form an interfered measurement signal during transmission; and a processing unit for receiving the interfered measurement signal and the reference signal, and obtaining the initial measurement signal according to the reference signal and the interfered measurement signal. The present application collects the interference signal during transmission of the measurement signal as the reference signal or generates the reference signal by simulating the known interference signal, and then eliminates the interfered measurement signal based on the offset algorithm, so as to restore the real and accurate neutron flux measurement signal.

Embodiments of the present disclosure relate to a user equipment apparatus, method, and computer program for self-interference cancellation The UE apparatus comprises a first transmit chain (210) comprising a power amplifier, PA, (211) and a coupler (213) connected serially, a second transmit chain (220) comprising a PA (221) and a coupler (223) connected serially, and an interference cancellation circuit (230) configured to feed an output signal of an aggressor transmit chain back to an input terminal of a PA in a victim transmit chain to cancel interference of the aggressor transmit chain with the victim transmit chain, wherein the aggressor transmit chain is one of the first transmit chain (210) and the second transmit chain (220) causing the interference, and the victim transmit chain is another one of the first transmit chain (210) and the second transmit chain (220) subject to the interference.

The invention relates to the technical field of wireless optical communication, particularly discloses a multi-user retro-reflection light sensing integration method and system, and aims to solve the problem that retro-reflection light sensing integration in a multi-user scene is not realized yet, a transceiver is utilized to modulate a multi-user input bit to generate a fusion signal, and a light source is driven to emit a light signal; when the user receiver demodulates and recovers the communication bit, the optical signal is retroreflected and recovered to the transmitter; and the transceiver detects the superposed retroreflection signal, performs joint sensing with the transmitted signal, and estimates the distance from each user to the transceiver by adopting a cross-correlation calculation and interference elimination technology. According to the method and the system, a multi-user scene-oriented retroreflection light sensing integrated function is realized, communication and sensing services are simultaneously provided for a plurality of users by utilizing wireless light transmission, and the method and the system have a wide application prospect in the field of wireless light communication.

The present application belongs to the technical field of radio frequency microwave integrated circuit design, and specifically relates to a wideband full duplex receiver sharing an interference cancellation circuit. The full duplex receiver of the present application is composed of a receiver module and an interference cancellation circuit. The receiver comprises a transconductance, a mixer, a transimpedance amplifier and a frequency conversion loop. The interference cancellation circuit comprises an input matching network, an input down-mixer, a quadrature selection phase shifter and a baseband variable gain low-pass filter. The interference cancellation circuit transfers the adjustment of the delay and gain in the radio frequency domain to the baseband, so that the overall area and power consumption are small, and the delay amount of 3.86-8.33 ns can be realized in a wide radio frequency band of 0.5-3.5 GHz. Meanwhile, the interference cancellation circuit is synthesized by the mixer in the frequency conversion loop of the receiver to form a double-path cancellation mode, which avoids the interference cancellation circuit being directly connected to the front end of the receiver module, and the noise figure deterioration of the receiver module is very small, only 0.9-1.2 dB.

The invention provides an audio processing method and device, a vehicle machine and a medium, and relates to the technical field of vehicle-mounted audios, and the method comprises the steps: carrying out the wake-up word detection of at least two paths of audio signals; the at least two paths of audio signals comprise an external audio signal and an internal audio signal; detecting a wake-up word, and performing interference elimination on the audio signal to obtain a first target audio signal of the audio signal outside the vehicle and a second target audio signal of the audio signal inside the vehicle; determining a target sound source area through a cross attention mechanism according to the first target audio signal and the second target audio signal; and executing a vehicle control instruction according to the audio signal corresponding to the target sound source area. According to the method, wake-up word detection and interference elimination are cooperatively performed on multiple paths of audio signals inside and outside the vehicle, and the target sound source area is accurately positioned in combination with a cross attention mechanism, so that the anti-interference performance of wake-up word detection and the accuracy of sound source positioning in a complex vehicle-mounted acoustic environment are improved, and the vehicle is ensured to only respond to a wake-up instruction of the target sound source area.

The invention relates to the cross technical field of wireless communication and intelligent agriculture, in particular to a NOMA-SIC uplink weighting and rate maximization method based on an unmanned aerial vehicle (RIS), and the method comprises the steps: constructing an uplink system composed of a fusion center, an unmanned aerial vehicle reconfigurable intelligent surface and a sensor node, and enabling the fusion center to employ a continuous interference elimination technology, and realizing multi-user concurrent transmission based on power domain multiplexing of non-orthogonal multiple access. According to the method, fractional programming, quadratic transformation and successive convex approximation technologies are jointly used, phase configuration of the RIS and sensor transmitting power are alternately optimized, beam forming vectors are received by a fusion center, and under the condition that the power, phase and service quality constraint conditions are met, the system weighting sum rate is maximized. The advantages of NOMA spectrum multiplexing and SIC interference elimination are brought into full play, the transmission reliability and the spectrum efficiency are remarkably improved, and the method is suitable for low-delay and high-reliability acquisition of intelligent agricultural large-scale sensor data and can be expanded to the scenes of industrial Internet of Things, emergency communication and the like.

Methods, systems, and devices for reducing the impact of a jamming signal on wireless communications are described. Generally, the described techniques provide for receiving a first signal at a first antenna and receiving a second signal at a second antenna. An anti-jammer manager may process the first signal and the second signal to obtain a residual signal. The processing may include determining a weighting factor based at least in part on a correlation between the first signal and the second signal, applying the weighting factor to the first signal to create a weighted first signal, and subtracting the weighted first signal from the second signal to obtain the residual signal. A demodulator may demodulate the residual signal to obtain symbol information. A decoder may decode the symbol information to obtain data. The techniques may be used to recover a desired signal portion from a jammed signal.

The application provides an audio processing method and device, a vehicle machine and a medium, and relates to the technical field of vehicle-mounted audio. The method comprises the following steps: performing wake-up word detection on at least two audio signals; the at least two audio signals comprise an out-of-vehicle audio signal and an in-vehicle audio signal; when the wake-up word is detected, performing interference cancellation on the audio signals to obtain a first target audio signal of the out-of-vehicle audio signal and a second target audio signal of the in-vehicle audio signal; determining a target sound source area by using a cross-attention mechanism according to the first target audio signal and the second target audio signal; and executing a vehicle control instruction according to the audio signal corresponding to the target sound source area. The application cooperatively performs wake-up word detection and interference cancellation on multiple audio signals inside and outside the vehicle, accurately locates the target sound source area by using the cross-attention mechanism, improves the anti-interference performance of wake-up word detection and the accuracy of sound source positioning in a complex vehicle-mounted acoustic environment, and ensures that the vehicle only responds to the wake-up instruction of the target sound source area.

An apparatus for canceling clock-to-signal interference in a multi-lane SerDes comprising an analog front-end circuit receiving an input signal from a signal path mixed with interference from a clock path. The apparatus includes a phase interpolator circuit implemented in the clock path to generate multiple phases of a clock signal and to provide a timing rotated by the phases for a track-and-hold circuit to sample the input signal and the interference in every cycle. The apparatus also includes an analog-to-digital converter configured to digitize the input signal and the interference to provide an ADC output and a digital-interference-cancellation circuit configured to demultiplex the ADC output and detect a baseline offset associated with the interference sampled at one of the phases in each demultiplexed path using a digital loop to calibrate the baseline offset.

An interference cancellation circuit, an operation method of the interference cancellation circuit, and a wireless communication apparatus are provided. The interference cancellation circuit may include a kernel generation circuit configured to: generate an interference model based on a transmit signal; an adaptive filter configured to: estimate coefficients of an interference model based on an adaptive algorithm to generate an interference estimation signal, and filter the interference estimation signal from the received signal to generate an interference cancellation signal; and a parameter control (PC) circuit configured to generate a control signal for controlling at least one parameter of the adaptive algorithm based on transmission signal information of the transmission signal, and transmit the control signal to the adaptive filter.

The application discloses a multi-channel self-interference cancellation device combined with an optical domain and a digital domain, which comprises a signal branch module a, a reference branch module b and a signal post-processing module c. The signal branch module a comprises n signal processing channels with the same structure, a wavelength division multiplexer (3), a dispersion medium (4), a wavelength division demultiplexer (5) and a multi-wavelength light source (8); each signal processing channel comprises a low-noise amplifier (1), a double-parallel Mach-Zehnder modulator (2), an optical power amplifier (6) and an optical-electricity detector (7) which are all the same. The reference branch module b comprises a low-noise amplifier (1), a double-parallel Mach-Zehnder modulator (2), a tunable laser (12), an optical splitter (9) and a multi-channel analog matching detection branch. The signal post-processing module c comprises an electric coupler (13), an analog-digital converter (14) and a digital signal processing (15). The application also discloses a multi-channel self-interference cancellation method combined with an optical domain and a digital domain. The application realizes self-interference cancellation of an array multi-channel in-band full-duplex system and beam forming of multi-channel useful signals with small array element scale and low operation cost.

A multiple interference cancellation circuit includes a first kernel generation circuit that receives transmission signals and, based on the transmission signals, generates a first interference model signal, a second kernel generation circuit that receives the transmission signals and, based on the plurality of transmission signals, generates a second interference model signal different from the first interference model signal, a first adaptive filter that receives the first interference model signal and, based on the first interference model signal and a first filter coefficient, generates a first interference estimation signal, a second adaptive filter that receives the second interference model signal and, based on the second interference model signal and a second filter coefficient, generates a second interference estimation signal, and a first summer that outputs a filtering signal obtained by subtracting the first interference estimation signal and the second interference estimation signal from a reception signal.

A system and method for self-interference cancellation using a full duplex adaptive array includes at least four ports within the network array, with at least two transmission elements at a first port and a second port, and at least one receiving element at a third port and a fourth port. A signal is transmitted along a first network path from the two transmission elements of the first port to the receiving element of the fourth port. The signal is transmitted along a second network path from the two transmission elements of the first port to the receiving element of the third port. A weight is applied to at least one of the two transmission elements of the first port, which modifies the signal transmitted along the second network path to cancel signal interference caused by the signal at the third port during full duplex operation of the network array.

The present disclosure relates to interference cancellation in dynamic spectrum sharing. The present application relates to apparatuses and components, including devices and means for canceling reference signal interference in a dynamic spectrum sharing network, systems, and methods.

The application provides a communication method and a base station, and belongs to the technical field of wireless communication, and the method comprises the following steps: performing at least one of the following according to resources and / or parameters associated with downlink scheduling of a second base station in a cross-interference time slot: uplink scheduling in the cross-interference time slot; uplink demodulation in the cross-interference time slot; and configuring an uplink demodulation reference signal. The application provides an interference cancellation method without a channel calibration process between a disturbing base station and a disturbed base station in a full-duplex system or other systems with cross-interference time slots, and the interference cancellation method also does not require the disturbing base station to exchange downlink data of the disturbing base station in the cross-interference time slot with the disturbed base station.

The system includes D MISO filters and D interference cancellation filters, and multiple received signal sequences are D first received signal sequences. Each of i-th (i is an integer between 1 and D) MISO filters included in the D MISO filters receives i-th D received signal sequence as input and estimates i-th single transmitted signal sequence included in D transmitted signal sequences. Each of i-th interference cancellation filters included in the D interference cancellation filters receives a signal obtained by transforming i-th single estimated transmitted signal sequence, which is the estimation result of i-th single transmitted signal sequence, through phase correction processing and noise compensation processing, and the i-th D received signal sequence. The system cancels interference signals included in the i-th D received signal sequence, outputs the i+1-th D received signal sequence, and estimates D transmitted signal sequences including the i-th single transmitted signal sequence.

An interference cancellation circuit may include a kernel generation circuit configured to generate an interference model based on a transmission signal, an adaptive filter configured to estimate coefficients for the interference model based on an adaptive algorithm to generate an interference estimation signal, and filter out the interference estimation signal from a received signal to generate an interference cancellation signal, and a parameter control (PC) circuit configured to generate a control signal for controlling at least one parameter of the adaptive algorithm based on transmission signal information of the transmission signal and transmit the control signal to the adaptive filter.

The present application relates to a position sensing method and apparatus, a computer device, a readable storage medium, and a program product. The method is applied to a receiver. The method comprises: processing a received reception signal to obtain a direct link signal corresponding to a signal source; on the basis of a serial interference cancellation policy and the direct link signal, determining a reflected link signal from the reception signal; performing sensing parameter estimation on the reflected link signal to obtain position sensing data; and determining coordinate information of a target device on the basis of the position sensing data. The present method can improve the accuracy of position sensing of reflection and scattering devices.

This invention provides a method, apparatus, base station, and communication system for interference cancellation in private network communication. Based on this interference cancellation method, after the target base station enters the working state, it receives uplink data sent by terminals in the same cell. During the demodulation of the uplink data, an interference cancellation matrix is ​​multiplied by the uplink data to obtain the interference-free uplink data. This interference cancellation matrix is ​​calculated using any idle resource block to evaluate the interference signals from adjacent base stations. In this embodiment, the target base station calculates the interference cancellation matrix of adjacent base stations using idle resource blocks, and then uses the interference cancellation matrix to cancel the interference signals, achieving the goal of quickly and effectively suppressing co-channel interference from adjacent base stations. This further improves the uplink data demodulation capability of the target base station.

The present disclosure relates to methods and devices, including apparatuses, such as UEs and / or base stations, for wireless communication. In one aspect, the apparatus can transmit an interference indication associated with a DSS, the interference indication corresponding to a capability of CRS interference cancellation. The apparatus can also receive CRS assistance information associated with the DSS, the CRS assistance information corresponding to one or more interfering cells. Additionally, the apparatus can determine at least one of a location or a sequence of at least one CRS, the at least one CRS corresponding to at least one of the one or more interfering cells. The apparatus can also mitigate interference from the at least one CRS corresponding to the at least one interfering cell, the interference mitigated based on the at least one of the location or the sequence of the at least one CRS.

The utility model discloses a Bluetooth debugging handle. The Bluetooth debugging handle comprises a first connecting part, a second connecting part and a cable, a connecting terminal, a power management module, a data conversion module, a Bluetooth transceiving module and an interference elimination module are also arranged in the second connecting part; the connecting terminal is connected with the input end of the power management module, the data conversion module and the interference elimination module respectively, and is connected with the first connecting part through a cable; the output end of the power management module is connected with the data conversion module and the Bluetooth transceiver module. Firstly, the first connecting part is inserted into the sun-tracking controller to achieve electric connection, then a fourth chip of the Bluetooth receiving and transmitting module communicates with the sun-tracking controller through the data conversion module, and then the Bluetooth receiving and transmitting module communicates with a handheld device of a worker through wireless Bluetooth. And a wireless communication bridge is established for the sun-tracking controller and the handheld device. The method is simple to operate, various in supported equipment, controllable in debugging distance and free of physical length limitation.

An interference cancellation circuit and an operation method of the interference cancellation circuit are provided. The multiple interference cancellation circuit includes: a first kernel generation circuit that receives a plurality of transmission signals and generates a first interference model signal based on the plurality of transmission signals; a second core generation circuit receiving the plurality of transmission signals and generating a second interference model signal different from the first interference model signal based on the plurality of transmission signals; a first adaptive filter receiving the first interference model signal and generating a first interference estimation signal based on the first interference model signal and the first filter coefficient; a second adaptive filter receiving a second interference model signal and generating a second interference estimation signal based on the second interference model signal and a second filter coefficient; and a first adder outputting a filtered signal obtained by subtracting the first interference estimation signal and the second interference estimation signal from the received signal.

The invention discloses a serial interference cancellation sequence configuration method and device based on probability iterative optimization, and relates to the technical field of wireless communication, and the method comprises the following steps: initializing a device set and algorithm parameters; discretizing decoding positions in the same frequency spectrum through binary coding, and compressing search dimensions; generating a candidate SIC sequence sample set based on the adaptive probability distribution; performing mapping and conflict processing on the samples, and screening feasible samples; evaluating the performance of a feasible sample by using a complex system model, and mapping the performance into a single evaluation scalar; screening elite samples and iteratively updating probability distribution; and judging probability distribution convergence, and outputting an optimal SIC sequence. Through a probability-driven sample generation and conflict processing mechanism, the method does not depend on an explicit mathematical model, can adapt to a complex system model, remarkably reduces the calculation complexity, meets the parallel optimization requirements in a multi-device and multi-spectrum-cluster scene, and further reduces the calculation complexity.

The invention relates to a satellite-borne receiving device and a signal receiving method for resisting malicious interference of an LEO satellite uplink. The satellite-borne receiving device comprises a beam forming network which is used for generating an LEO satellite beam pointing to a target area, receiving an uplink signal sent by a user, reducing the dimension of the uplink signal into an N-dimensional link receiving signal and outputting the N-dimensional link receiving signal; and the square phase shifter network is used for performing interference elimination on the received signals of the links, generating processing signals of the corresponding links and outputting the processing signals to the digital processing unit for signal estimation, and the processing signals output by each link are aggregation of the received signals of all the links after phase shifting. According to the invention, the analog front end with a two-stage structure is designed, so that the function decoupling of beam forming and interference elimination is realized, the interference is completely eliminated at the analog front end, and the algorithm complexity is reduced at the same time.

An electronic device may include wireless circuitry with a baseband processor, a digital transmitter, a digital-to-analog-converter (DAC), and an antenna. The baseband processor may produce baseband signals. The digital transmitter may generate self-interference-compensated signals based on the baseband signals. The DAC may generate radio-frequency signals for transmission by the antenna based on the self-interference-compensated signals and square-wave local oscillator waveforms. The digital transmitter may include a self-interference canceller that generates the self-interference-compensated signals. The self-interference-compensated signals may mitigate the creation of self-interferer repetition replicas that land on the carrier frequency of the radio-frequency signals. This may allow the radio-frequency signals to be free from error vector magnitude degradation and spectral regrowth that would otherwise be produced due to self-interference in the radio-frequency signals output by the DAC.

The application relates to a UAV array dynamic angle of arrival estimation method and system, which comprises the following steps: S1, acquiring array snapshot data after reference channel auxiliary synchronization and waveform compensation; S2, establishing a parameterized space-time coupling phase model in a short coherence processing interval; S3, based on the array snapshot data, obtaining a single-channel input sequence through beam forming, and estimating a radial parameter pair by using time domain atom matching filtering; S4, based on the radial parameter pair, performing common time phase compensation on the array snapshot data to obtain a compensated snapshot matrix; S5, performing two-dimensional correlation calculation by using a space-time steering atom to estimate an angle parameter pair; S6, constructing a complete space-time dictionary atom, and estimating a complex amplitude by using a least square criterion; and S7, performing successive interference cancellation to update a residual error. Compared with the prior art, the application has the advantages of keeping low signal-to-noise ratio coherence gain and significantly reducing calculation complexity.