306 results about "Interference cancelation" patented technology

The invention provides a dual-unmanned aerial vehicle cooperative obstacle avoidance and communication link reconstruction system and method, and belongs to the technical field of wireless communication and unmanned aerial vehicle cooperative control. The system is composed of two unmanned aerial vehicles, serves as a mobile base station to provide relay communication for users, and cooperatively perceives an aerial target. The method comprises the following steps: establishing an integrated model integrating tracks, NOMA signals and layered continuous interference cancellation; calculating communication and sensing key indexes; constructing an optimization problem which takes maximization of the minimum average interaction rate between the unmanned aerial vehicles as a target and takes power, QoS, perception and security constraints into consideration; a distributed architecture is adopted to decompose problems, and a Dual-TD3 algorithm is proposed to collaboratively optimize beam forming and a flight path. According to the dual-unmanned aerial vehicle cooperative obstacle avoidance and communication link reconstruction system and method, dynamic intelligent distribution of communication and sensing resources is realized, and the interaction rate, the robustness and the resource utilization rate of the system in a dynamic scene are remarkably improved.

The invention discloses an AI-based cooperative communication method and system for dynamic spectrum allocation and interference elimination, and the method comprises the following steps: 1, collecting historical data of power equipment, including power line environment data collected by a sensor and power line data collected by a dual-mode communication module; 2, marking the historical data, and inputting the marked historical data into the AI model for training; 3, predicting communication performance through the trained AI model, and dynamically adjusting spectrum allocation according to a prediction result; and step 4, the AI model analyzes interference signal characteristics in a prediction result, and interference is eliminated for different interference types by adopting a matching algorithm. According to the invention, the AI technology is utilized to dynamically optimize the power and frequency spectrum selection of the HPLC and the HRF under the condition of meeting the upper limit of equipment energy consumption and the upper limit of transmission power of the dual-mode communication module, and the interference in a complex power line environment is eliminated, so that the optimal communication performance is ensured.

A method of tracking a peripheral device is disclosed. A synchronization request signal is emitted via an infrared (IR) emitter of a head-mounted device (HMD). A peripheral device is configured to activate an IR constellation of IR emitters as acknowledgement of receiving the synchronization request signal. An image frame is captured via a camera of the HMD. It is determined that the peripheral device is synchronized with the HMD based at least on recognizing the activated IR constellation in the image. A peripheral device tracking image frame capture sequence is initiated. The sequence includes a plurality of odd image frames and even image frames. The peripheral device is configured to activate the IR constellation in odd image frames and deactivate the IR constellation in even image frames. A sequence of composite image frames is generated by subtracting content in corresponding even image frames from content in corresponding odd image frames.

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 disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The disclosure provides a method performed by a user equipment (UE), the method comprises receiving, from a base station, data in a slot including a first signal transmission section and a second signal transmission section, identifying whether the received data includes a first data in the first signal transmission section for self-interference channel estimation of the base station, in case that the received data includes a first data in the first signal transmission section, decoding the first data using a first transmission scheme for the first signal transmission section, and in case that the data includes a second data in the second signal transmission section, decoding the second data using a second transmission scheme for the second signal transmission section.

An interference signal processing unit of a radar device is configured to: determine an interference range in a sample signal; generate a modified sample signal by multiplying the sample signal by a reduction signal; convert the modified sample signal into a first frequency domain sample signal in a frequency domain; convert the reduction signal into a subtraction template signal in a frequency domain; calculate an evaluation value based on the first frequency domain sample signal and the subtraction template signal so as to determine whether a partial signal of the first frequency domain sample signal is derived from a reflected wave from an object; and generate an interference-removed signal so that a time domain signal based on the partial signal determined as derived from the reflected wave based on the evaluation value is included in the corresponding range of the interference-removed signal.

The present invention relates to the field of communication and sensing, and specifically to a communication and sensing integrated device based on a seven-core optical fiber interferometer and an application method therefor. The application method comprises: a first beam splitter splitting, into reference light and signal light, a light source emitted by a narrow linewidth laser; performing modulation by means of a first coherent optical transmitter and a second coherent optical transmitter; amplifying the light by means of a first amplifier and a second amplifier, and then enabling the light to pass through a multi-core optical fiber from a fan-in end, and to output from a fan-out end; performing beam splitting by means of a second beam splitter and a third beam splitter, and performing demodulation by means of a first coherent receiver and a second coherent receiver; and finally, a phase-locked loop performing interference elimination on preliminarily-demodulated reference light and preliminarily-demodulated signal light to obtain finally-demodulated reference light and finally-demodulated signal light. The present invention uses a phase-locked loop to further eliminate disturbance noise of reference light and signal light. Therefore, noise interference is eliminated in continuous low-frequency detection, thereby improving the communication and sensing effect.

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.

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 present disclosure relates to a method for transmission in a hardware impairment-based intelligent reflecting surface (IRS)-assisted non-orthogonal multiple access (NOMA) network, including: constructing an NOMA network system assisted by an IRS; constructing a base station transmission power minimization model based on a user quality of service (QoS) constraint, a successive interference cancellation (SIC) constraint, and a reflective phase shift constraint; solving the base station transmission power minimization model to obtain an optimal transmission scheme, and controlling the NOMA network system to transmit according to the optimal transmission scheme; the base station transmission power minimization model including an active beamforming vector optimization sub-problem and a passive beamforming vector optimization sub-problem.

Techniques are disclosed for self-interference signal cancellation. A self-interference cancellation method includes measuring an error between an output of a hardware cancellation circuit and an output of a software model of the hardware cancellation circuit. The method further includes estimating an amplitude error, a phase error, and a delay error based on the measured error and the output of the hardware cancellation circuit, and locating a largest frequency domain error peak in the measured error. The method further includes applying an all-pass filter to the estimated and measured signals at the peak error frequency to produce a filtered estimated signal and a filtered measured signal and optimizing the filtered estimated signal and the filtered measured signal to obtain an optimized canceller setting. The optimized canceller setting is provided to the hardware cancellation circuit.

Radio frequency (RF) communication systems with interference cancellation for coexistence are provided herein. In certain embodiments, an RF communication system includes a transmitter including a power amplifier that amplifies an RF transmit signal, a receiver including a low noise amplifier (LNA) that amplifies an RF receive signal, and an interference cancellation circuit that selects a bandpass filter from a plurality of bandpass filters to filter the RF transmit signal after amplification by the power amplifier. The selected bandpass filter operates in combination with a controllable gain circuit and a controllable phase circuit to generate an analog interference cancellation signal that is injected into the receiver to compensate the RF receive signal for interference arising from the transmitter.

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 application discloses a self-interference cancellation device in a full duplex system, which is an independently deployable hardware module connected between a radio frequency transceiver and an antenna, and comprises a switch matrix and a phase shift network unit, a control signal unit, an interface unit and a power supply unit. The switch matrix and the phase shift network unit comprise a radio frequency switch matrix and an inverter composed of a balun transformer; the control signal unit comprises a microcontroller. The microcontroller is configured to output a periodic control signal to synchronously control the radio frequency switch matrix to alternately switch the connection between the two antennas and the transmitting and receiving ports in the first half cycle and the second half cycle in a control period, and synchronously control the phase shift network to introduce a 180-degree fixed phase shift in the second half cycle. Through the above operation, the self-interference signal spectrum is moved away from the baseband, and then low-pass filtering is performed on the latter stage to realize endogenous elimination. The application does not need channel estimation, has simple hardware architecture, low cost and good compatibility, and is convenient for full duplex upgrading of existing equipment.

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.

The utility model provides a voiceprint sensor circuit of a combined power fan blade, which belongs to the technical field of fan blades and comprises a first differential mode interference elimination module, a second differential mode interference elimination module, a first common mode interference elimination module and a third differential mode interference elimination module, the first differential mode interference elimination module is used for eliminating differential mode static electricity, electrical fast transient pulse train and differential mode surge interference of the direct current power supply, the second differential mode interference elimination module is used for eliminating differential mode static electricity interference, and the first common mode interference elimination module is used for eliminating common mode surge and electrical fast transient pulse train interference. And the third differential mode interference elimination module is used for eliminating differential mode surge and electrical fast transient burst interference. According to the scheme, the protection performance of the voiceprint sensor can be improved.

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 relates to the technical field of wireless communication, and especially relates to a communication and rate optimization method and system of an ARIS assisted ISAC-NOMA system. Channel fading gains of a user terminal to an ARIS node and the ARIS node to a DFRC-BS node, a steering vector when the DFRC-BS node antenna array transmits a sensing signal, and a complex path loss coefficient of the sensing signal are acquired, the DFRC-BS node transmits the sensing signal, the user terminal transmits an uplink communication signal, and the DFRC-BS node simultaneously receives a sensing target echo signal and a communication signal; a successive interference cancellation technology is used for a communication and sensing mixed signal, a communication and rate and a sensing signal-to-noise ratio are calculated, an iterative solution optimization problem is solved by using an alternating optimization algorithm, and the maximum communication and rate of the system is obtained. The method of the present application can achieve a higher communication rate and better sensing performance than traditional methods in different scenarios, and has high practical application value.

The present application provides a signal processing method, a communication node, a storage medium, and a program product. The method comprises: a first communication node receiving a reference information response message, the reference information response message comprising first reference information, and the first reference information being used for assisting the first communication node in performing interference cancellation during sensing signal processing (S110); after receiving the reference information response message, the first communication node determining the first reference information comprised in the reference information response message; and the first communication node performing interference cancellation on the basis of the first reference information during sensing signal processing, thereby improving sensing processing efficiency, reducing the influence of interference, improving sensing accuracy, and reducing sensing data reporting overhead.

The invention relates to an interference elimination method and device and computer equipment. The method comprises the following steps: receiving an initial time domain signal on a time-frequency resource of a serving cell; wherein the initial time domain signal is a superposed signal of a first physical broadcast channel (PBCH) signal from a serving cell and a second PBCH signal from a same-frequency interference cell of the serving cell; pBCH decoding is carried out on the initial time domain signal to obtain first cell information; wherein the first cell information comprises a target synchronization signal of the first cell and PBCH block SSB center frequency point information; determining the first cell as a same-frequency interference cell according to the cell center frequency point information and the target SSB center frequency point information, and performing same-frequency interference elimination on the initial time domain signal according to the cell center frequency point information; wherein the cell center frequency point information comprises the actual SSB center frequency point information of the service cell and the actual SSB center frequency point information of the same-frequency interference cell. The method can effectively eliminate the same frequency interference and improve the communication quality.

Various aspects of the present disclosure generally relate to wireless communication. Some aspects more specifically relate to inter-user-equipment (inter-UE) interference cancellation (IC) for physical downlink control channel (PDCCH) multi-user multiple-input multiple-output (MU-MIMO). In some aspects, a user equipment (UE) may be configured with an indication of cell radio network temporary identifiers (C-RNTIs) and / or scrambling code identities of respective candidate UEs that use the same or overlapping control-channel elements (CCEs) as the UE. In some aspects, the UE may perform the inter-UE IC by decoding a PDCCH communication targeted for one or more of the candidate UEs and subtracting the decoded PDCCH communication from at least a part of a PDCCH MU-MIMO communication such that the remaining signal includes data targeted for the UE.

Provided is an interference removal device (1) capable of inhibiting deterioration due to noise emphasis. The interference removal device comprises: a data symbol extraction unit (11) for outputting a data symbol signal (101); a null symbol extraction unit (12) for outputting a null symbol signal (102); a data symbol power calculation unit (14) for calculating a data symbol power calculation estimation value (104); a null symbol spectrum calculation unit (15) for calculating a null symbol spectrum (105); an interference center frequency estimation unit (16) for outputting an interference center frequency estimation value (106); an interference bandwidth estimation unit (17) for outputting an estimation interference bandwidth (107); and an interference removal unit (18) for generating an interference replica signal and multiplying the interference replica signal by a weight factor for each frequency in accordance with the ratio of a noise power component and an interference power component included in the interference replica signal to thereby inhibit deterioration due to noise emphasis.

The invention discloses a passive Internet of Things self-interference elimination method, device and equipment, a storage medium and a program product, which are applied to a label end. The method comprises the following steps: acquiring an original baseband signal of a passive tag; performing frequency modulation processing on the original baseband signal by using the pre-generated square wave signal to obtain a new baseband signal; controlling a radio frequency switch to switch between two predetermined total reflection impedance states based on the new baseband signal so as to perform backscattering on an excitation signal received by the passive tag to obtain a reflection signal; the reflected signal and the excitation signal are in different frequency bands. By adopting the method, the accuracy of the reflected signal received by the receiving end and the stability of a communication system can be improved.

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 application relates to a channel estimation method of an affine frequency division multiplexing waveform based on compressed sensing. The method comprises the following steps: establishing an affine frequency division multiplexing waveform model based on compressed sensing; according to the affine frequency division multiplexing waveform model based on compressed sensing, an initial channel vector is calculated by using a compressed sensing algorithm; the initial channel vector is taken as a first channel vector; pilot interference cancellation is performed on the first channel vector to obtain a second channel vector; data detection is performed on the second channel vector to obtain a first detection data vector; according to the first detection data vector and the affine frequency division multiplexing waveform model based on compressed sensing, a third channel vector is calculated by using the compressed sensing algorithm; the third channel vector is taken as a new first channel vector, and the operation is repeated until a preset condition is reached; and the third channel vector is taken as final channel estimation. The method has the characteristics of strong stability and high efficiency.

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 provides an RS-485 bus passive protection device for on-line monitoring equipment of a transformer substation. The RS-485 bus passive protection device comprises a primary protection module, a primary filtering module, a residual voltage release module and a residual interference elimination module which are sequentially connected in series along an RS-485 bus signal path, all the modules are matched in sequence to provide graded protection for the RS-485 bus, the primary protection module is used for discharging high-voltage impact current generated by lightning stroke and surge, the primary filtering module is used for attenuating pulse group interference signals in the bus, the residual voltage release module is used for carrying out secondary clamping on residual high voltage and slowly releasing residual charges, and the secondary filtering module is used for carrying out secondary filtering on the residual high voltage. And the residual interference elimination module is used for filtering residual interference signals so as to ensure normal communication. The problem that high-voltage pulses such as field surges and lightning strokes break down an RS485 interface of online monitoring equipment is solved, meanwhile, interference of interference signals such as pulse groups and conducted disturbance on a bus is effectively solved, and the equipment can safely and reliably work in a complex electromagnetic environment.

The invention relates to a low-earth-orbit satellite hopping beam random access method and a low-earth-orbit satellite hopping beam random access system. The method comprises the following steps: a ground relay sends an initialization parameter to each ground device in a coverage range in a broadcast mode; the ground relay receives an access frame sent by each ground device, and performs serial interference elimination and capture on a data packet of each access time slot in the access frame to obtain a conflict-free target data packet; the ground relay reports the to-be-uplink data volume corresponding to the conflict-free target data packet to a satellite through a control channel, so that the satellite performs beam hopping planning according to the to-be-uplink data volume; and the ground relay receives the hopping beam planning result sent by the satellite, and performs uplink transmission on the data packet of each ground device according to the hopping beam planning result. Therefore, multiple times of signaling interaction between the ground equipment and the satellite can be avoided, the transmitting power requirement of a user is reduced, the energy consumption is reduced, the service life of the ground equipment is prolonged, the interference between beams can be reduced, and the access capacity is greatly improved.