462 results about "Interference cancelation" patented technology

The invention relates to a satellite-to-ground network adaptive image semantic communication method based on an NOMA technology, and the method comprises the following steps: S1, building a satellite-to-ground semantic communication frame integrated with the NOMA technology: carrying out the power superposition and serial interference elimination of different user transmission contents through the NOMA technology, a coding and decoding process is optimized through deep joint source channel coding based on hierarchical vision using a shift window; s2, establishing an adaptive semantic communication model: dynamically adjusting coding parameters based on a target bandwidth ratio and a signal-to-noise ratio of a satellite-ground channel; s3, proposing a dynamic weight adjustment algorithm: optimizing model convergence speed and transmission performance tradeoff under different channel conditions; and S4, designing a feature selection module: performing priority ranking on the image features, and selectively transmitting important features according to bandwidth resources. According to the method, the adaptive semantic communication model (ASeC-NOMA) which can be dynamically adjusted according to the target bandwidth ratio and the signal-to-noise ratio is constructed, and a large number of model storage parameters are saved while the transmission performance is ensured.

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.

Certain disclosed embodiments pertain to suppressing interference in a wireless communication system. For example, a method of suppressing interference can include receiving one, two, or more first signals including components from a plurality of sub-channels. Each of the first signals can be processed by a Finite Impulse Response filter adapted using an LMS update algorithm,

The invention relates to the technical field of instruments and meters, in particular to an inductively coupled plasma mass spectrometer system for intelligent data processing and report generation. Comprising a sample introduction unit, a plasma excitation and ionization unit, a mass analyzer and detection unit, a vacuum system unit and an intelligent data processing and report generation unit. Efficient ionization is achieved through a bipolar radio frequency switching and AI optimized reaction gas plasma source, the AI optimization module monitors in real time and dynamically adjusts parameters so that the ionization efficiency can be stabilized at 92% + / -2%, and meanwhile a reaction gas control system can optimize plasma conditions to suppress interference ions. And the mass analyzer and the detection unit realize high-precision ion separation by utilizing AI interference correction and a QMS-TOF double analyzer mode, and an interference elimination module can automatically eliminate polyatomic ion interference, so that the ionization efficiency, the analysis precision and the accuracy are improved, the interference is effectively inhibited, and the analysis capability of the system on a complex sample is enhanced.

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 embodiment of the invention provides a Beidou water vapor inversion method and system based on a buoy platform. The method is applied to the technical field of data processing, and comprises the following steps: receiving a Beidou dual-frequency signal through a direct antenna to obtain original observation data; the multi-path effect and the platform shake are inhibited by combining buoy motion characteristics obtained by the MEMS sensor to obtain pre-processed data; calculating a troposphere delay estimated value; establishing a delay-water vapor conversion model; suppressing short message interference to obtain effective observation data; and inputting the data into a model to calculate the amount of precipitable water and the relative humidity. According to the method, the key technical problems of sea surface multi-path effect suppression, platform shake compensation, marine atmosphere modeling, short message interference elimination and the like are solved, so that reliable water vapor parameter inversion on the buoy platform is realized.

The invention relates to the technical field of wireless communication, in particular to a super-Nyquist signal iterative interference elimination method based on symbol grouping and FEC (Forward Error Correction), which comprises the following steps of: acquiring bit streams, grouping symbols according to odd-even positions and encoding, and respectively generating and superposing odd-even sub-signals to generate FTN (Feeder Transfer Network) signals; performing matched filtering and sequence detection, and extracting soft information of odd and even positions; performing soft decoding on the soft information at the odd positions to generate Nyquist odd group signals; subtracting the odd-numbered group signals from the total signal of the receiving end to obtain even-numbered group feedback signals; performing matched filtering and soft decoding to obtain an even number position judgment bit, and regenerating an even number signal; and extracting an odd feedback signal by subtracting the total signal of the receiving end from the even regeneration signal, generating an odd decision based on Nyquist matched filtering and soft decoding, and performing loop iteration until ISI is completely eliminated. According to the invention, efficient and robust suppression of ISI in the FTN system can be realized, and the method can adapt to the dynamic change of an optical fiber channel.

The invention discloses a communication system signal receiving method, circuit, device and equipment based on a memristor, and belongs to the field of integrated circuits and the field of communication signal processing. According to the communication system signal receiving method provided by the invention, element values of a real number field channel matrix and a variance value of a noise signal vector are mapped into a conductivity value of a memristor, a real number field receiving signal vector is mapped into a voltage signal vector, the voltage signal vector is input into an analog domain calculation circuit, the output of the circuit is measured, and detection of all emission signal components is realized. The communication system signal receiving circuit, device and equipment are realized based on the method. Compared with a traditional processor based on digital domain calculation, the analog domain calculation circuit based on the memristor, which is realized by aiming at a serial interference elimination detection algorithm, is shorter in calculation delay and higher in energy efficiency, and compared with an existing linear detection algorithm circuit based on the memristor, the analog domain calculation circuit based on the memristor has the advantages of better detection performance and lower bit error rate.

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.

Aspects of this disclosure relate to a cancelling interference at an output of a power amplifier. An interference sensing circuit in a signal path between the power amplifier and an antenna can generate an interfering power signal. An interference cancellation loop can receive the interfering power signal and provide a cancellation signal to a transmit signal path that includes the power amplifier to thereby suppress interference at the output of the power amplifier. In certain embodiments, the interference cancellation loop includes an amplifier and a phase shifter. Related systems and methods are disclosed.

The invention discloses an equipment distance measurement method, electronic equipment, a storage medium and a product, and relates to the technical field of equipment distance measurement, the disclosed equipment distance measurement method comprises the following steps: sending an ultrasonic signal to slave equipment, and receiving a response signal replied by the slave equipment; performing interference elimination processing on the response signal to obtain a pure response signal; and determining the arrival time of the signal direct path from the pure response signal, and determining the distance between the master device and the slave device according to the arrival time. According to the invention, the distance measurement precision in a multi-device distance measurement scene can be improved.

The invention discloses an optical up-conversion, optical fiber transmission and self-interference elimination integrated device and method. The invention discloses an optical up-conversion, optical fiber transmission and self-interference elimination integrated device which comprises a central station, a transmission medium and a far-end base station. Wherein the central station comprises a first wavelength tunable laser (1), a local oscillator signal generator (2), a second wavelength tunable laser (3), a first double-parallel Mach-Zehnder modulator (4), an electric power divider (5), a second double-parallel Mach-Zehnder modulator (6), a 90-degree polarization rotator (7) and a polarization beam combiner (8). And a transmission medium adopts a single-mode optical fiber (9). The far-end base station comprises an optical power amplifier (10), a polarization beam splitter (11), a first photoelectric detector (12), a second photoelectric detector (13), an electric power amplifier (14), a transmitting antenna (15) and a receiving antenna (16). The invention further provides an optical up-conversion, optical fiber transmission and self-interference elimination method. According to the invention, the influence of the up-conversion transmission signal on the signal received by the far-end base station can be eliminated, the transmission quality of the received signal is improved, and the base station is simplified.

The invention relates to a transmission rate optimization method, device and equipment for a passive copper cable, and the method comprises the steps: obtaining physical characteristic parameters of the passive copper cable, and carrying out the performance evaluation, and obtaining reference transmission parameters; acquiring a transmission signal of the passive copper cable, and performing modulation optimization on the transmission signal and the reference transmission parameter to obtain an optimized transmission signal; obtaining interference characteristic data of the passive copper cable, and performing interference analysis on the optimized transmission signal to obtain an interference elimination result; performing rate evaluation analysis on the optimized transmission signal and the interference elimination result to obtain an initial rate parameter; performing trend analysis on the attenuation characteristic information based on the interference elimination result to obtain a rate attenuation prediction result; and performing rate optimization on the transmission signal according to the initial rate parameter and the rate attenuation prediction result to obtain a global optimization signal. According to the invention, various interferences in the transmission process can be effectively identified and eliminated.

Methods, systems, and devices for wireless communications are described. A network entity may transmit one or more control messages including scheduling information for a sidelink transmission and active interference cancellation (AIC) parameters to a transmitting user equipment (UE), a receiving UE, or both. The transmitting UE may relay the AIC parameters to the receiving UE. The transmitting UE may perform the sidelink transmission to a receiving UE. The transmitting UE may perform sidelink AIC on the sidelink transmission according to the AIC parameters. The receiving UE may decode the sidelink transmission by modifying interference at a receiver of the UE.

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.

Apparatus and methods for self-jamming cancellation in full duplex radios are disclosed herein. In certain embodiments, an RF front-end system includes a main power amplifier that amplifies an RF transmit signal from a main transmitter of a transceiver and a canceller power amplifier that amplifies an RF cancellation signal from a canceller transmitter of the transceiver. The RF front-end system operates to split the amplified RF cancellation signal into two or more cancellation signals including a first cancellation signal that is combined with an RF receive signal and a second cancellation signal that is combined with a sensed transmit signal from an output of the main power amplifier. The RF receive signal and the first cancellation signal are combined and provided to a main receiver of the transceiver, while the sensed transmit signal and the second cancellation signal are combined and provided to a canceller receiver of the transceiver.

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 invention relates to a dual dynamic optimization multi-user detection method based on SCMA in an uplink NOMA system, and belongs to the technical field of wireless communication. According to the method, the technical problems of insufficient multi-user interference suppression caused by codebook cross correlation enhancement in a high overload scene, poor convergence stability of a traditional detection algorithm and error code propagation caused by a hard decision mechanism are solved. The scheme of the invention comprises the following steps of: generating a dynamic codebook: constructing a low-mutual-interference codebook through resource load balancing and complex field amplitude phase joint optimization; dual confidence interference elimination: fusing user-level weight and symbol-level weight to dynamically adjust elimination intensity; according to the cross-layer iteration mechanism, soft information closed-loop feedback is achieved in combination with interference suppression merging equalization and hierarchical decoding; and dynamic damping updating: adaptively adjusting the soft information feedback intensity based on the signal-to-noise ratio to suppress oscillation. The method has the beneficial effects that the multi-user interference suppression capability is improved in a breakthrough manner, the interference elimination precision is revolutionarily optimized, and the system keeps ultrahigh reliability in a severe environment with a low signal-to-noise ratio.

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.

The invention discloses an interference elimination device for a router antenna, which relates to the technical field of routers and comprises a clamp mechanism. According to the interference elimination device for the router antenna, through the design of a clamp mechanism, in the process that a clamping plate clamps the surface of a router, a supporting rod extrudes a third spring on the inner side of a clamp shell, so that the damping and buffering effects are achieved, the clamping pressure of parts is reduced, damage to objects is avoided, and therefore the service life of the parts is prolonged; secondly, the supporting rods are contracted according to the appearance of the router, so that the supporting rods can be conveniently attached to the surface of the object, the clamping and attaching effect is improved, a certain anti-skid effect is achieved, the circular plates are made of silicone grease materials, heat conduction is enhanced, the overall heat dissipation efficiency is improved, the heat dissipation effect of equipment is kept, and the service life of the equipment is prolonged. Meanwhile, the contact area of the circular plate is small, space is reserved in the router clamping process, and the heat dissipation effect of equipment is prevented from being affected.

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.

RF communication systems with interference cancellation for coexistence are provided herein. In certain embodiments, a method of interference cancellation includes filtering a radio frequency (RF) transmit signal to generate a first RF feedback signal using a first filter of a front end system, filtering the RF transmit signal to generate a second RF feedback signal using a second filter of the front end system, processing the first RF feedback signal to generate a first digital interference cancellation signal using a first feedback receiver, processing the second RF feedback signal to generate a second digital interference cancellation signal using a second feedback receiver, and compensating an RF receive signal for interference based on the first digital interference cancellation signal and the second digital interference cancellation signal using a receiver.

The invention provides a communication method, a communication device, a transmitter and a storage medium. The method is applied to a transmitter, the transmitter comprises a transmitting antenna and a receiving antenna, and the method comprises the following steps: determining a target value range of an independent variable of a first function, the first function being used for indicating power of a self-interference signal between the transmitting antenna and the receiving antenna, the independent variable of the first function is used for indicating the polarization state of the transmitting antenna, and the first function is a convex function in the target value range; determining a target value of an independent variable of the first function from the target value range, so that the value of the first function meets a preset condition; and controlling the transmitting antenna to perform signal transmission according to the target value of the independent variable. By using the method, the polarization state of the transmitting antenna can be determined according to the preset condition, so that the self-interference is eliminated according to the self-interference elimination requirement, and the implementation is simple.

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.