571 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 relates to the technical field of neural networks and machine learning, in particular to a lithium ore multi-component content prediction and detection optimization system based on machine learning. The system comprises a multispectral data fusion and preprocessing part, a correction and interference elimination part and a machine learning model prediction part. The multispectral data fusion and preprocessing part is used for performing fusion and normalization processing on the first light intensity signal and the second light intensity signal to obtain a fusion signal; the correction and interference elimination part is used for performing spectral line overlapping interference elimination processing on the fusion signal to obtain an interference elimination signal, and performing matrix effect correction on the interference elimination signal to obtain a correction signal; the machine learning model prediction part is used for performing feature extraction on the correction signal by using a preset machine learning model to obtain features; based on the feature response function, an initial content of each element is predicted. According to the invention, high-precision and intelligent detection of multiple components of the lithium ore is realized.

The invention discloses a positioning method and system combining mobile relay and backscatter communication, and the method comprises the steps: enabling a mobile relay bidirectional wireless charging source in a mobile high-power radio frequency network to be located on the same straight line with two passive sensor nodes in the high-power radio frequency network, solving a receiving signal of the mobile relay bidirectional wireless charging source; according to the positions of the two passive sensors and the mobile relay two-way wireless charging source, the coordinates of the high-power radio frequency charging source are solved through dimensionality reduction and serve as a positioning point, and the coordinates of a to-be-positioned target are solved based on the positioning point; interference elimination is carried out on a received signal of a mobile relay bidirectional wireless charging source in backscatter communication under the high-power radio frequency network; and a high-power radio frequency charging source is used as a sensing positioning node. According to the invention, the communication quality of backscattering under a high-power radio frequency network can be improved, the positioning of the power supply can be quickly realized, and the sensor coverage range of the mobile relay two-way wireless charging power supply is expanded.

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 a multi-dimensional constellation diagram mapping enhanced orthogonal chirp multiplexing optical transmission sending method, receiving method and system in the field of optical communication. The method comprises the following steps: a sending end converts data to be transmitted into an original signal bit stream; mapping through a preset four-dimensional constellation diagram model to generate a four-dimensional constellation point coordinate sequence, and dividing the four-dimensional constellation point coordinate sequence into two different branches; respectively carrying out OCDM modulation on the four-dimensional constellation point coordinate sequences on the two branches to generate two time domain sending signal sequences; performing power distribution and superposition on the time domain sending signal sequence to form a final sending signal; and a receiving end receives the sending signal from the channel, performs OCDM demodulation on the sending signal, recovers constellation point signals in the two branches by using a serial interference cancellation technology, and obtains an original signal bit stream through demapping of the four-dimensional constellation diagram model. According to the invention, the problems of selective fading of signal frequency and overlong CP in DD-OFDM can be solved.

The present invention relates to the technical field of wireless communications, and particularly relates to an intelligent reflecting surface (IRS)-assisted non-orthogonal multiple access (NOMA) network transmission method based on hardware damage. The method comprises: building an IRS-assisted NOMA network system; building a base station transmission power minimization model on the basis of a user quality of service constraint, a successive interference cancellation constraint and a reflection phase shift constraint; solving the base station transmission power minimization model to obtain an optimal transmission solution; and the system performing transmission on the basis of the optimal transmission solution. An optimal transmission power result for multiple users under the NOMA technology and with the assistance of the IRS can be reflected, enhancing the robustness of the system.

The invention discloses an interference elimination method for a same-time and same-frequency time synchronization system, which is suitable for a microwave time synchronization networking system and is characterized in that radio frequency domain self-interference cancellation is carried out before a signal received by a receiving end of a time synchronization networking node from an antenna enters a low noise amplifier; the introduced offset signal is obtained by coupling a part of a transmitting signal before the transmitting end enters an antenna from the transmitting end of the node, and correcting amplitude, time delay and phase through radio frequency reconstruction. The invention further discloses a same-time and same-frequency time synchronization system, the time synchronization networking node comprises a transmitting end, and a receiving end is connected to a receiving and transmitting antenna through a circulator; and a radio frequency self-interference suppression module is arranged between a first port of the circulator connected with the output of the transmitting end and a third port of the circulator connected with the input of the receiving end to sample a radio frequency signal output by the transmitting end and then realize radio frequency reconstruction, so as to generate an offset signal to be coupled to the input of the receiving end.

The invention relates to the technical field of wireless communication, in particular to a communication and rate optimization method and system of an ARIS-assisted ISAC-NOMA system. Channel fading gains from a user terminal to an ARIS node and from the ARIS node to a DFRC-BS node, a steering vector when a DFRC-BS node antenna array sends a sensing signal and a complex path loss coefficient of the sensing signal are obtained, the DFRC-BS node sends the sensing signal, the user terminal sends an uplink communication signal, and the DFRC-BS node receives a sensing target echo signal and a communication signal at the same time; a continuous interference elimination technology is adopted for the communication sensing mixed signals, and the communication sum rate and the sensing signal-to-noise ratio are calculated; and iteratively solving an optimization problem by using an alternating optimization algorithm to obtain the maximum communication and rate of the system. Compared with the traditional method, the method provided by the invention can realize higher communication rate and better sensing performance in different scenes, and has higher practical application value.

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 invention discloses an interference elimination method and device, a medium, a product and equipment. The method comprises the following steps: determining an average energy value of to-be-detected time domain data; determining module value cumulative distribution information corresponding to the time domain data; determining the number of interested sampling points in the time domain data based on the average energy value and the module value cumulative distribution information; performing interference detection on the time domain data based on the number of the interested sampling points; and carrying out interference elimination processing on the time domain data based on an interference detection result, thereby accurately eliminating the interference suffered by the equipment, and facilitating the equipment to carry out efficient and high-performance post-stage decisions, such as efficient and high-performance cell search, grid scanning and other processes.

A method for realizing rate-splitting multi-access in a mobile cell-free massive MIMO system includes the following steps: splitting, by an access point, the data of each user into two parts with common message and private message, coding all the common message into one super message common message stream, coding each piece of the private message into a private message stream; coding, by the access point, the private message stream using an arbitrary linear pre-coding method, coding the super common message stream using an optimal pre-coding method, and sending the final coded super common message streams to user terminals after superimposing the final coded super common message stream on the private message streams; first decoding, by the user terminals, the super common message stream, removing the super common message stream using successive interference cancellation technology, and then decoding the private message streams.

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 discloses a time-varying channel estimation method and device, a medium and a product, and relates to the technical field of underwater acoustic communication, and the method comprises the steps: carrying out the preprocessing of a received signal, and obtaining a baseband signal; the method comprises the following steps of: performing channel initialization estimation by using a preamble according to a baseband signal; constructing a joint transmission matrix model by using the correlation between the channels at adjacent moments according to the initialized estimated values of the channels; detecting symbols at adjacent moments according to the joint transmission matrix model; taking the symbol with the minimum detection error in the symbols at the adjacent moments as a new pilot frequency; performing interference elimination on the new pilot frequency by using the detected symbols; and using the new pilot frequency after interference elimination to carry out iterative verification on the current time channel obtained based on the FBMC-OQAM channel estimation method until the error converges, outputting the current time channel, and carrying out channel estimation at the next time. According to the invention, the symbol detection accuracy during long data block transmission can be improved.

The invention relates to a position sensing method and device, computer equipment, a readable storage medium and a program product. The method is applied to a receiver, and comprises the following steps: processing a received receiving signal to obtain a direct link signal corresponding to a signal source; determining a reflected link signal from the received signal based on a serial interference cancellation strategy and the direct link signal; performing sensing parameter estimation on the reflection link signal to obtain position sensing data; and determining coordinate information of the target device based on the position sensing data. By adopting the method, the position sensing accuracy of the reflection and scattering equipment can be improved.

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.

A line-of-sight (LOS) multiple-input multiple-output (MIMO) microwave radio link receiver configured for successive interference cancelation (SIC) operation,wherein the receiver includes a plurality of receiver input ports, where the receiver input ports are connected to a pre-detection network, configured to perform mutual MIMO interference cancellation for each receiver radio branch, and to output pre-detection signals for two or more symbol streams of the LOS-MIMO receiver,where the pre-detection signals are fed in a SIC sequence to respective information symbol detectors of the symbol streams, where the output of each information symbol detector in the SIC sequence is arranged to be phase shifted and added to pre-detection signals yet to be fed to its respective information symbol detector,where the output of the information symbol detectors of the symbol streams constitutes an output of the LOS MIMO microwave radio link receiver.

The invention relates to the technical field of wireless communication, and discloses a high-efficiency low-cost aliasing mirror image interference elimination device for a digital transmitter. The device comprises a baseband signal processing module, a digital up-conversion module, an aliasing mirror image interference elimination module, a digital-to-analog conversion module and a transmitting module, the aliasing mirror image interference elimination module adopts a time domain compensation method, and an interference signal is compensated at a mirror image frequency point of a baseband signal; the mirror image problem generated by IQ mismatch and aliasing interference generated by mutual modulation between the digital high-frequency signal and the LO are eliminated at the same time. The device can complete IQ signal compensation by only needing two multiplications and one additive operation, has the characteristics of low implementation complexity and low cost, and can effectively improve EVM and ACLR performance of a transmitted signal.