75results about "Transmission noise reduction" patented technology

The invention belongs to the technical field of communication, and discloses a communication method and system based on broadband interference suppression and target signal reconstruction, and the method comprises the steps: collecting an original broadband communication signal; carrying out compressed sampling on the preprocessed signal to obtain compressed data; performing time-frequency domain conversion on the compressed data, and performing sparse representation on the signal by using the sparse dictionary to obtain time-frequency domain conversion data; reconstructing an original broadband communication signal from the time-frequency domain conversion data by adopting an iterative reconstruction algorithm and combining an interference suppression strategy, and eliminating an interference component to obtain a target signal; and comparing the quality index of the reconstructed target signal with a preset performance index, and dynamically optimizing at least one key parameter of compressed sampling, sparse representation, iterative reconstruction or interference suppression according to a comparison result. According to the method, a complex and changeable interference environment can be adaptively dealt with, it is ensured that the system always keeps the optimal processing effect, and the robustness is far better than that of a traditional method adopting fixed parameters.

The invention discloses a distributed cooperative interference management method for a multi-task air federated learning system, and the method comprises the steps: firstly, obtaining channel information between each base station and associated edge equipment, and an interference temperature value between the base stations, so as to construct a communication parameter optimization model; secondly, calculating the optimal transmission power and the optimal noise reduction factor through interference temperature negotiation between paired base stations by adopting a distributed coordination mechanism; then, all base station pairs are traversed circularly, and collaborative optimization of power and noise reduction factors of the whole network is completed; and finally, the edge equipment executes air aggregation transmission of gradient signals based on the optimal transmission power, and the target base station completes signal processing and updates the cell model according to the optimal noise reduction factor of the target base station. According to the distributed cooperative interference management method, the cross-cell performance balance of a multi-task system can be remarkably improved, the communication and calculation burden can be effectively reduced, the network expansibility and stability are improved, and the distributed cooperative interference management method is more suitable for multi-task air federated learning in a large-scale network environment.

The application provides a multi-target unmanned aerial vehicle uplink tracking interference method based on a frequency hopping pattern; frequency hopping signals present periodic occurrence rules in each subchannel, and the periods are all frequency hopping sequence periods, so that tracking interference is completed on the periodic signals of each subchannel, and the whole tracking interference on the single unmanned aerial vehicle frequency hopping link is realized. Based on this feature, the application divides different subchannels and different tracking and interference threads in the same channel, converts the problem of tracking and interfering on multiple unmanned aerial vehicles into the problem of tracking and interfering on various periodic signals in different subchannels, can track the frequency hopping time of the frequency hopping signal under the condition of complex time-frequency domain distribution of the frequency hopping signal and unknown accurate frequency hopping period parameters, accurately interferes on the communication link of the multiple unmanned aerial vehicles, has short interference response time and high interference efficiency, and thus better completes the multi-unmanned aerial vehicle countermeasure task.

The invention relates to a signal noise suppression system based on an optical time domain reflectometer, and the system comprises a transmitting unit which is used for generating an optical time domain reflection pulse signal with preset parameters according to control information; the testing unit is connected with the transmitting unit and the optical fiber to be tested and is used for injecting the received pulse signal into the optical fiber to be tested and guiding the reflected echo optical signal into the receiving unit; the receiving unit is connected with the testing unit and is used for receiving the echo optical signal and converting the echo optical signal into a digital signal, so that the data processing unit can receive and process the digital signal conveniently; and the data processing unit is respectively connected with the receiving unit and the transmitting unit and is used for carrying out range dynamic filtering processing according to the data signal transmitted by the receiving unit, storing the filtered signal and transmitting control information to the transmitting unit, so that the transmitting unit generates a pulse signal with a preset parameter according to the signal. The technical problems of signal broadening deformation and time delay, slow system operation, increased test blind area and the like in the prior art are solved.

The present application belongs to the field of magnetic functional materials and components, and relates to high-frequency electromagnetic interference suppression technology, in particular to an integrated thin film noise suppressor. The present application divides the magnetic thin film into layers, integrates multiple layers of soft magnetic thin film on the transmission line through the isolation of the insulating layer, realizes the suppression of noise through the magnetic loss of the soft magnetic thin film, and can form an integrated thin film noise suppressor with single frequency point or multiple frequency points in the frequency range of 0-6GHz. The present application provides an optional scheme for further satisfying wideband electromagnetic noise suppression by adjusting the type or thickness of the magnetic film material according to actual needs. The present application has the advantages of simple structure and process, integrability, high performance, wide frequency band and high applicability.

Processing a signal originating from a node port experiencing ingress. A node that provides service to a plurality of cable modems will generally have a plurality of node ports. The node may be a Remote PHY Node or a Remote MACPHY node (RMN) for example. A detection is made that a particular node port of the node is experiencing ingress. In response, an upstream signal originating from the particular node port is analyzed to dynamically determine an amount to attenuate the upstream signal. The upstream signal is attenuated the dynamically determined amount prior to the signal being processed at an active device upstream from the particular node port experiencing the ingress. Distortion and / or saturation of the signal at the active device is advantageously prevented.

Method and apparatus for transferring a data signal including receiving a digital data signal by a first data input of a transmitter multiplexer; inverting the digital data signal by a first inverter,

A method for reducing noise using a neural-network-based adaptive line enhancer includes receiving an input signal including a narrowband signal and noise. The narrow signal and the noise are de-correlated via an artificial neural network. The artificial neural network generates an estimate of the narrowband signal. The noise in the input signal is reduced based on the estimated narrowband signal.

An electronic apparatus comprising an electronic board on which are placed an electronic subassembly and a filtering unit, the analog subassembly comprising one or more radiofrequency analog components for receiving radiofrequency components is proposed. The analog subassembly is protected by shielding placed on one side of the electronic board, the filtering unit is placed on the side of the electronic board on a signal path electrically connected to the analog subassembly, the filtering unit comprises a capacitive component placed under the shielding and connected to an analog ground, and the filtering unit further comprises a filtering component placed on the input to the filtering unit in series with the signal path on passing through the shielding or in the immediate vicinity of the shielding.

A signal isolation device comprises a transmitting chip having a pair of input terminals coupled to a pair of transmitter output terminals. A receiving chip includes a pair of receiver input terminals, a pair of output terminals, and a coupler region, the transmitting chip being attached to a top surface of the receiving chip. The coupler region includes a transmitting coil connected to the pair of transmitter output terminals, a receiving coil positioned proximate the transmitting coil and connected to the pair of output terminals, a receiving circuit, and a shielding layer positioned between the receiving circuit and the receiving coil.

The present invention provides a single sideband signal generator, comprising: a modulator configured to generate a first modulated optical signal and a second modulated optical signal having the same amplitude; and the sideband suppression light circuit based on the first light delay line is used for generating a full-carrier single-side-band signal, and / or the sideband suppression light circuit based on the second light delay line is used for generating a carrier-suppressed single-side-band signal. The present invention simplifies the structure by saving half the space occupied by redundant signal electrodes, and also reduces the RF power consumption by half by removing an RF mixer. The provided single side band (SSB) signal generator has the advantages of compact structure, low cost and energy conservation. By reasonably designing the length of the optical delay line, the generator can be easily expanded to a higher frequency range on the premise of not needing extra cost.

An electronic device may include wireless circuitry with a transmit antenna that transmits signals and a receive antenna that receives reflected signals. The wireless circuitry may detect a range between the device and an external object based on the transmitted signals and the reflected signals. When the range exceeds a first threshold, the wireless circuitry may use the transmitted signals and received signals to record background noise. When the range is less than a second threshold value, the wireless circuitry may detect the range based on the reflected signals and the recorded background noise. This may allow the range to be accurately measured within an ultra-short range domain even when the device is placed in different device cases, placed on different surfaces, etc.

An embodiment of the present application provides a precoding method, a communication device, and a storage medium, the method including: an access node obtaining preprocessed modulation symbols from a control node, where the preprocessed modulation symbols are obtained by preprocessing the modulation symbols with a preprocessing matrix; an access node precoding the preprocessed modulation symbols to obtain precoded modulation symbols; and an access node transmitting the precoded modulation symbols.

An apparatus and method to measure nonlinear system noises may include a processor to generate a bilateral notch signal, a unilateral notch signal and a multi-tone signal; to measure power of an additive Gaussian white noise of a nonlinear system by using the multi-tone signal; to measure a first power-to-noise ratio of the nonlinear system by using the bilateral notch signal; to measure a second power-to-noise ratio of the nonlinear system by using the unilateral notch signal. The processor is to calculate a nonlinear power-to-noise ratio of the nonlinear system and a power-to-noise ratio introduced by IQ imbalance according to the power of the additive Gaussian white noise, the first power-to-noise ratio and the second power-to-noise ratio.

This dryer comprises: a drum for accommodating an object to be dried; a hot air supply device for supplying hot air into the drum; a motor used to rotate the drum; a power supply device for supplying power to the motor; and at least one processor for controlling the motor. The power supply device comprises: a power terminal unit for receiving AC power including a ground wire through a first input terminal and a second input terminal; an EMI filter for removing noise included in the AC power; and a ground terminal including the ground wire connected to the power supply device. The EMI filter comprises: an X capacitor unit including a first capacitor; a first common mode filter including a first core, a first inductor wound around the first core, and a second inductor wound around the first core; a Y capacitor unit including a second capacitor and a third capacitor connected in series; and a second common mode filter including a second core, a third inductor wound around the second core, a fourth capacitor connected in parallel to the third inductor, a fourth inductor wound around the second core, and a fifth capacitor connected in parallel to the fourth inductor.

This invention provides a wireless walkie-talkie and its anti-crosstalk method. The method includes: locating the walkie-talkie's position using a positioning system; when the walkie-talkie configuration information set does not completely cover all walkie-talkie configuration information, filtering out walkie-talkie configuration information not included in the set to obtain a set of available walkie-talkie configuration information; and a server selecting walkie-talkie configuration information from the available information set and configuring it into the walkie-talkie via a wireless transmission module. This invention avoids crosstalk phenomena caused by identical walkie-talkie configurations with other walkie-talkies, prevents communication with other walkie-talkies, and improves the privacy of walkie-talkie conversations within the team. Simultaneously, configuring the walkie-talkie configuration information wirelessly avoids manual configuration by the user, reduces the difficulty of operating the walkie-talkie, saves operation time, and improves the user experience.

The application discloses an anti-interference method of a surface acoustic wave passive wireless sensing system based on artificial intelligence. Firstly, radio frequency signal intensity data of various surface acoustic wave echo signals including noise, normal response and interference under different frequencies are acquired, and different labels are given to the radio frequency signal intensity data. The radio frequency signal intensity data is sequentially preprocessed, standardized, one-hot encoded and an additional dimension is added, so that the data becomes three-dimensional. A one-dimensional CNN neural network classification model of a training attention mechanism is constructed. The model comprises a one-dimensional convolution layer used for extracting time-frequency features of the radio frequency signal intensity data, and the size of the convolution kernel is 1, the padding is 1 and the step is 1, and an attention mechanism module used for weighted average of the time-frequency features extracted by the one-dimensional convolution layer. The one-dimensional CNN neural network model after training is used to output the category of a new surface acoustic wave echo signal. When the anti-interference is realized, the time domain and frequency domain information of the echo signal can be reserved, the loss of information is reduced, and the signal reconstruction quality and reliability are improved.

Embodiments disclosed herein relate to reducing insertion loss in a transceiver while improving an operating efficiency of the transceiver. To do so, the transceiver may include isolation circuitry with harmonic distortion rejection circuitry, an electrostatic discharge filter, an out-of-band noise filter, and / or a matching network. In particular, the harmonic distortion rejection circuitry may enable a second harmonic signal to pass from a power amplifier of a transmitter of the transceiver to ground. The electrostatic discharge filter may also provide a path to ground for electrostatic discharge, and the out-of-band noise filter may provide a path to ground for noise signals. The isolation circuitry may substantially remove or decrease interference caused by undesirable signals while reducing a power consumption and thus improving an operating efficiency of the transceiver.

A method for reducing noise using a neural-network-based adaptive line enhancer includes receiving an input signal including a narrowband signal and noise. The narrow signal and the noise are de-correlated via an artificial neural network. The artificial neural network generates an estimate of the narrowband signal. The noise in the input signal is reduced based on the estimated narrowband signal.

The invention relates to the technical field of communication, and discloses a quantum enhanced inductance system for 6G and an interference suppression method, and the system comprises a double-channel heterogeneous radio frequency front end, a cooperative processing core, and a self-adaptive quantum state control loop. The double-channel heterogeneous radio frequency front end comprises a traditional broadband radio frequency link and a Rydberg atomic quantum enhanced radio frequency link which are parallel and used for synchronously receiving the same antenna signal. Through the non-saturation characteristic of the quantum link, the effective instantaneous dynamic range of the system can be improved by more than 20dB, so that reliable communication can be maintained in extreme scenes such as radar sidelobe and hostile interference.

High frequency current source for active EMI filter, active EMI filter and use of active EMI filter. A high frequency current source having a symmetric bipolar output stage piloted by an active bias network with extended temperature range. The source is configured to provide high impedance at 1 MHz and above. The invention includes such active EMI filter having such high frequency current source, for example in a current sense current injection feedback configuration.

A full-duplex communication apparatus and method are provided, and relate to the field of communication technologies, to improve a self-interference cancellation capability of the full-duplex communication apparatus. The full-duplex communication apparatus includes a first antenna, a second antenna, and a gating apparatus. The full-duplex communication apparatus may receive a first signal from the first antenna through the gating apparatus, and perform interference suppression or cancellation on the first signal; and may further transmit a signal through the second antenna.

A method for reducing noise using a neural network-based adaptive line spectrum enhancer includes receiving an input signal including a narrowband signal and noise. The narrow signal and the noise are decorrelated via an artificial neural network. The artificial neural network generates an estimate of the narrowband signal. The noise in the input signal is reduced based on the estimated narrowband signal.

The invention provides a flexible wearable instant detection device. The flexible wearable instant detection equipment comprises a flexible circuit structure and an anti-interference antenna assembly, the flexible circuit structure comprises a flexible circuit layer and a thin film electrode type sensor, and the sensor is printed on the flexible circuit layer; the anti-interference antenna assembly comprises a multi-band conformal antenna and a frequency selection surface layer, the multi-band conformal antenna is embedded in the equipment middle frame, and the frequency selection surface layer is arranged on the equipment back shell. According to the device, high-comfort wearing is achieved through the flexible printed circuit and the conformal antenna technology, the multi-band anti-interference design and the self-checking circuit module are combined, and the signal stability and the device reliability are improved.

A method of operating a signal isolation device includes receiving an input signal at an input of a transmit die and, in response, generating a corresponding time-varying voltage at a transmitter output of the transmit die. The time-varying voltage is coupled to a transmit coil disposed within a receiver die. A receive coil is induced to generate an intermediate signal in response to the time-varying voltage being coupled to the transmit coil, wherein the intermediate signal corresponds to the input signal. The intermediate signal is coupled to receiver circuitry disposed within the receiver die. Electromagnetic noise generated by the receive coil is shielded from the receiver circuitry by a shield positioned between the receive coil and the receiver circuitry.

The invention provides a receiving method and system with multipath complex coupling suppression efficiency. The receiving system comprises a receiving balance converter, a first high-power fast-response suppression module, a second high-power fast-response suppression module, a high-suppression differential band-pass module, a first low-noise amplifier, a second low-noise amplifier, a rear-end system and a shielding case. According to the invention, the current situation that the protection efficiency is limited when the current receiving system uses a single protection method, and a narrow-band high-power front door coupling damage signal and a broadband / ultra-broadband outer rear door coupling interference signal cannot be considered at the same time is solved, and the comprehensive protection of the receiving system against strong electromagnetic interference attack in a normal working state is realized.

A method and apparatus for transmitting a data signal, comprising receiving a digital data signal by a first data input of a transmitter multiplexer; inverting the digital data signal by a first inverter, thereby providing an inverted digital data signal; receiving the inverted digital data signal by a first inverted data input of the transmitter multiplexer; counting a clock signal by a first counter; transmitting a first select signal to a first select signal input of the transmitter multiplexer in response to the first counter counting a threshold number of clock cycles by the first counter; and alternately transmitting the digital data signal and the inverted digital data signal as a transmitter output signal to a receiver in response to the first select signal and by a first digital data signal output of the transmitter multiplexer, the receiver and the digital data signal output operably coupled to a data link.

This refrigerator comprises: a storage chamber; a motor; a door configured to open and close the storage chamber; a compressor configured to supply cold air to the storage chamber, wherein the compressor is configured to compress a refrigerant by using rotation of the motor; a first printed board assembly (PBA) including a first communication circuit and a first processor, the first communication circuit including a first low-pass filter including a first variable resistor and a first variable capacitor, and the first processor being connected to the first communication circuit; and a second PBA including a second communication circuit and a second processor, the second communication circuit including a second low-pass filter including a second variable resistor and a second variable capacitor, and the second processor being connected to the second communication circuit, wherein the first processor is configured to: set a resistance value of the first variable resistor and a capacitance value of the first variable capacitor on the basis of rotational speed information of the motor; and communicate with the second processor through the first communication circuit by using an asynchronous communication method.

A communication device includes an inter-layer interference cancellation circuit to cancel a first inter-layer interference of a first observation signal to generate a first interference cancellation signal; a first determination circuit coupled to the interlayer interference cancellation circuit for determining a first center of a first search area according to the first interference cancellation signal; a second decision circuit, coupled to the first decision circuit, for determining a first size of the first search area according to a first Gaussian interruption probability and a first signal-to-noise ratio; and a third decision circuit, coupled to the second decision circuit, for determining a first number of at least one first candidate symbol of the first interference cancellation signal according to the first size of the first search area.

The present invention provides a single sideband signal generator including a modulator configured to generate a first and a second modulated optical signals which have equal amplitudes but opposite phases; a first optical delay line-based sideband suppressing optical circuit for generating a full-carrier single sideband signal and / or a second optical delay line-based sideband suppressing optical circuit for generating a carrier-suppressed single sideband signal. The present invention simplifies the structure by saving half of the space occupied by the redundant signal electrodes and also reducing the RF power consumption by half by removing the RF hybrid. The provided single sideband signal generator can enable compact, low-cost, and power-efficient SSB signal generation and be easily scaled to higher frequency domains without additional cost by appropriately designing the optical delay line length.