116results about "Electrical apparatus interference reduction" patented technology

The invention discloses an unmanned aerial vehicle noise elimination method and device for cross-medium direct acoustic communication, and the method comprises the steps: carrying out the sampling of a known detection signal and a receiving signal, obtaining a frequency domain expression, calculating a cross-medium sound pressure transmission function, and extracting amplitude response, phase response and group delay; based on a normalization ratio and local maximum detection method, identifying a center frequency set of unmanned aerial vehicle propeller noise; the notch depth, bandwidth, frequency compensation and phase compensation are determined by combining channel characteristic parameters, and a cascade notch filter is constructed; and inputting the channel characteristic parameters into the deep learning model, outputting a filter parameter correction amount, realizing dynamic updating of the filter, obtaining the filter capable of suppressing noise, and further obtaining a denoised communication signal. According to the invention, precise detection of propeller noise frequency and multi-dimensional adaptive adjustment of filter parameters can be realized.

The invention relates to the technical field of transformers, in particular to a signal transformer for multi-path signal coupling of a low-voltage power grid, the signal transformer comprises a magnetic core, an inlet wire winding and an outlet wire winding, efficient electromagnetic coupling and isolation of multi-path signals are achieved through the magnetic core, and a main control chip can send control signals to equipment through a driver and a coupling winding. And receiving an equipment feedback signal. The system can extract characteristics of a control signal and a feedback signal in real time, dynamically calculate a comprehensive crosstalk index, and adaptively adjust parameters of a receiving filter and a driver according to the comprehensive crosstalk index, so that signal crosstalk caused by physical coupling among multiple channels is effectively inhibited. According to the scheme, the structure is simplified, the system cost is reduced, the communication quality and the anti-interference capability of multiple paths of signals in a low-voltage power grid are remarkably improved, and the system is suitable for multiple occasions such as high-reliability power line communication.

Interface devices and systems that include interface devices are disclosed. In some implementations, a device includes a transceiver configured to transmit and receive data, a lane margining controller in communication with the transceiver and configured to control the transceiver to transmit, through a margin command, to an external device, a request for requesting a state of an elastic buffer of the external device, and control the transceiver to receive the state of the elastic buffer of from the external device, and a port setting controller adjust a clock frequency range of a spread spectrum clocking scheme based on the state of the elastic buffer.

A method of protecting an RF system from destructive effects of hazardous electromagnetic interference (EMI) comprises separating incoming electromagnetic radiation including hazardous electromagnetic interference according to frequency into low frequency spectral components below a selectable cutoff frequency and high frequency spectral components above the selectable cutoff frequency, and routing the low frequency portion of spectral components which include a vast majority of energy contained in the hazardous electromagnetic interference to ground via a low impedance conductor.

The invention provides a WAPI access module driver-free access method, which comprises the following steps: acquiring a transient electromagnetic pulse intensity magnitude of a WAPI access module in substation deployment, recording data packet error code position distribution, acquiring an actual distance measurement result of the module and a terminal, and forming a comprehensive monitoring record; identifying an interference area division boundary according to the comprehensive monitoring record, extracting an anti-interference shielding demand level and an anti-interference frequency band coverage range, and obtaining a specific interference intensity magnitude distribution file of the area; according to the thickness partition candidate implementation scheme, identifying the influence degree of the volume increase of the shielding layer on the installation position far away from the communication node, and obtaining a signal path extension risk assessment result; and evaluating the communication delay increase and the signal attenuation degree when the signal path extension risk evaluation result exceeds the drive-free access allowable range, and generating an adjusted shielding layer thickness partition implementation scheme.

The utility model relates to the field of communication equipment, in particular to anti-interference communication transmission equipment. The device comprises a shielding shell, a plurality of interfaces, a data connector, a shielding layer and a partition plate, the shielding shell comprises an outer layer, a middle layer and an inner layer, the outer layer is connected to the inner side in a sleeved mode, the middle layer is located between the inner layer and the outer layer, the multiple interfaces are formed in one side of the shielding shell, and the data connector is inserted into any one of the multiple interfaces. The shielding layer is connected to the outer layer of a cable of the data connector in a sleeved mode, the partition plate is arranged in an inner containing space of the shielding shell and divides the shielding shell into a power source area, a signal processing area and a transmission area, the power source area is communicated with the interfaces, and the signal processing area is communicated with the transmission area. The signal processing area and the transmission area are both located on one side of the power supply area.

An inductor device includes an 8-shaped inductor and a ring-type wire. The ring-type wire is disposed around an outer side of the 8-shaped inductor. The 8-shaped inductor includes an input terminal and a center-tapped terminal. The input terminal of the 8-shaped inductor is located on a first side of the inductor device, and the center-tapped terminal is located on a second side of the inductor device. The ring-type wire includes an input terminal and a ground terminal. The input terminal of the ring-type wire is located on the first side of the inductor device, and the ground terminal is located on the second side of the inductor device. The input terminal of the ring-type wire is coupled to the input terminal of the 8-shaped inductor.

A communication system for use in a vehicle includes a first communication device configured for operation in the vehicle, and a second communication device configured for operation in the vehicle. A cable assembly communicatively couples the first communication device with the second communication device. A signal suppressing device is coupled to the cable assembly at a location proximate to an end of the cable assembly. The signal suppressing device is configured to suppress signals in a frequency range corresponding to in-band radiated emission (RE).

The application discloses a signal transmission device and an electrical appliance, and relates to the technical field of electromagnetic compatibility, wherein the signal transmission device comprises a first lead-out wire and a second lead-out wire, an input end of the first lead-out wire is connected with a first device, and an output end of the first lead-out wire is connected with a second device; the second lead-out wire has a first reference point, and an input end of the second lead-out wire is connected with the first device; at least part of the first lead-out wire is arranged close to the first reference point of the second lead-out wire, and after the first lead-out wire is arranged close to the first reference point of the second lead-out wire, electromagnetic waves in the first lead-out wire and electromagnetic waves in the second lead-out wire are coupled with each other. The technical scheme provided by the application aims to shorten the distance between the first lead-out wire and the second lead-out wire, so that electromagnetic waves of the two are coupled, thereby realizing the miniaturized design of the electronic device while reducing electromagnetic interference.

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.

A communication control device is configured to select a communication frequency band for communicating between a vehicle and an external base station when starting communication between the vehicle and the external base station. In selecting the communication frequency band, the communication control device measures or determines the amount of electromagnetic noise in each frequency band inside the cockpit module, and including the communication frequency band. Then, the communication control device identifies an electrical device that is a source of the electromagnetic noise based on frequency bands in which the amount of electromagnetic noise is greater than or equal to a predetermined value. The communication control device sets an operating clock frequency of the electrical device to a first frequency band that differs from the communication frequency band.

Embodiments of a microelectronic package include a package body, radio frequency (RF) circuitry contained in the package body, and a topside input / output (I / O) interface formed on an exterior surface of the package body, and a coaxially-shielded RF interposer. The first coaxially-shielded RF interposer includes a dielectric interposer body, a first signal-carrying via electrically coupled to a topside signal terminal included in the topside I / O interface, and a first coaxial shield structure. The first coaxial shield structure is bonded to the dielectric interposer body, is electrically coupled to a first topside ground terminal further included in the topside I / O interface, and extends at least at least partially around an outer periphery of the signal-carrying via.

Systems, methods, and instrumentalities are disclosed for transmitting a message. For example, a first radio access technology (RAT) and / or a second RAT may be determined. The first RAT may be determined for reception of data. The second RAT may be determined for the reception of the data, perhaps for example based on an indication received via the first RAT. The data may be received via a first node associated with the first RAT and a second node associated with the second RAT.

A wireless power system has a wireless power transmitting device and a wireless power receiving device. A clock signal may be provided to inverter circuitry in wireless power transmitting circuitry at a power transmission frequency. The clock signal may cause transistors in the inverter circuitry to turn on and off to create AC current signals through the wireless power transmitting coil. The clock signal may be processed to mitigate electromagnetic interference in the system.

Provided are: a radio wave absorber which has sufficient radio wave absorption characteristics in a higher frequency band of 20-300 GHz, and is capable of self-standing while having an area of at least a certain size; and a radio wave absorbing device using said radio wave absorber. This radio wave absorber comprises: a radio wave absorbing layer 1; and a reinforcement layer 2 disposed on the radio wave 10-incident surface side of the radio wave absorbing layer, wherein the radio wave absorbing layer contains resin binders 1c and at least one among magnetic iron oxide powders 1a, which magnetically resonate in a frequency band of 20-300 GHz, and carbon-based fine particles 1b, the reinforcement layer 2 is formed of a dielectric material, and said radio wave absorber has a plate shape in which the thickness is smaller than the principal surface, and can be self-standing.

A communication system in a vehicle includes a first communication device having a first ground, and a second communication device having a second ground. A shielded cable communicatively connects the first communication device and the second communication device. The shielded cable includes i) a signal wire that is electrically connected to the first communication device and the second communication device, and ii) a shield that is electrically coupled to the first ground and the second ground. A first wire electrically connects the first ground to a chassis of the vehicle at a first point. A second wire electrically connects the second ground to the chassis proximate to the first point to mitigate effects of electromagnetic interference (EMI) on the communication system.

The present invention provides a common-mode transient suppression protection circuit for a digital isolator, including a modulation circuit, a demodulation circuit and an isolation capacitor connected between the modulation circuit and the demodulation circuit. The modulation circuit includes a modulation circuit front-end and a drive circuit, which are connected in sequence, and a clamping module is arranged in the drive circuit. The protection circuit further includes a linear voltage regulator structure connected with the drive circuit, and a power supply clamp is arranged in the linear voltage regulator structure. By providing the linear voltage regulator structure having the power supply clamp and the drive circuit having the clamping module in the protection circuit, low-voltage devices in the drive circuit can be protected from being damaged by high-voltage signals generated by common-mode transient interference.

In an embodiment, a method includes: determining a bin corresponding to a radio frequency interference (RFI) spur in a signal, the bin based on a first sampling frequency of a timing loop in a receiver; determining a shift of the first sampling frequency to a second sampling frequency; updating the bin based on the shift; setting a filter coefficient of a notch filter based on the updated bin; suppressing the RFI spur using the notch filter, and establishing link-up between the receiver and another device after suppressing the RFI spur.

A radio wave anomaly detection system outputs a detection result about a radio wave anomaly that is included in received data and has been detected using a first feature that is a feature extracted from the received data every first predetermined time period, and a second feature that is a feature extracted from the received data every second predetermined time period longer than the first predetermined time period.

This disclosure provides systems, methods, and devices for wireless communication that support signaling of network entities' phase noise inter-carrier interference (ICI) order for reducing user equipment (UE) phase noise cancelation complexity. In a first aspect, a method of wireless communication includes obtaining a power spectral density (PSD) measurement of a phase noise mask of a network entity prior to deployment in the field. The network entity, after deployment, measures an integrated residual PSD measurement per candidate phase noise bandwidth size and transmits these integrated residual PSD measurements to a UE. The UE may then use the integrated residual PSD measurements to estimate phase noise for cancelation from network entity transmissions. Other aspects and features are also claimed and described.

Systems, methods, and instrumentalities are disclosed for transmitting a message. For example, a first radio access technology, RAT, and / or a second RAT may be determined. The first RAT may be determined for reception of data. The second RAT may be determined for the reception of the data, perhaps for example based on an indication received via the first RAT. The data may be received via a first node associated with the first RAT and a second node associated with the second RAT.

The disclosure described herein configures a multi-narrowband transceiver for communicating within a television white space (TVWS) spectrum using a logarithmic periodic filter, wherein the logarithmic periodic filter includes a plurality of filter elements, each filter element having a filter frequency that increases periodically with the same frequency increase factor (K). Each filter in the plurality of filter elements is configured to filter out second harmonics within a defined frequency range. The present disclosure determines a TVWS channel for communication and switches to a filter element in the plurality of filter elements that corresponds to the determined TVWS channel. Data is transmitted and / or received using the filter element through the TVWS channel, thereby allowing narrowband communication through the TVWS channel.

A radiofrequency trap component system includes a resonant LC circuit including a capacitive element and an inductive element, wherein the inductive element includes primary inductor rings positioned in proximity to a modulation ring. The radio frequency trap component system further includes a radiofrequency noise detector configured to detect a noise level of radiofrequency noise interacting with an electromagnetic radiofrequency noise recipient in a computing device and controller circuitry communicatively coupled to the radiofrequency noise detector and configured to determine that the detected noise level satisfies an interference condition and to tune a radiofrequency bandwidth at which the resonant LC circuit resonates by modulating electrical current supplied to the modulation ring of the inductive element in the resonant LC circuit, based at least on determining that the detected noise level satisfies the interference condition.

The present disclosure provides systems, methods, and devices for wireless communication that support signaling of a phase noise inter-carrier interference (ICI) order for a network entity for reducing user equipment (UE) phase noise cancellation complexity. In a first aspect, a method of wireless communication includes obtaining a power spectral density (PSD) measurement of a phase noise mask of a network entity prior to a field deployment. The network entity measures integral residual PSD measurements per candidate phase noise bandwidth size after deployment, and sends these integral residual PSD measurements to the UE. The UE may then estimate phase noise for cancellation from network entity transmissions using the integral residual PSD measurements. Other aspects and features are also claimed and described.

The present invention relates to an intelligent anti-interference method for a DCSK communication system based on a software radio platform, and belongs to the field of communication anti-interference. A DCSK intelligent anti-interference system is built based on GNU Radio and a matching USRP device, comprising a DCSK transmitting and receiving module, an interference module, and an intelligent anti-interference decision module. A reinforcement learning algorithm is introduced into the decision module to establish a state set consisting of different powers, communication frequency bands, and chaotic signal waveforms, as well as an action set consisting of communication system adjustment schemes. The DCSK system can make communication quality evaluations when facing different types of interference, thereby making intelligent decisions and selections for system parameter configurations. By verifying the anti-interference performance in an actual electromagnetic environment, the method of the present invention has good anti-interference effects, can effectively resist interference without significantly increasing the transmitter transmission power, and achieves safe and reliable information transmission.

The present invention discloses a communication device and a display module based on a through-type pin header, wherein one of the communication devices based on a through-type pin header comprises: a first circuit board for outputting a display control signal; a second circuit board, isolated and arranged on one side of the first circuit board, the second circuit board being provided with a pin header interface and a pin header through hole; a female pin, arranged on the surface of the first circuit board close to the second circuit board, for transmitting a control signal to the first circuit board; a pin header, arranged between the first circuit board and the second circuit board, so that the two are connected in communication. The present invention also discloses a display device based on a through-type pin header. The communication device and display device based on a through-type pin header provided by the present invention can avoid the problem of communication signal crosstalk.

Disclosed is a signal processing method for regulating interference and interference immunity in a terminal device and a related apparatus. A terminal device obtains a state factor used for reflecting a communication state of a communication module and a usage state of a functional module. The terminal device down-regulates the source drive voltage or the source drive current when a frequency division frequency or frequency multiplication frequency of a signal transmitted on the signal line falls within a working frequency range. The terminal device up-regulates the source drive voltage or source drive current when a voltage amplitude of an electromagnetic wave component that is of an electromagnetic wave radiated by the communication module and that is coupled to the signal line is greater than a threshold. In this way, phenomena such as dropped calls and blurry screens can be mitigated, optimizing the user experience.

The invention provides a self-interference elimination method and device, electronic equipment, a storage medium and a product. The method comprises the following steps: acquiring a sending detection signal, a receiving detection signal, a mobile phone sending signal, a base station sending signal and a mobile phone receiving signal, wherein the mobile phone receiving signal comprises a receiving detection signal, a receiving signal corresponding to the mobile phone sending signal and a receiving signal corresponding to the base station sending signal; determining a near-end channel parameter based on the sending detection signal and the receiving detection signal; reverse processing is carried out on the mobile phone sending signal through the near-end channel parameters, a self-interference elimination signal is obtained, and the self-interference elimination signal is a signal opposite to a receiving signal corresponding to the mobile phone sending signal; and linearly superposing the mobile phone receiving signal and the self-interference elimination signal to obtain a receiving signal corresponding to the base station sending signal.