76results 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.

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.

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.

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.

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 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.

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.

The invention relates to a system for an on-board electrical system of a vehicle, wherein the on-board electrical system comprises an inverter (2) and a battery (4), wherein the system comprises at least one primary shielded external electrical connection (8) and an EMC filter device (6), wherein the EMC filter device (6) is connected on the one hand to the inverter (2) via the at least one primary shielded external electrical connection (8) and on the other hand to the battery (4) via at least one secondary external electrical connection (12).

Logic to communicate an unprotect signal to a platform controller, the unprotect signal to indicate a first time frame during which protection of wireless communications from internal interference received at an antenna is not requested. The internal interference to comprise electromagnetic radiation emanating from a platform device based on operations by the platform device at a clock frequency. The protection to involve adjustment, by the platform controller of a clock frequency for the operations.

An apparatus, namely an infrared (IR) interference shield, is described that can be utilized with a vehicle that employs hydrogen fueling, such as a fuel cell electric vehicle (FCEV). For example, the IR interference shield is mounted onto the vehicle's hydrogen fueling receptacle. The IR interference shield is distinctly structured to reduce or prevent interference of IR wireless communication between a vehicle-side IR transmitter on the receptacle, and an IR receiver of the hydrogen fueling station. The IR interference shield can block interference to IR signals that may negatively affect IR wireless communication between the hydrogen fueling station and the vehicle. Thus, the IR interference shield improves reliability of the communication between the vehicle and the hydrogen fueling station, thereby improving the overall effectiveness and efficiency of the hydrogen refueling process.

A network device includes: a radio configured to operate in a 2.4 GHz Wi-Fi band; a 32 bit double data rate (DDR) memory having instructions stored therein; a system clock configured to operate at 533 MHz; and a processor. The processor is configured to execute the instructions stored on the memory to cause the network device to: operate the 32 bit DDR memory at 1067 MHz; instruct the radio to transmit data to be transmitted in the 2.4 GHz Wi-Fi band; and instruct the radio to receive data to be received in the 2.4 GHz Wi-Fi band.

In an embodiment, a method (800) 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 (802); determining a shift of the first sampling frequency to a second sampling frequency (804); updating the bin based on the shift (806); setting a filter coefficient of a notch filter based on the updated bin (808); suppressing the RFI spur using the notch filter (810); and establishing link- up between the receiver and another device after suppressing the RFI spur (812).

The application discloses a kind of transmission line crosstalk characteristic parameter determination method, device, equipment and medium.The method comprises the following steps: obtaining the line attribute parameter set of at least two adjacent transmission lines with crosstalk;Determine the fitting relationship between each attribute parameter in the line attribute parameter set and line operation parameter;According to each attribute parameter in the line attribute parameter set and the fitting relationship between each attribute parameter in the line attribute parameter set and line operation parameter, determine the characteristic parameter corresponding to the at least two adjacent transmission lines with crosstalk, by the technical scheme of the application, the characteristic parameter corresponding to the transmission line with crosstalk can be determined, so as to carry out rectification and optimization according to the characteristic parameter corresponding to the transmission line with crosstalk.

The invention relates to the technical field of anti-interference signal transmission, in particular to an anti-interference signal transmission method for a robot connector, and the method comprises the steps: analyzing the cross correlation between a common-mode voltage signal and a differential voltage signal, and the change condition of the common-mode voltage signal, determining the interference conversion accumulation degree of the robot connector, and determining the interference conversion accumulation degree of the robot connector; determining a distortion accumulation risk value; and on the basis of the change condition of the common-mode voltage signal at each moment and in combination with the distortion accumulation risk value, determining a compensation current at each moment so as to suppress the coupling of the common-mode voltage signal of the robot connector to the differential voltage signal. The problem of signal distortion caused by insufficient common-mode rejection capability of the robot connector in a strong electromagnetic interference environment is solved, conversion from common-mode interference to differential-mode interference is suppressed through dynamic monitoring and real-time compensation current generation, and the stability and anti-interference capability of signal transmission are improved.

The invention relates to a method for reducing electromagnetic radiation emanating from an electrical line (14), wherein the electrical line (14) is supplied by at least one first electrical supply line (10) and at least one second electrical supply line (12), comprising at least measuring the currents (50, 52) flowing in the first supply line (10) and in the second supply line (12) using current sensors (20, 22); determining high-frequency current components (60, 62) of the currents (50, 52) of the first and the second supply lines (10, 12); summing the high-frequency current components (60, 62) in an adder (30); supplying an output signal (32) of the adder (30) to a first input (42) of an amplifier (40);Determining a compensation current (56) in the amplifier (40) for a current (54) in the line (14) that keeps the current (54) in the line (14) free of the high-frequency current components (60, 62). The invention further relates to an arrangement (100) for reducing electromagnetic radiation emanating from an electrical line (14).