166 results about "Interference protection" patented technology

Apparatus and a method for enhancing the interference resistance of so-called RFID systems, wherein identification messages delivered from an identification device are longer than the time for which an anticipated interference or disturbance is calculated to continue, and wherein the messages contain redundancy, such as a checksum. The messages are delivered from the identification device repetitively, and are redundancy checked. In the event of any discrepancy in the redundancy check, such as when the checksum is checked against the data content of the message and is found in disagreement, successive messages are checked bit for bit against each other. Any deviations between otherwise previously rejected messages are assumed to be due to external interference and are thus successively substituted until the redundancy check gives an accepted result, such as through the medium of a checksum check according to the so-called CRC method.

“Tiered” groups of devices (tiered service radios) and / or licenses associated with the devices or users so as to provide a hieratical set of interference protection mechanisms for members of each tier of service are disclosed. Point-to-point and point-to-multipoint data links for any communication application, including wireless backhaul applications, are also disclosed. Exemplary systems, devices, and methods disclosed herein allow for the efficient operation of such a tiered service. Interference protection among tiered service devices belonging to one or more tiers of the service, from other devices within the same tier of service, or devices of other tiers of service, is disclosed. Identification of other devices of the same or differing tiers of service, and interference mitigation between other tiered service devices based upon intercommunication between the devices, and / or via a central registry database, are also disclosed.

“Tiered” groups of devices (tiered service radios) and / or licenses associated with the devices or users so as to provide a hieratical set of interference protection mechanisms for members of each tier of service are disclosed. Point-to-point and point-to-multipoint data links for any communication application, including wireless backhaul applications, are also disclosed. Exemplary systems, devices, and methods disclosed herein allow for the efficient operation of such a tiered service. Interference protection among tiered service devices belonging to one or more tiers of the service, from other devices within the same tier of service, or devices of other tiers of service, is disclosed. Identification of other devices of the same or differing tiers of service, and interference mitigation between other tiered service devices based upon intercommunication between the devices, and / or via a central registry database, are also disclosed.

A backhaul radio is disclosed that operates in multipath propagation environments such as obstructed LOS conditions with uncoordinated interference sources in the same operating band. Such a backhaul radio may use a combination of interference mitigation procedures across multiple of the frequency, time, spatial and cancellation domains. Such backhaul radios may communicate with each other to coordinate radio resource allocations such that accurate interference assessment and channel propagation characteristics assessment may be determined during normal operation.

The invention belongs to the field of satellite communication, and particularly relates to a method for analyzing mutual interference between satellite communication systems. According to the method provided by the invention, the relationship between a phase track line and an interference protection area drawn on a phase plane is analyzed to analyze the mutual interference between different satellite communication systems and determine a time and a phase angle exceeding the interference protection standard. The analysis method provided by the invention is suitable for analyzing the mutual interference between multiple satellite communication systems, an orbit position change rule is reflected in phase angle change, so that the number of intermediate variables is reduced, and the method is more intuitive and effective.

A first device may configure a second device, such as a sidelink receiver, so that an interference protection zone surrounding the second device may be dynamically adjusted in size based, for example, on various objectives and / or use cases recognized by the first device. The interference protection zone may be, for example, an area surrounding the second device, within which neighboring devices may be silenced. Changes to the interference protection zone may be achieved by providing a dynamic clear-to-send (CTS) transmit power scaling parameter, that is different from a pre-assigned constant parameter for CTS power control stored at the second device, to the second device from the first device. The second device may calculate CTS channel power using at least the dynamic CTS transmit power scaling parameter and the received RTS channel power. The second device may send a CTS message in a CTS channel at the calculated CTS channel power.

The invention relates to a method for evading co-channel interference through deflection antenna pointing and a satellite communication system. The method comprises the following steps: arranging morethan one space-borne antenna on an NGEO communication satellite; determining a constellation configuration of the NGEO satellite communication system, and ground user type and distribution, and selecting variables to describe the normal orientation of the space-borne antenna of the NGEO satellite communication system; according to an interference protection regulation for the GEO satellite systemof ITU, selecting a group of indexes alpha for balancing the interference degree of the satellite communication system to the GEO satellite system; determining a group of indexes beta for balancing link quality of the satellite communication system; establishing a nonlinear optimization model of the normal orientation of the phased array antenna according to the indexes alpha and the indexes beta; and solving optimal variables through iterations and outputting a set of optimal phased array antenna deflection pointing setting scheme. The method for evading co-channel interference through deflection antenna pointing and the satellite communication system in the present invention ensure own communication link quality and reliability requirements, so that the satellite system can coexist effectively with the GEO satellite system at the same frequency.

A method for maximizing intermodulation interference protection during a handoff between radio cell sites (300) includes scanning a plurality of radio channels (302) and measuring the signal power (307, 315) for at least one of the radio channels. One or more receiver attenuators (313) are then set based on the detection of intermodulation (IM) interference of the measured channel. The attenuators are then scaled (311) based on the degree of IM interference. If the attenuators cannot mitigate this interference below some predetermined level, the radio channel is changed (321) and the process begins again to ensure a high quality of communication with a cell site.

A method and transceiver in a secondary system for utilizing channel bandwidths allocated to a primary system. A secondary system transceiver receives a primary system signal, re-transmits a delayed version of the primary system signal, and communicates with secondary system equipment utilizing secondary system signals within at least part of a bandwidth of at least one channel of the primary system. The re-transmission of the primary system signal allows the use of primary system channels by the secondary system without adversely affecting the primary or secondary system users.

A method and apparatus for implementing a spread spectrum communication system of the "transmitted reference" type provides both multipath and interference protection with little complexity. Need for a local reference is avoided by transmitting a reference that the receiver can use to perform despreading. In general, the transmitted reference system sends both a message signal and a reference signal to the receiver. The message signal contains the information to be communicated, which has been spread through multiplication with a wide band "spreading waveform". The reference signal consists of the spreading waveform itself which the receiver call use to despread the message signal and recover the information.

The invention relates to a method for performing interference analysis and avoidance on a synchronous orbit satellite communication system, characterized by including the following steps: 1) designinga recursive orbit for medium-earth and low-earth orbit satellites in a non-synchronous orbit satellite communication system to ensure that tracks of sub-satellite points of each satellite are periodically overlapped and cross over the equator at a plurality of fixed longitude points; 2) determining a range of the synchronous orbit satellite communication system that needs to perform interferenceanalysis according to relevant protection standards of the International Telecommunication Union; 3) performing interference analysis on the synchronous orbit satellite communication system, and setting corresponding interference protection belt zones for synchronous orbit satellites; and 4) enabling an earth station of the non-synchronous orbit satellite communication system to determine whetherthe medium-earth and low-earth orbit satellites need to take avoidance measures according to predicted system parameters and the running states of each medium-earth and low-earth orbit. The method disclosed by the invention can be widely applied in the field of interference analysis and avoidance of the synchronous orbit satellite communication system.

A method for determining interference from a NGSO satellite earth detection system to a deep space detection system is disclosed. The method comprises the following steps: pinpointing locus parameters of two time varying systems; unifying a reference system of the two time varying systems; pinpointing satellite system performance parameters of both sides; determining a time arc segment concerned by interference analysis; determining total time of the interference analysis and a sampling frequency; acquiring space position information of each sampling time corresponding to the two time varying systems in the interference time arc segment respectively and acquiring sending and receiving gain at a direction of a interference link and a interference link distance length; calculating a power spectrum density when each sampling time interference signal arrives at a disturbed link receiving system; determining same frequency interference by combining an international interference protection standard. By using the method of the invention, the interference generated by the NGSO satellite earth detection system on the deep space detection system in a corresponding frequency range can be accurately determined. An antijamming capability of the deep space detection system can be increased and a project is easy to be realized.

A touch module includes a touch layer, a transparent panel module and a case. The touch layer has at least one sensor and a connection circuit arranged at least partially around the sensor. The transparent panel module is bonded with one side of the touch layer to at least cover the sensor. The case is formed with an opening for receiving the transparent panel module, whereby the transparent panel module is at least partially exposed to outer side. An inner flange is formed along at least a part of the periphery of the opening for concealing where the connection circuit of the touch layer is positioned to achieve better interference protection effect and minimize the possibility of misjudgment and mis-touch.

The invention relates to a satellite constellation implementation method for implementing communication by utilizing a recursive orbit, and the method comprises the steps: a regression period, an orbital semi-major axis, an inclination of an orbit, an eccentricity ratio and an argument of perigee of the orbit are determined; the number of satellites and orbital planes are determined as n; right ascension of ascending node and a mean anomaly of a first satellite are determined, and according to service needs of the satellite, right ascension of ascending node and mean anomaly of following satellites are determined in sequence; a geostationary orbiting satellite network set that needs to be coordinated and the width of a non-geostationary satellite to geostationary satellite interference protection band are determined; all set satellites successively passes the top in the air along a same fixed orbit are seen at any position of the ground, and when multi-coverage is formed, users on theground can see a plurality of satellites; and if satellite trails pass the interference protection band for the geostationary satellite, when present accessed satellite enters the protection band, theusers on the ground switch to another satellite that does not in the protection band to continuously implement communication.

The invention, which is suitable of the rail transport industry, provides a power supply design circuit with the high-level electro magnetic compatibility and safety regulation performance. The power supply design circuit comprises an input unit, an isolation filtering protection unit and an output unit, wherein the units are successively connected. The isolation filtering protection unit includes an electromagnetic anti-interference protection circuit, an electromagnetic interference filtering circuit, and an isolation circuit; the electromagnetic anti-interference protection circuit clamps and discharges a common-mode interference signal and a differential-mode interference signal that are outputted by the input unit; and the electromagnetic interference filtering circuit carries out common-mode filtering on an input signal and an output signal of the isolation circuit and carries out differential-mode filtering on the input signal of the isolation. Because of the electromagnetic anti-interference protection circuit and the isolation circuit, the input unit and the output unit are isolated a PCB board space design is carried out, so that the high isolation insulated voltage requirement can be met and the voltage-resistant property can be improved. Meanwhile, the electromagnetic interference filtering circuit filters an interference signal outputted by the input unit, thereby meeting the limit value requirements of radiation and conduction of the circuit.

A multi-carrier signal transmitter includes a multi-carrier modulation circuit, a power converter, a frequency converter and an interference protection determination circuit, and that the interference protection determination circuit determines a difference in power levels between a higher layer component and a lower layer component of multi-carrier signals in a manner to avoid digital interference. The power converter converts a power level of the multi-carrier signals when necessary based on a data of the determination, and the frequency converter converts a center frequency band of the multi-carrier signals when necessary based on the data of the determination. The digital interference of the hierarchical multi-carrier signals can be prevented.

The invention relates to search and rescue service and can be used for debris active sounding. Said invention makes it possible to improve interference protection related to a temperature, the operator hands motion and trembling effecting the locator operation. The inventive method consists in forming an ultrabandwidth signal (UBW) according to a reference signal, in emitting the thus formed UBW signal to space, in receiving the UBW signal, in processing the UBW signal by correlating it with a reference UBW signal, wherein while processing the received UBW signal, the reference UBW signal is delayed for a time during which the initial position of a check point on a middle section between the maximum and minimum voltage of the correlated signal is set, in periodically monitoring the position of said check point and in modifying the space emission delay of the formed UBW signal when the check point position shifts from the initial position thereof, thereby resetting the check point position.

The invention discloses a method and apparatus for suppressing long-range co-channel interference and relates to the technical field of communication. The method and apparatus solve a problem of low communication quality of a base station of a cell caused by long-distance co-channel interference. The method comprises the following steps: monitoring whether a first base station is subjected to long-distance co-channel interference; if yes, acquiring an interference symbolic number which is the number of symbols of the long-distance co-channel interference affecting the uplink signal of the first base station; and calculating interference protection distance based on the number of symbols of the guard interval time slot of the first base station, the interference symbolic number, and signal transmission speed; turning off the symbols, the same as the interference symbolic number, in the downlink signal of the second base station, wherein the second base station is a base station that communicates by using the same frequency band of the first base station within the interference protection distance of the first base station.

The invention provides a lightning and ultra-wideband high-power microwave integral protection circuit, and relates to the technical field of interference protection. By the lightning and ultra-wideband high-power microwave integral protection circuit, ultra-wideband high-power microwave and lightning can be simultaneously and effectively suppressed. The lightning and ultra-wideband high-power microwave integral protection circuit comprises a first filtering circuit, a second filtering circuit and a lightning suppression circuit, wherein the first filtering circuit is used for filtering a high-frequency component of a high-power microwave signal except a working frequency band signal, the second filtering circuit is used for filtering a low-frequency signal except the working frequency band signal, and the lightning suppression circuit is used for releasing a lightning current.

The invention discloses a power 5G application-oriented network channel security protection system, and the system comprises a cloud layer and a management layer; the cloud layer comprises a production control area, an information management area, an internet area and a 5G operation core network, and the management layer comprises a power dispatching data network, a data communication network and an operator network; in a network channel transmission process of service data between a cloud layer and a management layer, anti-interference protection is carried out on the service data through a low-delay service channel anti-interference technology, so abnormal transmission caused by interference in a low-delay service channel is avoided; the power dispatching data network, the data communication network and the operator network are protected through a network channel isolation technology, so that the access safety and the operation safety of power services are met; the 5G operation core network and the operator network are maintained through a network channel isolation technology, and the 5G operation core network and the operator network isolate interactive network slices through a slice isolation technology, so unauthorized access between the network slices is prevented.

The invention relates to the technical field of interference protection and discloses a high-power capacity and high-power microwave protection device. The device comprises an input interface, an output interface, a multi-stage steady-state filter circuit and a three-stage transient bleeder circuit, wherein the multi-stage steady-state filter circuit is composed of a plurality of steady-state filter circuits connected in series, two ends of the multi-stage steady-state filter circuit are connected with the input interface and the output interface through microstrip lines respectively, and thethree-stage transient bleeder circuit is connected in parallel with the steady-state filter circuit through an impedance matching line. The device is large in rated power capacity, small in insertionloss, high in response speed, high in universality, convenient to install and maintain, capable of effectively preventing high-power microwaves from damaging electronic equipment, and capable of beingapplied to high-power microwave protection of short-wave, ultra-short-wave and other receiving and transmitting integrated communication systems.

An electric drive, in particular a wiper drive for vehicles, is proposed, with an electric driving motor in a motor housing (50), a brush holder (10) projecting into the motor housing (50), an anti-interference module (18) which is connected electrically and mechanically to the brush holder (10) and is intended for the electrical connection and interference protection of the motor, and with a gear mechanism (52) which is attached to the motor housing (50), at least partially accommodates the anti-interference module (18) and is designed in accordance with the predetermined position of the output shaft (53) with respect to the drive shaft (58). According to the invention, the diversity of components of the electric drive and therefore, in particular, the diversity of tools for producing the components are reduced by the anti-interference module (18) and the brush holder (10) being equipped with corresponding retaining means (40, 44) which permit the installation of a structurally identical anti-interference module (18) on the brush holder (10) in two installation positions rotated through 180°.

The invention relates to the technical field of interference resistance of wireless communication equipment, and discloses an ultra-short wave radio station interference protection device which comprises an interference sampling antenna array, a radio frequency switch module, a radio frequency signal conditioning module, an adjustable radio frequency agility module and a digital signal processing module. A non-cooperative interference cancellation algorithm module, a signal intelligent sensing algorithm module and a display control algorithm module are arranged in the digital signal processing module. According to the interference protection device for an ultra-short wave radio station, the difference in the aspects of transmission channels and waveform characteristics of communication signals and interference is utilized, cancellation algorithm parameters are configured through signal perception andsignal quality of feedback, loops of signal perception, interference cancellation and signal quality evaluation feedback are formed, and non-cooperative interference signals are adaptively separated and cancelled.

The invention relates to a charging-type portable pA micro current monitoring system. The system adopts a single lithium battery for a unit for storing and supplying electric energy, a low-power consumption and high-precision operational amplifier and a feedback circuit are adopted, with a pA-level micro current I / V conversion circuit as a core, through multiple anti-interference protection circuits, USB is selected for charging through a charging switch, system power supply is selected through a power supply selection switch, the system power supply comes from the USB in match with the lithium battery, and monitoring on the pA micro current is completed. The charging-type portable pA micro current monitoring system can be used as a portable measurement instrument and can be used indoors, outdoors and other places in need of monitoring, power supply by the lithium battery can be realized both indoors and outdoors, and power supply by the USB is also realized. The size of the monitor of the invention is only the size of a palm, the weight is light, carrying is facilitated, the monitoring precision is high, the price is low, the testing is convenient, and a corresponding conversion voltage value can be tested when to-be-monitored micro current is inserted according to requirements.

The invention relates to a heat remote transfer, storage and discharging structure with a heat bridge effect. The heat remote transfer, storage and discharging structure with the heat bridge effect comprises an energy storage block, a heat dissipation block and a heat collecting block, wherein the heat dissipation block is connected with the energy storage block, the heat collecting block is connected with the energy storage block, the energy storage block comprises a metal shell and a heat conduction grid filled with a heat conduction energy storage material, the heat conductivity coefficient of the heat conduction grid is higher than that of the heat conduction energy storage material, and the heat bridge effect is formed inside the energy storage block. The heat remote transfer, storage and discharging structure with the heat bridge effect has the advantages that the heat bridge effect is formed in the energy storage block through the different heat transfer coefficients of the heat conduction grid and a phase-changing energy storage heat conductor, the heat storage and discharging rate of the heat storage and discharging structure is increased, the energy storage density of the heat storage and discharging structure is improved through phase-changing latent heat of the heat conduction energy storage material, the heat dissipation rate of the heat storage and discharging structure is controlled through the heat dissipation block so that heat interference protection for the energy storage block can be achieved, the heat collecting block can quickly transfer heat into the energy storage block for storage, and heat recovery and energy storage within a small space or by a large distance can be achieved.