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45results about How to "Avoid self interference" patented technology
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Ultra wideband communication system, method, and device with low noise reception
InactiveUS6859506B1Avoid problemsAvoid self-interferenceModulated carrier system with waveletsError preventionLow noiseSignal on
An ultra-wide band (UWB) waveform receiver with noise cancellation for use in a UWB digital communication system. The UWB receiver uses a two-stage mixing approach to cancel noise and bias in the receiver. Self-jamming is prevented by inverting a portion of the received signal in the first mixer and then coherently detecting the partially and synchronously inverted signal in the second mixer. Since the drive signals on both mixers are not matched to the desired signal, leakage of either drive signal does not jam the desired signal preventing the receiver from detecting and decoding a weak signal.
Owner:NORTH STAR INNOVATIONS
Relays in telecommunications networks
ActiveUS20100297936A1Reduces and prevents interferenceAvoid interferenceTransmission path divisionNetwork topologiesTelecommunications linkTelecommunications network
In a telecommunications network including a plurality of mobile terminals in communication with a network base station, and a plurality of relay nodes configured to assist the base station with data transmissions between the base station and one or more of said plurality of mobile terminals, a method of enabling communication resource reuse amongst the plurality of said relay nodes, the method comprising: predefining a plurality of communication resource sets, each resource set comprising one or more communication resource elements, the communication resource sets arranged so that each relay node can receive data in a predefined receiving resource set and transmit data in a predefined transmission resource set; determining which of two or more relay nodes are spatially separated from one another; and configuring at least two of the two or more spatially separated relay nodes to use the same communication resource sets.
Owner:VODAFONE IP LICENSING
Radio forwarding communication system and method
ActiveCN101034931AImprove throughputImprove defectsRadio transmissionMulti-frequency code systemsFrequency division duplexWireless network
An interim wireless communications system, including base stations BS, transit stations and user terminals RS; the RS and BS respectively, provide user terminals and communication interface, the RS includes a frequency division duplex FDD wireless transceiver and network-based coding technology wireless link layer processing unit; BS and end users FDD - included in both wireless transceiver and decoding technology based on the wireless network link layer processing unit; RS, BS and user terminals FDD wireless transceiver contains the wireless transmitter FDD physical layer processing units and wireless receiver FDD physical layer processing unit; the transmitter RS FDD physical layer department rationale receiver modules and FDD physical layer processing unit with BS and user terminals in receiver FDD physical layer processing units and wireless transmitter FDD physical layer processing unit counterparts. In addition, the inventionincludes a transit system based on the communication method whichcanincrease the throughput of transit.
Owner:XFUSION DIGITAL TECH CO LTD
Method and device for processing self-interference of inter-band carrier aggregation
ActiveCN103002450APrevents impacting carrier aggregation performanceAvoid self-interferenceTransmission path divisionCriteria allocationCarrier signalFrequency band
The invention discloses a method for processing self-interference of inter-band carrier aggregation. The method includes that a self-interference combination set is created for a receiving frequency band in each carrier aggregation frequency band supported by equipment; and the equipment detects whether other transmission frequency bands meeting switching conditions are available or not when the receiving frequency bands are in receiving states and the equipment determines that current transmission frequency bands are in the self-interference combination sets of the receiving frequency bands, and a self-interference avoiding selection strategy is actuated according to a detection result. The invention further discloses a device for processing the self-interference of the inter-band carrier aggregation. According to the scheme, the method and the device have the advantages that the self-interference of the inter-band carrier aggregation can be prevented, and problems of influence of the self-interference of the inter-band carrier aggregation to the performance of carrier aggregation and communication loss are prevented.
Owner:射阳县农牧渔业总公司
Radio transfer communication system and method based on admixture of FDD and TDD
InactiveCN1960207AEnsure normal communicationAvoid the following distractionsRadio transmissionMulti-frequency code systemsBase stationPhysical layer
The invention mainly consists of the base station (BS), the relay station (RS), and the user terminal (UT). RS provides interfaces to comm. respectively with BS and UT. RS includes two time-division duplex (TDD) wireless emitter physical layer units (WEPLU) working on different frequencies and two TDD wireless receiver's physical layer units (WRPLU) working on corresponding different frequencies. BS and UT possess respectively FDD-WEPLU and FDD-WRPLU working on the corresponding frequencies against the RS frequencies. Besides, the invention sets related physical layer frame structure of BS and RS. Therefore, the wireless relay comm. can be realized between BS and RS via the physical layer frames. Via the FDD-TDD combination / TDM / TDMA, the invention ensures the relay comm. between RS, BS and MS / SS effectively and avoids the various interferes may be existed effectively.
Owner:HUAWEI TECH CO LTD
Ultra wideband communication system, method and device with low noise reception
InactiveUS20050129153A1Avoid problemsAvoid self-interferenceModulated carrier system with waveletsError preventionLow noiseSignal on
An ultra-wide band (UWB) waveform receiver with noise cancellation for use in a UWB digital communication system. The UWB receiver uses a two-stage mixing approach to cancel noise and bias in the receiver. Self-jamming is prevented by inverting a portion of the received signal in the first mixer and then coherently detecting the partially and synchronously inverted signal in the second mixer. Since the drive signals on both mixers are not matched to the desired signal, leakage of either drive signal does not jam the desired signal preventing the receiver from detecting and decoding a weak signal.
Owner:NORTH STAR INNOVATIONS
Near field, full duplex data link for use in static and dynamic resonant induction wireless charging
ActiveCN107112123AAvoid self-interferenceNear-field transmissionTransformersWireless power transferData linking
A full duplex, low latency, near field data link controls a static and / or dynamic resonant induction, wireless power transfer system used for recharging electric vehicles and other electrically powered devices. A coherent transponder configuration enables low complexity synchronous detection and positive rejection of signals originating from nearby and adjacent vehicles. A reference crystal oscillator in the ground side apparatus provides frequency synchronization for both the forward and the return data links. Transmission is by means of near field magnetic induction between pairs of loop antennas which, together with the effective waveguide below cutoff structure comprised by the vehicle underbody and the ground surface, largely restrict signal propagation to the area in the immediate vicinity of the system antennas.
Owner:感应电动车有限公司
A system and method for wireless transfer communication
ActiveCN1964222AEnsure normal communicationSimple structureActive radio relay systemsRadio transmission for post communicationCommunications systemPhysical layer
The related wireless transfer communication method comprises: in down and up subframe of BS physical layer frame structure, setting down and up transfer areas; setting down / up transfer area on down / up subframe of BS physical layer frame structure to define and receive the transfer data time slot of BS down / up transfer area; among BS, RS and UE, using the said set BS and up-down physical layer frame of RS for wireless transfer communication by FDD way. This invention can ensure the transfer communication without interface.
Owner:HUAWEI TECH CO LTD
Method for detecting system self-interference in time division duplex wireless honeycomb communication network
InactiveCN101154959ASelf-interference discoverySelf-interference and timely avoidanceCode division multiplexRadio transmission for post communicationSelf interferenceHoneycomb
The present invention discloses a method for detecting the system self-interference in the time division duplex wireless cellular communication network, which comprises the steps of: confirming the business area coverage for detecting self-interference; arranging an exclusive transmitting cell in the business area coverage, and other cells are arranged to be receiving cell; arranging a carrier frequency and synchronous measuring frame for all the cells in the business area coverage; arranging time slot in the measuring frame for the transmitting cell in the assigned carrier frequency and at the same time arranging receiving time slot in the measuring frame for all the receiving cells in the assigned carrier frequency; assigning the transmitting time slot to transmit the signal of the cell when the transmitting cell is in the assigned carrier frequency; assigning the receiving time slot in the measuring frame to receive the transmitted signal when the receiving cell is in the assigned carrier frequency; and judging whether a system self-interference generates between the transmitting cell and the receiving cell according to whether a transmitted signal is received by the receiving cell in the receiving time slot. The self-interference of the TDD system can be effectively detected with the method of the invention.
Owner:ZTE CORP
Terminal scheduling method, network equipment and terminal equipment
Embodiments of the present invention provide a terminal scheduling method, a network device and a terminal device, the scheduling method comprising: sending scheduling information to a terminal, the scheduling information being used for enabling the terminal to transmit data in a time division manner between at least two frequency bands in which interference occurs. According to the scheme of theinvention, uplink transmission is carried out on two frequency bands in a time division manner, so that the problem of terminal self-interference is avoided.
Owner:CHINA MOBILE COMM LTD RES INST +1
Method and apparatus for preventing signal interference in wireless relay network based on synchronous HARQ
InactiveUS20120002597A1Avoid self-interferenceImprove resource utilizationError prevention/detection by using return channelFrequency-division multiplex detailsWireless relay networkBase station
A method and apparatus for preventing interference in a relay device (1) and a mobile terminal (2) of a wireless relay network based on synchronous HARQ are provided. Wherein, the mobile terminal judges whether an uplink HARQ process will interfere with communication between the relay device and a base station (0) in a sub-frame, and if yes, the mobile terminal will suspend sending uplink signal for the uplink HARQ process in the sub-frame.
Owner:ALCATEL LUCENT SAS
Synchronous HARQ-based method and device for preventing signal interference in wireless relay network
ActiveCN101841816AAvoid self-interferenceLow costError prevention/detection by using return channelNetwork traffic/resource managementSelf interferenceInterference (communication)
The invention provides a synchronous HARQ-based method and device for preventing signal interference in the relay equipment and mobile terminal of a wireless relay network. The method comprises the following steps: the mobile terminal judges whether the uplink HARQ process interferes the communications between the relay equipment and the base station in one subframe, and if so, the mobile terminal defers the transmission of uplink signals during the uplink HARQ process in the subframe. Preferably, the mobile terminal defers all the subsequent uplink signals in the uplink HARQ process. By adopting the method and device of the invention, self-interference in the relay equipment caused by the uplink HARQ process of the mobile terminal. In addition, no change of the physical layer of the network equipment is made, thus the cost of realizing backward compatibility is lower.
Owner:ALCATEL LUCENT SHANGHAI BELL CO LTD
Correlation rotation precoding method applied to GFDM communication system
ActiveCN106330277ARealize comprehensive utilizationImprove bit error rate performanceSpatial transmit diversityTransmitter/receiver shaping networksSelf interferenceZero-forcing precoding
The invention discloses a correlation rotation precoding method applied to a GFDM communication system. The problem of relatively low symbol error rate transmission performance of a generalized frequency division multiplexing GFDM communication system in the prior art is mainly solved. The related rotation precoding method comprises the following specific steps: (1) constructing an autocorrelation matrix; (2) constructing a zero forcing precoding matrix; (3) constructing a correlation rotation matrix; (4) eliminating a multiplicative channel fading factor; (5) constructing a correlation rotation precoding matrix; (6) precoding; and (7) transmitting a to-be-transmitted symbol. The correlation rotation precoding method disclosed by the invention has the advantages of high symbol error rate performance, adverse effects caused by self-interference and multi-path channel interference can be simultaneously eliminated, the interference is utilized to improve the symbol error rate transmission performance of the generalized frequency division multiplexing GFDM communication system, meanwhile the precoding processing method of signals is simple and feasible, and the signal transmission requirements of users in a real environment can be satisfied in a multi-path channel scene.
Owner:XIDIAN UNIV
Six-leg walking robot in parallel connection driven by rotation
ActiveCN104925161AFull range of motionSimple and flexible structureVehiclesThree degrees of freedomEngineering
The invention discloses a six-leg walking robot in parallel connection driven by rotation. The six-leg walking robot comprises a frame and six driving legs in parallel connection, wherein the six driving legs in parallel connection are uniformly distributed on the frame and symmetrically mounted, each of the driving legs in parallel connection has three freedom degrees relative to the frame, and the frame has six freedom degrees in three-dimensional translation and three-dimensional rotation under the coordination of the six driving legs in parallel connection; each of the driving legs in parallel connection comprises a driving mechanism in parallel connection and a leg mechanism, which are connected through an equivalent spherical hinge alpha, wherein the driving mechanism in parallel connection adopts a three branched hinge structure, and the leg mechanism adopts a four rod structure. The six-leg walking robot disclosed by the invention is simple and flexible in structure, light in mechanisms, stable to walk, good in adaptability and suitable for high-speed heavy-load transportation operation under non-structural topographic conditions.
Owner:SHANGHAI JIAO TONG UNIV
Virtual full-duplex relay transmission method
InactiveCN107359925AAvoid self-interferenceReduce hardware complexityRadio transmissionDuplex signal operationSelf interferenceHalf duplex relay
The invention relates to a virtual full-duplex relay transmission method, which comprises the steps that K source terminals S1, S2, S3,..., SK send signals to a relay R1 in an odd-number time slot (2t-1), a relay R2 performs decoding and re-encoding on signals received in the previous time slot (2t-2) and then forwards the signals to K sink terminals D1, D2,..., DK, the K source terminals S1, S2, S3,..., SK send signals to the relay R2 in an even-number time slot 2t, the relay R1 performs decoding and re-encoding on signals received in the previous time slot (2t-1) and then forwards the signals to the K sink terminals D1, D2,..., DK, the relay R1 and the relay R2 take turns to receive and send signals, the K source terminals S1, S2, S3,..., SK always send signals, the K sink terminals D1, D2,..., DK, always receive signals, thereby realizing the same transmission efficiency with a full-duplex relay method. However, signals are sent and received alternately by using two general half-duplex relay in the method, so that a full-duplex self-interference phenomenon is avoided.
Owner:ZHEJIANG WANLI UNIV
Orthogonal frequency division multiple access system and method for wireless relay communication
InactiveCN102325121AEnsure normal communicationSimple structureMulti-frequency code systemsWireless transceiverCommunications system
The invention relates to an orthogonal frequency division multiple access system and an orthogonal frequency division multiple access method for wireless relay communication. The system provided by the invention comprises a base station (BS), a relay station (RS) and a user terminal. The method mainly comprises the following steps of: setting a downlink relay zone and an uplink relay zone in a time division multiplexing (TDM) way in a downlink sub-frame and an uplink sub-frame of a physical layer frame structure of the BS respectively, setting a downlink relay zone in an uplink sub-frame of a physical layer frame structure of a frequency division duplexing (FDD) wireless receiver of the RS to define a relay sub-channel and orthogonal frequency division multiple access (OFDMA) symbol combinations for the reception of the RS from the downlink relay zone of the BS, and setting an uplink relay zone in a downlink sub-frame of a physical layer frame structure of an FDD wireless transmitter of the RS to define a relay sub-channel and OFDMA symbol combinations for the reception of the RS from the uplink relay zone of the BS; and performing the wireless relay communication among the BS, the RS and the user terminal in an FDD way based on the set uplink and downlink physical layer frames of the BS and the RS. By the system and the method, the single-FDD-wireless-transceiver-based relay communication of the RS can be realized in a communication system, the relay communication among the RS, the BS and the user terminal can be effectively ensured, and kinds of possible interference can be effectively avoided.
Owner:HUAWEI TECH CO LTD
Relays in telecommunications networks
ActiveUS8428607B2Avoid self-interferenceIncrease probabilityTransmission path divisionNetwork topologiesTelecommunications linkTelecommunications network
In a telecommunications network including a plurality of mobile terminals in communication with a network base station, and a plurality of relay nodes configured to assist the base station with data transmissions between the base station and one or more of said plurality of mobile terminals, a method of enabling communication resource reuse amongst the plurality of said relay nodes, the method comprising: predefining a plurality of communication resource sets, each resource set comprising one or more communication resource elements, the communication resource sets arranged so that each relay node can receive data in a predefined receiving resource set and transmit data in a predefined transmission resource set; determining which of two or more relay nodes are spatially separated from one another; and configuring at least two of the two or more spatially separated relay nodes to use the same communication resource sets.
Owner:VODAFONE IP LICENSING
Class II relay station and sending method of descending control information thereof
InactiveCN102035593AIntegrity guaranteedAvoid self-interferenceAssess restrictionRadio transmission for post communicationSelf interferenceData information
The invention discloses a class II relay station and a sending method of descending control information thereof. When the descending Backhaul subframe control field of the class II relay station is configurated as a guard space, the corresponding descending control information of the descending Backhaul subframe data field is configurated by the class II relay station at any descending Backhaul subframe or descending Backhaul subframe data field designated by the base station to be sent, self-interference caused by radio frequency conversion is avoided, the integrity of the control information and data information transmission of the class II relay station descending backhaul subframe is ensured, and the system efficiency is improved.
Owner:ZTE CORP
An access system and method for orthogonal frequency division multiplexing of wireless transfer communication
InactiveCN1964221AEnsure normal communicationSimple structureActive radio relay systemsRadio transmission for post communicationAccess methodCommunications system
The related wireless transfer OFDM access method comprises: in down and up subframe of BS physical layer frame structure, employing TDM-TDM way to set down and up transfer areas; setting down / up transfer area on up / down subframe of physical layer frame structure of RSS FDD wireless receiver to define the transfer sub-channel of down / up transfer area and OFDMA label combination; among BS, RS and UE, using the said set BS and up-down physical layer frame of RS for wireless transfer communication by FDD way. This invention can ensure the transfer communication without interface.
Owner:HUAWEI TECH CO LTD
Resource allocation method and device
ActiveCN109803351AAvoid self-interferenceAssess restrictionConnection managementResource assignmentInterference (communication)
Disclosed are a resource allocation method and device, which relate to the technical field of communications, and can avoid the problem of UE self-interference when a UE accesses a first base stationand a second base station at the same time. According to the specific scheme, a first base station receives first information sent by a second base station; Wherein the first information comprises theidentification information of the UE, the identification information of the first serving cell of the UE and the service frequency of the first serving cell, and the second base station is the serving base station of the first serving cell; And if the first base station determines that the UE self-interferes according to the first information, sending notification information to the second base station, the notification information being used for negotiating with the second base station to distribute different resources to the UE.
Owner:VIVO MOBILE COMM CO LTD
Communication Section Setting Method, Relay Station And Mobile Communication System
InactiveCN102812738AAvoid self interferenceNetwork topologiesActive radio relay systemsData transmissionHandover
Provided is a mobile communication system wherein a mobile relay station sets a common restricted communication period to mobile stations (UE) under control of the mobile relay station (RN) during a period from the detection of a handover till the application of a new backhaul connected to a base station that is a destination of the handover. For example, during a restricted communication period, such as Measurement gap, the mobile stations under control of the mobile relay station do not perform data transmissions / receptions, so that a back-haul can be set during the Measurement gap.
Owner:FUJITSU LTD
Target detection method and system and computer readable storage medium
PendingCN113484927AAvoid self-interferenceImprove accuracyDetection of traffic movementOptical detectionEngineeringComputer science
The invention provides a target detection method which is applied to a target detection system, wherein the target detection system comprises first equipment and second equipment, wherein the first equipment comprises a first signal receiving device and a first signal transmitting device, the second equipment comprises a second signal receiving device and a second signal transmitting device. The method comprises the following steps of: in a first time period, the first signal transmitting device transmits a first signal, the second signal receiving device is used for receiving the first signal, the first signal receiving device stops receiving the signal, and the second signal transmitting device stops transmitting the signal; in a second time period, the second signal transmitting device transmits a second signal, the first signal receiving device is used for receiving the second signal, the second signal receiving device stops receiving the signal, and the first signal transmitting device stops transmitting the signal; and according to a detection result in the first time period and a detection result in the second time period, whether a detection target passes is determined. According to the method provided by the invention, signal self-interference can be avoided.
Owner:深圳市如晖科技有限公司
Orthogonal frequency division multiple access system and method for wireless relay communication
InactiveCN102325121BEnsure normal communicationSimple structureMulti-frequency code systemsWireless transceiverCommunications system
Owner:HUAWEI TECH CO LTD
Methods used in radio nodes and associated radio nodes
ActiveCN107534946BAvoid self-interferenceReduce operational complexitySynchronisation arrangementDownlink transmissionReal-time computing
Owner:TELEFON AB LM ERICSSON (PUBL)
Radio forwarding communication system and method
ActiveCN101034931BImprove throughputImprove defectsRadio transmissionMulti-frequency code systemsCommunication interfaceWireless transceiver
Owner:XFUSION DIGITAL TECH CO LTD
A kind of packaging film processing technology
ActiveCN107591081BSolve the problem of tear-proneHigh quality processingStampsIdentification meansPunchingRepulsion force
The invention discloses a processing technology of a packaging film. The processing technology comprises the steps that step 1, film attachment: the film is attached to a conveyor belt body and movesforward along with the belt body; step 2, punching: when the film passes through a drive unit, a spiral coil in an upper drive unit is connected with power and forms an electromagnet together with aniron core, a repulsion force driving a flying cutter to move downward is produced, the flying cutter passes through a through hole of the film and the conveyor belt body at high speed under the actionof the repulsion force and own gravity, adhesive film processing is completed, the flying cutter enters into a lower drive unit, at this time the spiral coil of the drive unit is connected with power, the repulsion force driving the flying cutter to move upward is produced, the flying cutter overcomes its own gravity to move upward at high speed passing through the through hole and film of the conveyor belt, and another adhesive film processing is completed; step 3, steps 1-2 are repeated, until the adhesive film processing is completed. The processing technology of the packaging film is convenient and practical.
Owner:CHONGQING SAN CHUANG PRINTING CO LTD
Wireless communication method and device
ActiveCN110710312BAvoid interferenceAvoid self-interferenceConnection managementTransmission path multiple useCommunications systemInterference (communication)
Embodiments of the present application provide a wireless communication method and device, which can avoid self-interference of terminal devices as much as possible, and improve performance of a communication system. The method includes: the terminal device determines that the first signal and the second signal cause self-interference or have the possibility of self-interference to the terminal device, wherein the first signal is used between the terminal device and the first network device The signal transmitted by the first carrier, the second signal is a signal transmitted between the terminal device and the second network device by using the second carrier; the terminal device sends the first information to the first network device, and the The first information is used to indicate that the first signal and the second signal cause self-interference to the terminal device or have the possibility of self-interference, and indicate that the terminal device and the second network device use A situation where the second carrier performs signal transmission.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
A control method for full-duplex transmission, user equipment, and base station
ActiveCN107113156BImprove system gainAccurate powerPower managementPayload allocationUplink transmissionUser equipment
A full-duplex transmission control method, user equipment and base station. Wherein, a full-duplex transmission control method includes: the user equipment obtains a first time resource unit; if the first time resource unit is obtained from the first time resource unit and includes scheduling authorization information indicating full-duplex transmission, the user equipment according to The power offset obtained by the user equipment corrects the first uplink transmission power used for half-duplex transmission to obtain the second uplink transmission power used for the full-duplex transmission; the user equipment according to the first uplink transmission power Two uplink transmission power to transmit an uplink signal on the first time resource unit or the second time resource unit, where the second time resource unit is a time resource unit after the first time resource unit in time.
Owner:HUAWEI TECH CO LTD
Terminal scheduling method, network device and terminal device
ActiveCN110022616BAvoid self-interferenceWireless communicationUplink transmissionTerminal equipment
Embodiments of the present invention provide a terminal scheduling method, network equipment, and terminal equipment, wherein the scheduling method includes: sending scheduling information to the terminal, where the scheduling information is used to enable the terminal to time-divide between at least two frequency bands where interference occurs. way to send data. The scheme of the present invention performs uplink transmission on two frequency bands by means of time division, so as to avoid the problem of self-interference at the terminal.
Owner:CHINA MOBILE COMM LTD RES INST +1
A second type of relay station and its method for sending downlink control information
InactiveCN102035593BIntegrity guaranteedAvoid self-interferenceAssess restrictionRadio transmission for post communicationData informationGuard interval
A method for transmitting downlink control information is provided in the present invention. The method includes that: while a control area of a downlink Backhaul sub-frame of a type?relay station is configured as a guard interval, downlink control information corresponding to a data area of the downlink Backhaul sub-frame is configured in any other downlink Backhaul sub-frame designated by a base station or configured in the data area of the downlink Backhaul sub-frame to be transmitted. An equipment for transmitting downlink control information is also provided in the present invention. The device includes: a configuration module(1), which is used to, while a control area of a downlink Backhaul sub-frame of a type?relay station is configured as a guard interval, configure downlink control information corresponding to a data area of the downlink Backhaul sub-frame in any other downlink Backhaul sub-frame designated by a base station; a transmission module(2), which is used to transmit the downlink control information corresponding to the data area of the downlink Backhaul sub-frame. The present invention ensures the integrality of the control information and data information transmission, and enhances the processing efficiency of a system.
Owner:ZTE CORP
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