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6302 results about "Multi path" patented technology
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Wireless transmission using an adaptive transmit antenna array
ActiveUS20050117660A1Spatial transmit diversityBroadcast transmission systemsWireless transmissionClosed loop
Closed loop wireless communication of signals using an adaptive transmit antenna array (3), in which a plurality of copies of signals to be transmitted by the transmit antenna array (3) are produced with delays and weights (wnj) that are functions of the multi-path transmission channel characteristics (H) from the transmit antenna array (3) to a receive antenna array (4) of a receiver (2) and are combined before transmission by the transmit antenna array. The delays and weights (wnj) of the transmit copies for each transmit antenna element are functions of the respective multi-path transmission channel characteristics (hn,m=1l=1,… ,hn,m=Ml=L)from that transmit antenna element to the receive antenna array (4) ssuch that the multi-path signal components propagated to each receiver element are received with distinguishable delays according to the propagation path. The receiver (2) combines the received signal components from each receive antenna element with delays and weights (u) that are respective functions of the multi-path transmission channels. Preferably, the receiver comprises a multi-finger RAKE receiver (6) that copies the received signals from the receive antenna array with delays and weights (u) that are respective functions of the multi-path transmission channels and combines the copied received signals.
Owner:GOOGLE TECH HLDG LLC
Systems and methods of beamforming in radio frequency identification applications
InactiveUS7652577B1Increased read rangeImprove reliabilitySensing record carriersBurglar alarm by hand-portable articles removalDistributed structureEngineering
Systems and methods for beamforming in radio frequency identification (RFID) applications are disclosed. A beamforming system uses a distributed architecture and techniques for antenna beamforming using a feedback control loop to direct radio frequency (RF) energy onto a specific region, referred to as an interrogation zone, which includes a calibration node where one or more RFID tags may be located. The distributed architecture of the beamforming system is resistant to fading and shadowing effects, providing accurate RFID reader operation even in environments with multi-path reflections or environmental changes, such as people moving around or changes in the location of equipment.
Owner:WIRAMA CORP +1
Digital broadcast transmitting and receiving system having an improved receiving performance and signal processing method thereof
ActiveUS20050249301A1Improve reception performanceModulation with suppressed carrierCode conversionData streamEqualization
A digital broadcast transmitting and receiving system and a signal processing method thereof that improves the receiving performance of the system. A digital broadcast transmitter can include a randomizer to receive and randomize a data stream into a specified position of which stuff bytes are inserted, a stuff-byte exchange unit to generate known data having a predefined pattern and insert the known data into the specified position of the data stream into which the stuff bytes are inserted, an encoder to encode the data stream output from the stuff-byte exchange unit for an error correction, and a modulator and RF converter to modulate the encoded data stream, RF-convert the modulated data stream and transmit the RF-converted data. The digital broadcast receiving performance can be improved even in an inferior multi-path channel by detecting the known data from the received transmission and using the known data for synchronization and equalization in a digital broadcast receiver.
Owner:SAMSUNG ELECTRONICS CO LTD
Multi-path mitigation in rangefinding and tracking objects using reduced attenuation RF technology
ActiveUS20110111751A1Small incremental costImprove accuracyMulti-channel direction-finding systems using radio wavesDigital computer detailsDigital signal processingSignal element
A method and system for identification, tracking and locating in wireless communications and wireless networks. The method and system use reference and / or pilot signals that are present in wireless communications and wireless networks. The method and system might also use RTT, TOA and time-stamping measurements / techniques to determine one or more reference signals traveling time between the Base Station (eNB) or its functional equivalent and mobile device (UE) and or network device. Other wireless networks that do not use reference and / or pilot signals may employ one or more of the following types of alternate embodiments of present invention: 1) where a portion of frame is dedicated to the ranging signal / ranging signal elements; 2) where the ranging signal elements are embedded into (spread across) transmit / receive signals frame(s); and 3) where the ranging signal elements are embedded with the data. The method and system includes multi-path mitigations processor and multi-path mitigations techniques and algorithms which improve the track-locate accuracy. The method and system allow achieving increased accuracy by using multi-path mitigations processor and multi-path mitigations techniques and algorithms. The techniques of Digital Signal Processing and Software-Defined Radio are used.
Owner:QUALCOMM TECHNOLOGIES INC
System for Providing Multi-path Input/Output in a Clustered Data Storage Network
ActiveUS20060277383A1Avoid problemsImprove performanceDigital computer detailsTransmissionClustered dataStorage area network
A distributed network storage system provides capability to send and receive storage information from multiple network storage servers in a storage area network using iSCSI commands. A storage server system comprising at least two data storage servers stores one or more logical volumes of data. A host computer receives a storage command from a host application, and determines one or more data storage servers has information to complete the storage command. The host computer generates one or more iSCSI network commands to carry out the storage command, and transmits the iSCSI network commands directly to each data storage server having necessary information. The storage servers receive iSCSI network commands, and return a response to the host. The host and storage servers verify the configuration of the storage network and are capable of correcting or updating the configuration as required.
Owner:HEWLETT-PACKARD ENTERPRISE DEV LP
Network nodes cooperatively routing traffic flow amongst wired and wireless networks
InactiveUS20110110309A1Wireless commuication servicesData switching networksWireless mesh networkNetwork conditions
End-point devices, access points and other types of network nodes each employ multi-path management software to manage communication via multiple possible paths to the Internet backbone from communication applications that run on an end-point device. The multi-path management software on an end-point device may operate independently and / or cooperate with the local communication applications and the multi-path management software located on the access points or other network nodes to select one or more pathways for the local communication applications. The multi-path management software depending on data types and data requirements also supports selection and maintenance of two or more paths that simultaneously serve a single communication application. The multi-path management software of an end-point device may pass all or a portion of multi-path management responsibility to a local communication application and / or to multi-path management software of another network node. In addition to managing the selection of one or more pathways, the multi-path management software seamlessly switches pathways as may become necessary to meet changing network conditions or bandwidth demands.
Owner:AVAGO TECH WIRELESS IP SINGAPORE PTE
Distributed base station, communication system, and signal transmission method thereof
ActiveUS20070093273A1Reduce distractionsIncrease system capacitySite diversityMultiplex communicationCommunications systemWeight coefficient
The present invention discloses a distributed base station serving mobile stations, which comprises multiple antenna-RF processing units and a central processing unit remotely connected with said multiple antenna-RF processing units. Each of the antenna-RF processing units has an antenna array formed by multiple antennas. Said central processing unit comprises: an MIMO coding unit for MIMO coding of data of each of the mobile stations so that data of each of the mobile stations generates multi-path data symbols; a beam-forming unit for multiplying each path data symbol of the multi-path data symbols of each of the mobile stations by a weighted coefficient vector corresponding to this path data symbol, to obtain beam-forming data of each path data symbol of each of the mobile stations; and an overlapping unit for, with respect to each antenna in said antenna-RF processing units, overlapping beam-forming data of the respective mobile stations for this antenna and feeding the overlapped beam-forming data to this antenna for transmission. The present invention further discloses a communication system having the above distributed base station and the corresponding signal transmission method.
Owner:ALCATEL LUCENT SAS
Apparatus and method of data transmission and reception using multi-path
Provided are a method and apparatus for transmitting / receiving data by using a multi-path. The multi-path is established between two transceivers, data is transmitted via each path at a predetermined time, a data receipt acknowledge control signal ACK of each path is received, and a path by which the data receipt acknowledge control signal ACK is not received is determined. Therefore, the path by which the data receipt acknowledge control signal ACK is not received is not used any further but data is transmitted via a path by which the data is previously transmitted, so that the data can be transmitted even if a line of sight (LOS) of the two transceivers comprising a directional antenna is blocked by a person or an obstacle.
Owner:ELECTRONICS & TELECOMM RES INST
Method and apparatus for position sensing
InactiveUS20060166681A1Direction finders using radio wavesTransmission control/equalisingData signalCombined use
Embodiments of the present invention include one or more wireless transmitting devices and an array of receiver units for receiving wireless communications from the transmitting devices. The transmitter devices and receiver units can be arranged in one, two or three dimensional configurations. Signals are transmitted from the devices for identification and accurate location determination. Spread spectrum techniques can be used, such as DSSS, FHSS, THSS, and pseudo-noise (PN) coding schemes, or combinations thereof. The transmitting devices can generate one or a plurality of data signals that are orthogonal-code modulated, to be decoded by the receiver units and a processor associated therewith. A plurality of transmitter signals can be received, identified, located, and data demodulated substantially simultaneously using embodiments of the invention. The combined use of array processing methods and diversity schemes can be used to reduce the effects of signal multi-path and occlusion.
Owner:XYZ INTERACTIVE TECH
Spatio-temporal processing for communication
InactiveUS6888899B2Reduce complexityEfficiency benefitError prevention/detection by using return channelSpatial transmit diversityTransmitter antennaHandling system
A space-time signal processing system with advantageously reduced complexity. The system may take advantage of multiple transmitter antenna elements and / or multiple receiver antenna element or multiple polarizations of a single transmitter antenna element and / or single receiver antenna element. The system is not restricted to wireless contexts and may exploit any channel having multiple inputs or multiple outputs and certain other characteristics. Multi-path effects in a transmission medium cause a multiplicative increase in capacity.
Owner:CISCO TECH INC
Multi-path communication of electronic device secure element data for online payments
Systems, methods, and computer-readable media for communicating electronic device secure element data over multiple paths for online payments are provided. In one example embodiment, a method includes, inter alia, at a commercial entity subsystem, receiving, from an electronic device, device transaction data that includes credential data indicative of a payment credential on the electronic device for funding a transaction with a merchant subsystem, accessing a transaction identifier, deriving a transaction key based on transaction key data that includes the accessed transaction identifier, transmitting, to one of the merchant subsystem and the electronic device, merchant payment data that includes a first portion of the credential data and the accessed transaction identifier, and sharing, with a financial institution subsystem using the transaction key, commercial payment data that includes a second portion of the credential data that is different than the first portion of the credential data. Additional embodiments are also provided.
Owner:APPLE INC
Method for implementing virtual network and virtual network
ActiveCN102857416ALoad balancingEfficient use ofHybrid transportNetworks interconnectionTraffic capacityMulti path
The embodiment of the invention provides a method for implementing a virtual network and the virtual network. The method comprises the following g steps: step (1), obtaining a transfer type, a source and a destination of a data packet sent by a host computer by a controller of the virtual network; step (2), formulating a forwarding strategy according to the transfer type, a port identifier of the source and a target identifier of the destination; and step (3), sending the forwarding strategy to each virtual access exchanger and each middle exchanger through which the data packet is to be passed, and executing the forwarding strategy to the received data packet received by the virtual access exchanger and the middle exchanger. In the forwarding process of the data packet, the controller can obtain various attributes of the data packet as target identifiers, formulate the forwarding strategy according to the target identifiers and forward the data packet more intensively and flexibly; and multi-user and multi-path forwarding is supported, flow load is balanced, and network resources are utilized more efficiently.
Owner:ZTE CORP
Multi-path communication of electronic device secure element data for online payments
ActiveUS20170011395A1Improve risk assessmentKey distribution for secure communicationCryptography processingTransaction dataFinancial transaction
Systems, methods, and computer-readable media for communicating electronic device secure element data over multiple paths for online payments are provided. In one example embodiment, a method includes, inter alia, at a commercial entity subsystem, receiving, from an electronic device, device transaction data that includes credential data indicative of a payment credential on the electronic device for funding a transaction with a merchant subsystem, accessing a transaction identifier, deriving a transaction key based on transaction key data that includes the accessed transaction identifier, transmitting, to one of the merchant subsystem and the electronic device, merchant payment data that includes a first portion of the credential data and the accessed transaction identifier, and sharing, with a financial institution subsystem using the transaction key, commercial payment data that includes a second portion of the credential data that is different than the first portion of the credential data. Additional embodiments are also provided.
Owner:APPLE INC
System and method for adaptive multi-cultural searching and matching of personal names
InactiveUS6963871B1Desired level of precisionDesired level of recallData processing applicationsDigital data processing detailsElement analysisApplication software
An automated name searching system incorporates an automatic name classifier and a multi-path architecture in which different algorithms are applied based on cultural identity of the query name. The name classifier operates with a preemptive list, analysis of morphological elements, length, and linguistic rules. A name regularizer produces a character based computational representation of the name. A pronunciation equivalent representation such as an IPA language representation, and language specific rules to generate name searching keys, are used in a first pass to eliminate database entries which are obviously not matches for the query name. The methods can also be implemented as a callable set of library routines including an intelligent preprocessor and a name evaluator that produces a score comparing a query name and database name, based on a variety of user-adjustable parameters. The user-controlled parameters permit tuning of the search methodologies for specific custom applications.
Owner:IBM CORP
Digital broadcast transmitting/receiving system having an improved receiving performance and signal processing method thereof
ActiveUS20050162886A1Improve reception performanceMultiple-port networksError preventionData streamMultiplexer
A digital broadcast transmitting / receiving system and a signal processing method thereof that can improve the receiving performance of the system. A digital broadcast transmitter has a randomizer to randomize an input data stream which has null bytes being inserted at a specified position, a multiplexer to output a data stream formed by inserting specified known data into the position of the null bytes of the randomized data stream, an encoder to encode the data stream outputted from the multiplexer, and a modulator / RF-converter to modulate the encoded data, RF-convert the modulated data and transmit the RF-converted data. The receiving performance of the digital broadcast transmitting / receiving system can be improved even in a multi-path channel by detecting the known data from the received signal and using the known data in synchronization and equalization in a digital broadcast receiver.
Owner:SAMSUNG ELECTRONICS CO LTD
Method to support user location in in-structure coverage systems
ActiveUS20090191891A1Beacon systemsRadio/inductive link selection arrangementsTransceiverMobile station
In an example embodiment of the present invention, the method includes creating a plurality of data packets. Each data packet in the plurality of data packets includes a plurality of coded cellular signals. The plurality of data packets are sent over a data network associated with at least one sector served by a plurality of transceivers, and at least one of the plurality of transceivers broadcasts the data packets. A location of a mobile station is determined based on received multi-paths associated with response from the mobile station to broadcast of at least one of the plurality of data packets.
Owner:LG ELECTRONICS INC +1
Fault-tolerant routing scheme for a multi-path interconnection fabric in a storage network
InactiveUS20030023893A1Error detection/correctionData switching networksStorage area networkInterconnection
Embodiments of a routing system are disclosed, including a method for routing a plurality of communications in a storage system. The storage system may include a plurality of nodes interconnected by an interconnection fabric that provides multiple independent paths between each source node and each destination node. Some nodes may be connected to one or more disk drives. The method may include receiving a communication to be sent from a source node to a destination node, selecting a communication path from the multiple independent paths between the source and destination nodes, and sending the communication on the selected communication path. This process may be repeated so that multiple communications may be sent. Each communication path is systematically selected at least occasionally to send at least one of the communications to prevent any path from having undetected problems.
Owner:ORACLE INT CORP
Apparatus and method for setting multi-path
ActiveUS7961710B2Reducing and cancelling interferenceEfficient data transferInterconnection arrangementsNetwork topologiesSelf-organizing networkMulti path
Owner:SAMSUNG ELECTRONICS CO LTD +1
Endoscopic tutorial system for urology
InactiveUS6939138B2Simulation is accurateEducational models3D-image renderingComplete resolutionDynamic contrast
A method and a system for simulating the minimally invasive medical procedure of urological endoscopy. The system is designed to simulate the actual medical procedure of urological endoscopy as closely as possible by providing botha simulated medical instrument, and tactile and visual feedback as the simulated procedure is performed on the simulated patient. Particularly preferred features include a multi-path solution for virtual navigation in a complex anatomy, the simulation of the effect of the beating heart on the urethra as it crosses the illiac vessel, and the simulated operation of a guidewire within the urethra In addition, the system and method optionally and more preferably incorporate the effect of dynamic contrast injection of dye into the urethra for fluoroscopy. The injection of such dye, and the subsequent visualization of the urological organ system in the presence of the endoscope, must be accurately simulated in terms of accurate visual feedback. Thus, the system and method provide a complete solution to the complex and difficult problem of training students in urological endoscopy procedures.
Owner:SIMBIONIX
Digital Broadcasting Transission/Reception System Capable of Improving Receiving and Equalizing Performance and Signal Processing Method Thereof
ActiveUS20070253502A1Improve reception performanceImprove uniformityTransmission control/equalisingTime-division multiplexData streamData filling
A digital broadcast transmitting and receiving system and a signal processing method thereof that improves the receiving performance of the system. A digital broadcast transmitter includes a randomizer to receive and randomize a data stream into a specified position of which stuff bytes are inserted, a replacement sequence generator to generate known data including a predefined sequence, a stuff-byte exchange unit to insert the known data into the specified position of the data stream into which stuff bytes are inserted, an encoder to encode the data stream output from the stuff-byte exchange unit for an error correction, and a transmission unit to modulate the encoded data stream, RF-convert the modulated data stream and transmit the RF-converted data. The digital broadcast receiving performance is improved even in an inferior multi-path channel by detecting the known data from the received transmission and using the known data for synchronization and equalization in a digital broadcast receiver.
Owner:SAMSUNG ELECTRONICS CO LTD
Convergence speed, lowering the excess noise and power consumption of equalizers
An equalizer for equalizing channel multi-path distortion includes digital filters. To improve the convergence speed and tracking ability of the equalizer while lowering noise and power consumption, the digital filters are divided into sections. Various parameters of the sections, such as step-size, shutdown and update rates can be controlled. Control of the various parameters can be realized either in software on an embedded or external processor or by dedicated hardware.
Owner:CONEXANT SYST INC
Scalable, reconfigurable routers
ActiveUS7330468B1Rapid bi-directional reconfigurability/interchangeabilityLow costData switching by path configurationSpecial needsTime sensitive
A multi-path router includes an interface module (IM) having a time-sensitive logical processing path and a non-time-sensitive logical processing path and a special needs logical processing path and a filter for receiving a packet header and determining the needs of the packet header and for selecting one of the time-sensitive logical processing path, the non-time sensitive logical processing path and the special needs logical processing path in response to the needs of the packet header. The multi-path router further includes a router special needs agent (RSNA), adapted to receive a packet header having special needs services. The multi-path router can be used in a network which includes first and second networks coupled to the multi-path router and wherein the RSNA receives information from the special needs logical processing path and provides information to the IM on a return path.
Owner:AMERICAN TELEPHONE & TELEGRAPH CO
Multiple input multiple output (MIMO) wireless communications system
ActiveUS7333455B1Minimize waterMinimize ground bounce nullPower managementModulated-carrier systemsPolarization diversityFrequency spectrum
A wireless broadband communications system that can transmit signals over communications links with multiple modes of diversity, thereby allowing signals having very low correlation to propagate over the link along multiple orthogonal paths. The system can be implemented as a non-line-of-sight (NLOS) system or a line-of-sight (LOS) system. The NLOS system employs orthogonal frequency division modulation (OFDM) waveforms to reduce multi-path interference and frequency selective fading, adaptive modulation to assure high data rates in the presence of channel variability, and spectrum management to achieve increased data throughput and link availability. The LOS system employs space-time coding and spatial and polarization diversity to minimize ground bounce nulls. The system achieves levels of link availability, data throughput, and system performance that have heretofore been unattainable in wireless broadband communications systems.
Owner:MOTOROLA SOLUTIONS INC
H.264 based multichannel video transcoding multiplexing method and multiplexer
InactiveCN101068366APulse modulation television signal transmissionDigital video signal modificationMultiplexingMultiplexer
An escape-code complexing method based on H.264 multi-path video includes applying fast conversion means of MPEG-2 to H.264 code and utilizing H.264 macro-block mode to select relativity to MPEG-2 motion compensation residual error as well as utilizing motion compensation residual error and MB mode as well as mapped H.264 macro-block mode obtained by MPEG-2 decoding to synthesize TS stream and to input multi-path MPEG-2 program stream to escape code complex server by SI interface through PCI bus and outputting escape-coded and complexed single H.264 video stream through PCI bus in ASI interface mode.
Owner:NANJING UNIV
Ultra-wideband antenna array
InactiveUS7042417B2Improve signal-to-noise ratioIncreased signal noiseSpatial transmit diversityPolarisation/directional diversityUltra-widebandSignal-to-noise ratio (imaging)
An ultra-wideband (UWB) antenna array is provided. One embodiment of the present invention employs a multi-element antenna for UWB beam forming and also for time-of-arrival vector processing to resolve multi-path problems in an UWB communication system. Another embodiment of the present invention recovers the energy contained in the multi-path reflections to increase signal-to-noise ratios of received UWB pulses.
Owner:INTELLECTUAL VENTURES HLDG 73
System and method for multi-path simulation
InactiveUS20050059355A1Reduced strengthReliable resultsTransmission monitoringMobile antennasDirect path
The present invention provides a system and method for multi-path simulation that employs a shielded anechoic chamber to avoid external electromagnetic interference and other uncontrollable transmission paths during testing, and simulates a main indirect transmission path by a reflector within the chamber. An attenuating device is used to attenuate signals, thereby simulating the signal attenuation during transmission. The shielded anechoic chamber also includes a movable platform and a turntable, both controlled by a control unit, for carrying a dipole antenna and a wireless communication device to be tested respectively. The movable platform is used to shift the antenna, thereby simulating the phase shift between a direct path and a main indirect path of the system; the turntable is used to change the reception azimuth of the communication device, thereby measuring the performance of the device in various azimuth angles.
Owner:ACCTON TECHNOLOGY CORPORATION
Multi-path mitigation in rangefinding and tracking objects using reduced attenuation RF technology
ActiveUS7969311B2Small incremental costImprove accuracyMulti-channel direction-finding systems using radio wavesPosition fixationDigital signal processingSignal element
Owner:QUALCOMM TECHNOLOGIES INC
Methods and system for multi-path mitigation in tracking objects using reduced attenuation RF technology
ActiveUS7872583B1Small incremental costImprove accuracyPosition fixationDigital computer detailsDigital signal processingUltrasound attenuation
A method and system for a long range Radio Frequency (RF)-based identification, tracking and locating of objects. The method and system use a narrow bandwidth ranging signal(s), including VHF of lower frequency bands, which minimizes propagation loss and loss of accuracy of the RF locating signals. The method and system includes narrow bandwidth ranging signal multi-path mitigations processor, which further improves the track-locate accuracy. The signal is sent from a Master Unit(s) to a Tag. The signal traveling time is recorded and the distance between the Master(s) and the Tag is calculated. The method and system allow achieving a longer distance of the RF narrow bandwidth ranging signal penetration and an increased accuracy by using VHF bands in conjunction with the narrow bandwidth ranging signal multi-path mitigations processor. The techniques of Digital Signal Processing and Software-Defined Radio are used. The actual waveforms transmitted and received by the radios are defined by the software. The roles of the Master Unit(s) and the Tag can be reversed.
Owner:QUALCOMM TECHNOLOGIES INC
Testing apparatus and method for a multi-paths simulating system
InactiveUS20070243826A1Easy to controlLess processing timeTransmission monitoringUltrasound attenuationElectromagnetic interference
An innovative testing apparatus and method for a multi-paths simulating system is proposed. The testing apparatus comprises a shielded chamber to avoid the external electromagnetic interference and other unexpected transmission paths. The multi-paths simulating system is utilized by attenuators for simulating a communication effects in a MIMO channel propagation environment. A control unit can set of MIMO and SISO modes of TD, RD and DUT to determine attenuation difference and downlink, uplink throughputs difference of the TD, RD and DUT.
Owner:ACCTON TECHNOLOGY CORPORATION
Multi-path id routing in a pcie express fabric environment
InactiveUS20140237156A1Internal/peripheral component protectionTransmissionPathPingPoint-to-Point Protocol
PCIe is a point-to-point protocol. A PCIe switch fabric has multi-path routing supported by adding an ID routing prefix to a packet entering the switch fabric. The routing is converted within the switch fabric from address routing to ID routing, where the ID is within a Global Space of the switch fabric. Rules are provided to select optimum routes for packets within the switch fabric, including rules for ordered traffic, unordered traffic, and for utilizing congestion feedback. In one implementation a destination lookup table is used to define the ID routing prefix for an incoming packet. The ID routing prefix may be removed at a destination host port of the switch fabric.
Owner:AVAGO TECH WIRELESS IP SINGAPORE PTE
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