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764results about How to "Improve data transfer rate" patented technology

Apparatus and method for transmitting/receiving data in a mobile communication system using multiple antennas

An apparatus and method for transmitting / receiving data in a mobile communication system using multiple antennas are provided. A receiver estimates a fading channel of received data, selects a weight set relative to a maximum data transmission rate from at least one weight set with elements of a plurality of orthogonal weight vectors, and transmits feedback information including the selected weight set and channel-by-channel state information to a transmitter. The transmitter demultiplexes data to be transmitted on a basis of the feedback information into at least one sub-data stream, multiplies each sub-data stream by an associated weight, and transmits the data.
Owner:SAMSUNG ELECTRONICS CO LTD

Simultaneous forward link beam forming and learning method for mobile high rate data traffic

InactiveUS6330460B1Increase aggregate digital data packet throughputImprove data transfer ratePower managementSpatial transmit diversityHigh rateCommunications system
Disclosed is a base station of a wireless communications system including an adaptive antenna array and beam forming means for forming simultaneous multiple forward link beams. Preferably mobile stations are separated into groups of mobile stations corresponding to a maximum number of simultaneous forward link beams for determining which of said groups can be served by compatible simultaneous forward link beams. Preferably, if mobiles remain outside of a compatible group, the number of simultaneous forward link beams is increased and grouping of the mobile stations is repeated until all the mobile stations are included in compatible groups. Preferably simultaneous data beams are formed to mobiles of a said group during a time interval accorded to said group, such that every mobile station receives service data during a full cycle of said time intervals at a rate equal to or in excess of a target service data rate for that mobile.
Owner:F POSZAT HU

Flash memory device with ATA/ATAPI/SCSI or proprietary programming interface on PCI express

A storage device made of flash memory module(s) and a storage device controller and a PCI Express interface unit, is implemented to be compatible with (1) either ATA, ATAPI, SCSI or proprietary specification, and (2) PCI Express platform such as, with then, ExpressCard Standard or PCI Express Card Specification or PCI Express Mini Card Specification. The device includes memory module(s), which can accept data transfer and configuration and status report to / from non-volatile solid-state memory herein referred to as flash memory module(s). The storage device controller and the PCI Express interface unit work together to provide (A) PCI Express interface functionality and compatibility, and (B) ATA, ATAPI or SCSI or proprietary programming interface functionality and compatibility, alone with common flash memory operations such as programming reading, writing, erasing, and data transferring from / to PCI Express host platform.
Owner:V TECH CO LTD

Wideband analog quadrature modulator/demodulator with pre-compensation/post-compensation correction

The present invention is related to methods and apparatus that compensate for quadrature impairments of an analog quadrature modulator and / or demodulator over a relatively wide signal bandwidth. One embodiment pre-distorts baseband signals in a quadrature modulator compensation signal processor (QMCSP) to negate the quadrature impairment of an analog quadrature modulator and corrects a received baseband signal in a quadrature demodulator compensation signal processor (QDCSP) to cancel the quadrature impairment of an analog quadrature demodulator. The QMCSP and the QDCSP contain adaptive digital filter correction structures that pre-compensate and post-compensate, respectively, for the quadrature impairments introduced by the analog quadrature modulator and the analog quadrature demodulator over a relatively wide bandwidth. A phase shifter advantageously shifts the phase of a local oscillator signal to the analog quadrature demodulator to distinguish quadrature impairments introduced by the modulation path from quadrature impairments introduced by the demodulation path.
Owner:MAXLINEAR ASIA SINGAPORE PTE LTD

Method for radio communication in a wireless local area network and transceiving device

Method for radio communication in a wireless local area network and transceiving device refers to wireless local area networks (WLAN) consisting of a multitude of transceiving devices of users (14, 15, 16 . . . N). Simultaneous scanning by their antenna beams in different directions by the transceiving devices (with the transceiving devices being in reception mode) and transmission of an omnidirectional signal in the form of calibration signal and data package by one of the transceiving devices of the network (with the transceiving device being in transmission mode), reception of the signal by the transceiving devices operating in reception mode and subsequent orientation of their antenna beams in the direction of signal source. The recognition and orientation is performed during the period of reception of the calibration signal. The Method increases the range of a WLAN, reduces the transmission time and improves quality and reliability of communication. Each transceiving device (1) includes at least one directional antenna (3) featuring a controllable directional pattern, switched-over by unit (4), reception / transmission mode switch (5), receiver (8), transmitter (10) and controller (11). Additionally a unit for signal detection (13) is incorporated in the device.
Owner:AIRGAIN INC

Method for radio communication in a wireless local area network wireless local area network and transceiving device

The invention refers to wireless local area networks (WLAN) consisting of a multitude of transceivers capable of establishing communication with one another (i.e. operating in a peer-to-peer mode) under the control of network coordinator (the so-called “ad hoc” networks). Implies the assignment of the role of the temporary coordinator to a transceiver from among the plurality of transceivers, switching-over other transceivers into the mode of a network client, orientation of antenna beam of a transceiver (switched-over into the client mode) equipped with a direction-agile antenna in the direction of the temporary coordinator of the network and transmission of information to an addressee by a client-transceiver of this network that has got the permission to transmit from the temporary coordinator. A WLAN comprises a multitude of transceivers, one of which serves as a temporary coordinator for said network and at least two of which have a direction-agile antenna and means for the operation of said antenna in the omnidirectional mode, in the directional scanning mode or in the stationary directional mode, an identification means responsive to transmission of a signal, including the transmission of a synchronization signal or identification signal intended for orienting said antenna in the direction of said signal being transmitted. The invention improves the quality and reliability of communication for WLAN users (including mobile users) thus increasing the data transfer rate.
Owner:AIRGAIN INC

Magnetic device, magnetic recording head, and magnetic recording apparatus

A magnetic device includes a first magnetic layer having at least one magnetic material layer, a second magnetic layer having at least one magnetic material layer, a first nonmagnetic layer provided between the first magnetic layer and the second magnetic layer, a third magnetic layer including a ferromagnetic material with a fixed magnetization direction, and a pair of electrodes. The pair of electrodes are operable to pass a current through a laminated body including the first and second magnetic layers, the nonmagnetic layer, and the third magnetic layer.
Owner:KK TOSHIBA

Reducing shared downlink radio channel interference by transmitting to multiple mobiles using multiple antenna beams

A radio base station includes multiple antennas associated with a cell. Multiple mobile radios are selected to receive transmissions over a shared radio channel during a predetermined time interval. Information is transmitted over the shared radio channel to multiple mobile radios in the cell during the predetermined time interval using multiple antenna beams. As a result, interference from the transmission appears as white additive Gaussian noise in time and in space in the cell. A “flashlight effect” caused by a single beam transmission over the shared channel during a predetermined time interval that would normally detrimentally impact mobile channel quality detection is avoided. Other methods for avoiding the flashlight effect are described.
Owner:TELEFON AB LM ERICSSON (PUBL)

High-speed multi-channel communications transceiver with inter-channel interference filter

A communication system is disclosed that allows high data-rate transmission of data between components. N-bit parallel data is transmitted in K-frequency separated channels on the transmission medium so as to fully take advantage of the overall bandwidth of the transmission medium. Additionally, a cross-channel interference filter in a receiver section corrects for cross-channel interference in the communication system. As a result, a very high data-rate transmission can be accomplished with low data-bit transmission on individual channels. A transmitter system and a receiver system are described for the communication system.
Owner:ENTROPIC COMM INC

Subscriber station, network control means and method for carrying out inter-frequency measurements in a mobile communication system

In a mobile communication system (T1) a time interval selection means (TISM) in a network control means (RNC) determines a time interval and sends an indication about this time interval to a subscriber station (MS) in a time interval indication signal. A time interval signal determining means (TISDM) in the subscriber station (MS) detects the time interval and an IF measurement means (IFMM) carries out inter-frequency / inter-system measurements in the detected time interval specified by the network control means (RNC). In this time interval the temporary reduction of the quality of service QoS on the communication connection (CC) is planed by the network control means (RNC). However, independent as to whether a delay-sensitive or loss-sensitive data transmission is carried out, the network control means (RNC) can make provisions in order to compensate the temporary reduction of the quality of service. Such procedure is superior to performing IF measurements in an idle time interval of a compressed time slot in which a temporary degradation of the quality of service must always be accepted due to a compressed mode of operation.
Owner:LENOVO INNOVATIONS LTD HONG KONG

Multi-channel communications transceiver

A transceiver system according to the present invention transmits data utilizing the baseband and one or more frequency separated transmission bands. A baseband transmitter is combined with one or more transmitters that transmit data into one of the frequency separated transmission bands. A baseband receiver is combined with one or more receivers that receive data from the frequency separated transmission bands. Any combination of modulation systems can be utilized (e.g. PAM for the baseband and QAM for the frequency separated bands). A transceiver circuit or chip according to the present invention includes a transmitter and a receiver and communicates with a corresponding transceiver chip. In some embodiments, one baseband PAM transmitter is combined with one frequency separated QAM transmitter.
Owner:ENTROPIC COMM INC

Data storage device having selectable performance modes for use in dual powered portable devices

A portable computer includes a battery and a connection to an external power source, a two-speed data storage device being supplied power from one or more of the battery and the external power source, and a controller attached to the storage device. With the invention, when the storage device is powered by the internal battery, the controller not only reduces the rotation speed and the clock rate of the storage device, but also reduces the power consumption of the read / write electronics module inside the disk drive by lowering the power supply voltage for the write driver inside said module and lowering the tail currents for the amplifier stages in the readback amplifier inside said module. When the storage device is powered by an external power source, the controller will run the storage device at full speed and highest clock rate, and will provide the write driver inside the read / write electronics module with a power supply voltage high enough to accommodate the resulting higher data rate, and will provide tail currents in the amplifier stages of the readback amplifier high enough to accommodate the higher required bandwidth for the readback amplifier.
Owner:IBM CORP

Processing image data from multiple sources

Interleaving multiple logical data streams into one physical data stream reduces overhead required to process the multiple logical data streams. Multiple arrays of data values are interleaved into a combined array of data that simulates a frame of data for input to a data port such as a video port. Revised timing and synchronization signals are provided to permit transmission of the combined array according to video data port protocol. The processor includes instructions for locating the various arrays of data values within the combined array.
Owner:SYMBOL TECH LLC

Multiple-input multiple-output communication method and multiple-input multiple-output communication system of enabling the method

A Multiple-Input Multiple-Output (MIMO) communication system and method. The MIMO communication system includes: an antenna number determination unit to determine a number of active antennas among a plurality of transmitting antennas based on a power of a transmission signal wherein the number of active antennas is at least one and the at least one active antenna transmits the transmission signal; and a beam generator to generate the transmission signal corresponding to the number of active antennas by using channel information wherein the channel information is fed back from each of a plurality of user terminals.
Owner:SAMSUNG ELECTRONICS CO LTD +1

Data transmission method for machine type communication (MTC) and mtc apparatus

A data transmission method for Machine Type Communication (MTC) and a MTC apparatus are disclosed. The data transmission method for MTC includes: dividing each of a plurality of subframes configured with time resources and frequency resources into a first region for transmitting control information and a second region for transmitting data; and allocating resources for MTC to the second region of each subframe according to a predetermined hopping period and a predetermined hopping frequency interval. Accordingly, it is possible to increase the data transfer rate of a MTC apparatus.
Owner:LG ELECTRONICS INC +2

Spread spectrum communication apparatus

A searcher detecting signal indicating conditions of propagation paths is detected from incoming waves of a pilot signal transmitted at the highest electric power. In a RAKE reception for one code channel, an interference replica signal functioning as an interference signal for an incoming wave of the code channel to be demodulated in one finger unit is produced from reference signals produced in the other finger units and the searcher detecting signal, an interference removal is performed for a receiving signal according to the interference replica signal, and the demodulation of the RAKE reception is performed. In the demodulation based on a plural code channel, a reference signal is produced in one of the finger units, an interference replica signal is produced from the reference signal and the searcher detecting signal, an interference removal is performed for the receiving signal according to the interference replica signal, and the demodulation based on the plural code channel is performed. Accordingly, a service of a high speed data transmission can be performed without increasing an occupied band as well as a service mainly performing a low speed data transmission.
Owner:SONY CORP +1

Method and apparatus for processing multicast frame

A method of processing a multicast frame in a wireless local area network (WLAN) and an apparatus supporting the method are provided. The method comprises receiving, at a station, a unicast frame from an access point (AP), the unicast frame including an unicast address indicating a single station which receives the unicast frame, receiving a multicast frame from the AP, the multicast frame including a group address indicating a group of stations which receives the multicast frame, determining whether the unicast frame is duplicated with the multicast frame, and discarding the multicast frame if the unicast frame is duplicated with the multicast frame.
Owner:LG ELECTRONICS INC

Semiconductor memory device

For decreasing a recording current and suppressing a cross erase simultaneously, a three-dimensional phase-change memory for attaining higher sensitivity and higher reliability by the provision of a chalcogenide type interface layer is provided, in which an electric resistivity, a thermal conductivity, and a melting point of the material of the interface layer are selected appropriately, thereby improving the current concentration to the phase-change material and thermal and material insulation property with Si channel upon writing.
Owner:HITACHI LTD

Seismic Data Acquisition System and Method for Downhole Use

A method and system for conducting a seismic survey by lowering a string of intelligent clampable sensor pods with 3-C sensors into a borehole. The string of pods is serially interconnected by a cable having a conductor pair which provides both power and data connectivity. The uppermost sensor pod is connected to a downhole telemetry and control module. The cables and pods use connectors to allow assembly, customization, repair, and disassembly on site. Each pod has an upper and a lower connector, a processor, and memory which is coupled to both the upper and the lower connectors. Each pod is capable of simultaneous and independent serial communications at each connector with the memory. The telemetry and control module is designed to query the pods to determine the system configuration. The telemetry and control module then simultaneously triggers all pods to acquire data, the pods storing the collected data locally in the memory. After data collection, the controller simultaneously signals the pods to immediately transfer data serially from the local memory to the next higher adjacent pod and receive data, if any, from the lower adjacent pod, if any, storing the received data in memory. The first data transferred from each pod is that data collected by its local sensors. Subsequent data originates from lower pods and is simply passed up the string of pods to the telemetry and control module. In other words, the pods communicate in a bucket brigade fashion.
Owner:SENSORWISE

Method for the continuous real time tracking of the position of at least one mobile object as well as an associated device

In a method for the continuous real time tracking of the position of at least one mobile object in a defined multidimensional space, at least one mobile transmitter module is attached to at least one mobile object and the signals from the at least one module are received by a stationary receiving and signal processing network and then centrally processed. The signals emitted by each transmitter module are electromagnetic waves sent within a frequency band range using time division multiplexing techniques. Due to the fact that the frequency band is used as a single channel for the purpose of maximizing the accuracy with which a position is detected, and due also to the fact that the communication process between the transmitters and the receivers is based on the principle of pseudo-random time division multiplexing using burst transmissions of low cross correlation with non synchronized pseudo-random patterns, there is created a method for the continuous tracking of the position of one or more mobile objects at any time and in any place which is of very high positional resolution and has a temporal resolution of just a few milliseconds.
Owner:FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV

Method and system for autonomous tracking of a following vehicle in the lane of a leading vehicle

A method and system for autonomous tracking of a following vehicle on the track of a leading vehicle. A lead message is received by the following vehicle and rejected by the following vehicle or confirmed with a follow message. After receipt of the follow message, a first element of coordination information for coordination of the autonomous tracking is sent to the following vehicle by the leading vehicle. A second element of coordination information is detected for coordination of the autonomous tracking by environment sensors of the following vehicle on the basis of movements of the leading vehicle. The first and second elements of coordination information are compared by the following vehicle. In the case of a matching comparison result, the autonomous tracking is performed corresponding to the first and second elements of coordination information and, in the case of a deviating comparison result, the autonomous tracking is ended.
Owner:CONTINENTAL TEVES AG & CO OHG
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