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47 results about "Receiver diversity" patented technology
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Diversity Receiver. In wireless microphone applications, diversity receivers are often used to improve reception of RF signals. A diversity receiver utilizes two separate, independent antenna systems.
Redundant wireless node network with coordinated receiver diversity
InactiveUS20050201349A1Good flexibilityEasy to placeSpatial transmit diversityData switching by path configurationEngineeringDiversity scheme
A network of wireless nodes transmit electromagnetic signals, typically in the radio frequency (RF) mode, or at other frequencies. Multiple infrastructure nodes pick up the signals transmitted by each wireless node. The signals are combined to estimate the actual signal transmitted by the wireless node, such as a leaf node sensor. Many different diversity techniques may be used to combine the signals. In one embodiment, maximal ratio combining, equal gain combining, selection combining or switching combining is used to combine the signals.
Owner:HONEYWELL INT INC
Tunable antenna system with receiver diversity
ActiveCN102684722AAdd other featuresSimultaneous aerial operationsAntenna supports/mountingsDielectricDisplay device
A wireless electronic device (10) may include antenna structures (40U) and antenna tuning circuitry. The device (10) may include a display (14) mounted within a housing (12). A peripheral conductive member (16) may run around the edges of the display and housing. Dielectric-filled gaps (18C) may divide the peripheral conductive member (16) into individual segments (16-1, 16-2). A ground plane (G) may be formed within the housing. The ground plane (G) and the segments (16-1, 16-2) of the peripheral conductive member (16) may form antennas in upper and lower portions of the housing (12). The antenna tuning circuitry may include switchable inductor circuits (210') and variable capacitor circuits (212-1) for the upper and lower antennas. The switchable inductor circuits (210') associated with the upper antenna may be tuned to provide coverage in at least two high-band frequency ranges of interest, whereas the variable capacitor circuits (212-1) associated with the upper antenna may be tuned to provide coverage in at least two low-band frequency ranges of interest.
Owner:APPLE INC
Sensor-aided wireless combining
InactiveUS20100330940A1Spatial transmit diversityPolarisation/directional diversityDiversity schemeComputer science
An apparatus and method are disclosed for achieving receiver diversity. A wireless unit includes a plurality of antennas, an antenna selector to select one or more antennas from the plurality of antennas, a processor with input data from an inertial sensor for monitoring the orientation of the wireless unit. Based on the input data, the processor commands the antenna selector to select one or more antennas. In some embodiments, the processor is a diversity processor. Based on the input data from the inertial sensor, the diversity processor computes the combination of the received signals. In another aspect, the wireless unit further includes a baseband processor to process the output of the diversity processor for a particular unit application.
Owner:QUALCOMM INC
Technique for adaptive equalization in band-limited high data rate communication over fading dispersive channels
InactiveUS7590204B2Quality improvementEasy to adaptAmplitude-modulated carrier systemsDiversity/multi-antenna systemsDigital dataFrequency spectrum
In high data rate communication applications where digital data information is error-corrected coded and interleaved and transmitted with spectral limitations over fading dispersive channels, a method and receiver is described that incorporates channel estimation and decision-feedback equalization. Channel estimation is accomplished within a receiver time block with locally generated reference symbol sequences. The parameters of the decision-feedback equalizer (DFE) are computed directly from the channel estimates. The DFE is an optimum finite length realization that includes effects from spectrum control filtering, a space-time block coder (STBC) on multiple transmit antennas, multiple receiver diversity signals, and the fading dispersive channel. The DFE includes a matched filter, forward filter, backward filter, and detector. A symbol combiner within the matched filter produces a P+1 dimensional signal that provides ideal cancellation of P intersymbol interferers in the forward filter. When P is selected to meet an intersymbol interference (ISI) criterion, all desired signal energy is collected and all ISI can be ideally cancelled. The DFE processes received signals within the receiver time block to produce information symbol estimates that are subsequently deinterleaved and error-correction decoded to recover the transmitted digital data information. Deinterleaving over multiple receiver time blocks further compensates for channel estimation variations from block to block. Additionally the STBC and DFE are used in a quadruple angle diversity technique requiring only a single antenna at each terminal of a troposcatter link to provide performance approaching that of a nonfading satellite link.
Owner:MONSEN PETER
Token-based receiver diversity
A token-based receiver diversity processing is described. In one embodiment, a receiver diversity comprises repeaters receiving wirelessly transmitted packets from a mobile station, and one of the repeaters forwarding packets of the wirelessly transmitted packets to a switch if the one repeater is currently assigned to forward packets from the mobile station based on an indicator assigned prior to the wirelessly transmitted packets being sent.
Owner:AVAGO TECH INT SALES PTE LTD
Spread spectrum communication method and system using diversity correlation and multi-user detection
InactiveUS20080285631A1Ensures separabilityEnable optimizationSpatial transmit diversityPolarisation/directional diversityCommunications systemMulti user detection
A communication system transmits and receives a plurality of spread-spectrum signals having differences in at least one diversity parameter. The signals are highly correlated when their diversity parameters are similar, and the signals are uncorrelated when at least one diversity parameter is different Any combination of a transmitter, a receiver, and a communication channel may diversity-encode the signals to effect differences in their diversity parameters. A receiver diversity-decoder compensates for differences in a diversity-parameter of at least one received signal to make the signal highly correlated with at least one other received signal. A correlator combines at least two of the received signals to recover an embedded information signal. The communication system enables the use of true-noise signals for spreading information signals, provides simplified receiver designs, and enables antenna arrays to spatially process spread-spectrum signals.
Owner:LOT 41 ACQUISITION FOUND
Wireless Receiver with Receive Diversity
ActiveUS20090111542A1Raise the ratioGood correlationSpatial transmit diversitySubstation equipmentChannel parameterEngineering
Wireless receivers are described for receiving signals from a transmitter. A receiver can include a plurality of antennas each for receiving a version of a signal via a different propagation channel and providing that version to a respective input. Signal processing means can be included and configured to operate diversity processing of a supplied number of said inputs for use in performing detection of said signal. The receiver can include channel parameter estimation means, configured to estimate one or more channel parameters on the propagation channels. The receiver can also include selection means configured to select only a subset of said inputs to implement a specific dimensionality of the receiver diversity processing, in dependence on the one or more channel parameters indicative of channel conditions on said propagation channels. The diversity processing can be linear or non-linear. Related methods and software implementations and computer program products are also described.
Owner:ICERA INC
Narrowband OFDM (NOFDM) Transceiver for Powerline Communications (PLC)
ActiveUS20150162970A1Increase opportunitiesIncrease data rateSystems using filtering and bypassingSpatial transmit diversityTransceiverDiversity scheme
The present invention provides a narrowband OFDM (NOFDM) system with frequency diversity redundant transmission and receiver diversity selection and combining scheme. The communication channel is segmented into independent plurality of sub-channels. The sub-channels can be used in an aggregated mode to transmit different data on every sub-channel or in a number of redundant modes, where the same data is sent on multiple sub-channels to achieve maximum robustness of communication. Redundant modes may include channel selection diversity and / or weighted channel combining diversity.
Owner:SEMITECH SEMICON
Control method and apparatus for implementing receiver diversity on mobile terminal
InactiveCN101431820AGood RF working characteristicsAvoid wastingPower managementDiversity/multi-antenna systemsDiversity schemeRadio frequency
The invention discloses a control method and a device for achieving the aggregations on a mobile terminal. The method comprises: the terminal confirms the residing network and sends the connecting request to the residing network; the terminal receives the responding message from the residing network; the responding message is carried with the mobile network information of the residing network; the terminal obtains the frequency section information corresponding to the mobile network information according to the corresponding relation of the mobile network information and the frequency section information previously stored in the terminal; the terminal automatically starts up the receiving aggregations corresponding to the frequency section information. The technical solution of the invention avoids the waste of the mobile terminal resource via starting up the receiving aggregations function corresponding to the residing network and the invention provides a great radio frequency working characteristic.
Owner:ZTE CORP
Digital switching wireless receiver diversity and buffer diversity for enhanced reception in a wireless digital audio communication system
InactiveUS7236549B2Easy to receivePolarisation/directional diversityError prevention/detection by diversity receptionControl signalEngineering
Owner:FREESYST
Wireless receiver with receive diversity
A wireless receiver and corresponding method for receiving a signal transmitted by a transmitter. The receiver comprises: a plurality of antennas each for receiving a version of the signal via a different propagation channel and providing that version at a respective input, and signal processing means configured to operate diversity processing of a supplied number of the inputs for use in performing detection of the signal. The receiver further comprises: channel parameter estimation means configured to estimate one or more channel parameters on the propagation channels; and selection means configured to select only a subset of the inputs to implement a specific dimensionality of the receiver diversity processing, in dependence on the one or more channel parameters indicative of channel conditions on the propagation channels.
Owner:NVIDIA TECH UK
Control of receiver antenna diversity
Control of receiver antenna diversity is described in relation to apparatuses, user radio terminals, a method, and a computer program. The apparatus comprises an interface configured to obtain information on a power control procedure of a radio receiver and a processing unit configured to switch on / off a receiver antenna diversity branch of the radio receiver on the basis of a comparison between a predetermined condition and the information on the power control procedure.
Owner:NOKIA TECHNOLOGLES OY
Multi-antenna receive diversity control in wireless communications
Receiver diversity in a wireless device is controlled in response to operating conditions, transmission requirements, and control settings. The control of diversity reduces power consumption by enabling receive diversity on given conditions. Operating conditions, transmission requirements, and control settings are used separately or used in conjunction to determine whether benefits of multi-antenna receive diversity, such as higher link capacity, higher data throughput, lower transmit power, and lower error rate, warrant the higher power cost of the diversity.
Owner:QUALCOMM INC
Token-based receiver diversity
A token-based receiver diversity processing is described. In one embodiment, a receiver diversity comprises repeaters receiving wirelessly transmitted packets from a mobile station, and one of the repeaters forwarding packets of the wirelessly transmitted packets to a switch if the one repeater is currently assigned to forward packets from the mobile station based on an indicator assigned prior to the wirelessly transmitted packets being sent.
Owner:AVAGO TECH WIRELESS IP SINGAPORE PTE
Methods and apparatus for intelligent receiver operation
Methods and apparatus for adaptively adjusting receiver operation for e.g., power optimization. In one embodiment, operation during diversity operation is adaptively adjusted. Diversity techniques consume significantly more power than non-diversity operation. However, the performance gain from receiver diversity is not always predictable. Consequently, in one embodiment, a device evaluates the overall performance gain contributed by diversity operation and, where the performance gain is insignificant or inadequate, the device disables diversity operation. In one implementation, the device can operate in a static single antenna mode, a dynamic single antenna mode and a dynamic multi-antenna mode.
Owner:APPLE INC
Digital switching wireless receiver diversity and buffer diversity for enhanced reception in a wireless digital audio communication system
InactiveUS20050002480A1Easy to receivePolarisation/directional diversityError prevention/detection by diversity receptionControl signalEngineering
A diversity receiver system applying diversity to improve reception of coded data in presence of fading of the broadcast signal. The communication system includes a diversity receiver system receives the coded data modulated broadcast signal from a transmission channel. The diversity receiver system has a signal acquisition device for evaluation of the signal characteristics of copies of the coded data modulated broadcast signal, extracting the coded data, control signals, and locking signals from the copies of the coded data. A diversity circuit selects one of the copies of the coded data modulated broadcast signals. An error evaluation circuit evaluates the coded data signal for errors and provides an error signal to the diversity circuit indicating an error state of the selected data, wherein the diversity circuit selects a second copy of the coded data modulated broadcast signal.
Owner:FREESYST
Method and apparatus for receive diversity control in wireless communications
Receiver diversity in a wireless device is controlled in response to operating conditions, transmission requirements, and control settings. The control of diversity reduces power consumption by enabling receive diversity on given conditions. Operating conditions, transmission requirements, and control settings are used separately or used in conjunction to determine whether benefits of multi-antenna receive diversity, such as higher link capacity, higher data throughput, lower transmit power, and lower error rate, warrant the higher power cost of the diversity.
Owner:QUALCOMM INC
Load estimation in receiver diversity telecommunication systems
ActiveCN101682429AAlleviate Power Balancing RequirementsLow RBS costPower managementSpatial transmit diversityCommunications systemState variable
Methods and arrangements for providing load reference data in a CDMA wireless communication system with receiver diversity are presented. The method comprises measuring (210) of received total wideband power for more than one receiver branch. Probability distributions for a respective power quantity are estimated (212), related to selected state variables of an estimation algorithm, from quantities representing the measured powers using selected measurement functions of the selected state variables of the estimation algorithm. The selected state variables correspond to cell power quantities and the selected measurement functions correspond to the quantities representing the measured powers. A conditional probability distribution of noise floor measures for the respective branches are computed (214) based on the estimated probability distributions. The method ends with provision (216) of load reference data based on the computed conditional probability distributions of the noise floor measures.
Owner:TELEFON AB LM ERICSSON (PUBL)
Wi-Fi Adaptive Receiver Diversity
Wireless communication devices with multiple receive (RX) chains may be operated to maintain high performance while saving power. This may be accomplished by evaluating signal strength during transmission of the RX packets, and / or evaluating a possible imbalance (gain difference) between the multiple RX chains within the wireless communication device. Signal strength (or good signal) detection may be enabled when non-MIMO (non-multiple-in-multiple-out) transmissions are taking place, while imbalance detection (antenna gain comparison) may be enabled when a specified number of single-stream packets have been received. Once the decision has been made to operate in a reduced number RX path mode, decision to reactivate one or more additional RX paths may be made based on MIMO detection, a detection of a drop in signal quality, and / or upon expiration of a power save timer.
Owner:APPLE INC
Wi-fi adaptive receiver diversity and wi-fi adaptive transmit antenna selection
Wireless communication devices (UEs) may include multiple receive (RX) chains and associated antennas, and at least one transmit (TX) chain co-located with one of the RX chains. The UE may track instant fading of the antenna gain(s) during reception of packets from an associated access point (AP) device to which the UE intends to transmit packets. The UE may also track long term antenna gain(s), using any packets received at the multiple RX chains within the UE. At a switching occasion, a decision is made by the UE whether to switch antennas. If the instant fading detection is based on packets received no later than a specified time period prior to the switching occasion, then the UE may make the switching decision based on the results of the instant fading tracking. Otherwise, the UE may make the switching decision based on the results of the long term antenna gain tracking. The wireless communication devices may also evaluate signal strength during transmission of the RX packets, and / or may evaluate a possible imbalance (gain difference) between the multiple RX chains within the wireless communication device. Signal strength detection may be enabled when non-MIMO transmissions are taking place, while imbalance detection (antenna gain comparison) may be enabled when a specified number of single-stream packets have been received. Once the decision has been made to operate in a reduced number RX path mode, decision to reactivate one or more additional RX paths may be made based on MIMO detection, a detection of a drop in signal quality, and / or upon expiration of a power save timer.
Owner:APPLE INC
Method for realizing wireless microphone receiver diversity by utilizing noise and diversity system
InactiveCN101854182AEliminate burst noiseMouthpiece/microphone attachmentsTransmissionWireless microphoneEngineering
The invention relates to a method for realizing wireless microphone receiver diversity by utilizing noise and diversity system. The method includes that a receiving unit circuit processes a radio frequency signal and then outputs a demodulating signal to a single-pole double-throw switch, the receiving unit circuit also outputs a field intensity signal, and the field intensity signal is input to the two ends of a field intensity comparer by virtue of a low pass filter; a high pass filter filters low frequency component from the demodulating signal and remains high frequency noise component, a direct current voltage in direct proportion with the intensity and amplitude of the high frequency noise component is output by virtue of a noise detector, the direct current voltage controls the opening and close of a single-pole single-throw switch, when the intensity of one radio frequency signal rapidly falls and the direct current exceeds the preset threshold value, the single-pole single-throw switch is grounded, and the single-pole double-throw switch is switched to another demodulating signal. The invention can eliminate action lag caused by field intensity diversity circuit and burst noise produced in rapid falling of radio frequency signal intensity.
Owner:朱成超
Receiver
InactiveUS20120019730A1Convenience to workAntenna gain is improved advantageouslyTelevision system detailsSpatial transmit diversityEngineeringRadio wave
The receiver diversity-receives radio wave with a plurality of antennas. The receiver includes a conductive case having a receiving section for executing diversity-receiving processing, a first through hole and a second through hole that are disposed on the surface of the same side of the case and penetrate the case from the outside to the inside, a first antenna and a second antenna for supplying a received signal to the receiving section, and a first hinge and a second hinge that are fixed to the inside of the case, pass the first through hole and the second through hole, directly or indirectly support the first antenna and the second antenna, and are movable, respectively. A partition is disposed between the first through hole and the second through hole.
Owner:PANASONIC CORP
Radio Network Control
ActiveUS20120082097A1Increase capacity and coverage and throughput and qualitySite diversityError detection/prevention using signal quality detectorRadio networksAbsolute measurement
A radio network control method that allows uplink signals transmitted by a mobile station to be received by two or more selected base station radio systems and then combined, thus providing receiver diversity. The method requires measurement of radio link qualities of the OFDM signals passing between mobile station and base station radio system. The method is selectively applied to individual mobile stations and for each mobile station to a selection from the available base station radio systems—the selection being based upon the relative and / or absolute measurements of radio link qualities.
Owner:VODAFONE IP LICENSING
An antenna arrangement having receiver diversity and a portable device comprising such an antenna arrangement
The present invention relates to antenna arrangement for a portable device, wherein the antenna arrangement comprises a main radiating element (1) and a diversity radiating element (2). The main radiating element (1) is configured to be tuned (4) to part of a receiving frequency band of said antenna arrangement, and the diversity radiating element (2) is configured to be tuned (5) to another part of the receiving frequency band.
Owner:LAIRD TECH INC
High speed uplink grouping access scheduling method based on double aerial unbalance
InactiveCN101252380AReduce complexityImprove scheduling accuracyDiversity/multi-antenna systemsRadio/inductive link selection arrangementsDiversity schemeSignal-to-interference ratio
Owner:ZTE CORP
Wireless receiver with receive diversity
ActiveUS9729224B2Raise the ratioGood correlationSpatial transmit diversityChannel parameterEngineering
Wireless receivers are described for receiving signals from a transmitter. A receiver can include a plurality of antennas each for receiving a version of a signal via a different propagation channel and providing that version to a respective input. Signal processing means can be included and configured to operate diversity processing of a supplied number of said inputs for use in performing detection of said signal. The receiver can include channel parameter estimation means, configured to estimate one or more channel parameters on the propagation channels. The receiver can also include selection means configured to select only a subset of said inputs to implement a specific dimensionality of the receiver diversity processing, in dependence on the one or more channel parameters indicative of channel conditions on said propagation channels. The diversity processing can be linear or non-linear. Related methods and software implementations and computer program products are also described.
Owner:ICERA INC
Methods and apparatus for adaptive receiver diversity in a wireless network
Apparatus and methods for implementing "intelligent" receive diversity management in e.g., a mobile device.. In one implementation, the mobile device includes an LTE-enabied UE, and the intelligent diversity management includes selectively disabling receive diversity (RxD) in that device upon meeting a plurality of criteria including (i) a capacity criterion, and (it) a connectivity criterion. In one variant, the capacity criterion includes ensuring that an achievable data rate associated with a single Rx (receive) chain is comparable to that with RxD.
Owner:APPLE INC
Method and apparatus for acquiring code group in asynchronous wideband code division multiple access system using receiver diversity
InactiveUS7876731B2Increase the number ofMinimizing of amountSynchronisation arrangementPolarisation/directional diversityCode division multiple accessWideband
Disclosed herein are a method and apparatus for acquiring a code group in an asynchronous Wideband Code Division Multiple Access (WCDMA) system. A primary synchronization channel search unit achieves primary synchronization channel slot timing synchronization. Then, the 1-1 search unit and 1-2 search unit of a secondary synchronization channel receive secondary synchronization channels from first and second antennas, respectively, start correlation operations between some of the slots of the received channels and code group candidates, and transmit information about candidates having values exceeding a predetermined threshold value to a determination unit. The determination unit transmits the received information about candidates to a second search unit of the secondary synchronization channel. The second search unit of the secondary synchronization channel calculates correlation characteristics based on the received information about candidates and selects a code group candidate having a highest correlation characteristic.
Owner:SK TELECOM CO LTD +1
Adaptive use of receiver diversity
A method for adaptively disabling receiver diversity is provided. The method can include a wireless communication device determining an active data traffic pattern; defining a threshold channel quality metric based at least in part on a threshold channel quality needed to support a threshold quality of service for the active data traffic pattern; comparing a measured channel quality to the threshold channel quality metric; and disabling receiver diversity in an instance in which the measured channel quality metric satisfies the threshold channel quality metric.
Owner:APPLE INC
Diversity receiver utilizing sea wave feature information
InactiveCN104253641AImprove communication stabilityMake full use of diversity reception capabilitySpatial transmit diversityReceiver diversitySea waves
The invention discloses a diversity receiving technology utilizing sea wave feature information. In order to solve the multi-path interference problem in sea surface beyond-visual-range communication. The sea wave feature information is utilized for realizing the time and frequency diversity receiving. A diversity receiver has the basic scheme that the diversity receiver comprises an FPGA (field programmable gate array), a microprocessor, an air speed and air direction sensor, a navigator and the like. The sea wave feature information is utilized, so that the multi-path signals can be effectively utilized, the diversity gain of the receiver is improved, further, the communication stability of the sea surface beyond-visual-range communication is improved, and the communication error rate is reduced.
Owner:HARBIN INST OF TECH AT WEIHAI
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