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105 results about "Covering code" patented technology
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In coding theory, a covering code is a set of elements (called codewords) in a space, with the property that every element of the space is within a fixed distance of some codeword.
Transmission of uplink control signals in a communication system
ActiveUS20120033587A1Modulated-carrier systemsTransmission path divisionCommunications systemControl signal
A method and apparatus of a User Equipment (UE) to simultaneously transmit information of a first type and information of a second type over a number of transmission symbols, the information of the first type and the information of the second type being respectively associated with a first Orthogonal Cover Code (OCC) and a second OCC, wherein a length of each OCC is equal to the number of transmission symbols. The method includes multiplying, at each transmission symbol, the information of the first type with a respective element of the first OCC to obtain a first output; multiplying, at each transmission symbol, the information of the second type with a respective element of the second OCC to obtain a second output; summing the first output and the second output to obtain a combined output; and transmitting the combined output.
Owner:SAMSUNG ELECTRONICS CO LTD
Method and system for indicating uplink demodulation reference signal
InactiveCN101882980ASolve the problem that the requirements for uplink multi-antenna port transmission cannot be metMulti-frequency code systemsPilot signal allocationComputer scienceUser equipment
The invention provides a method and a system for indicating an uplink demodulation reference signal. The method comprises the following steps: a base station sends indication information to user equipment, wherein the indication information indicates at least one of the cyclic shift, the orthogonal cover code and the sequence hopping / sequence group hopping (SGH) mode of the demodulation reference signal; and the user equipment sends data and the demodulation reference signal to the base station according to the orthogonal cover code of the demodulation reference signal. The invention can indicate the parameters of the demodulation reference signal so as to meet the requirements of uplink multi-antenna port transmission.
Owner:深圳市恒程汇文化科技有限公司
Application of sequence hopping and orthogonal covering codes to uplink reference signals
ActiveUS20110206089A1Error preventionFrequency-division multiplex detailsCommunications systemControl channel
Methods and apparatuses are provided to enable User Equipments (UEs) to apply Orthogonal Covering Codes (OCC) to the transmission of Reference Signals (RS) generated from Constant Amplitude Zero Auto-Correlation (CAZAC) sequences, to enable hopping of these sequences in a communication system in conjunction with enabling the application of OCC, and to differentiate the application of sequence hopping between transmissions in data channels and transmissions in control channels.
Owner:SAMSUNG ELECTRONICS CO LTD
Method and apparatus for transmitting and receiving demodulation reference signal
ActiveUS20180278395A1Increase the number of layersIncrease the number ofError preventionModulated-carrier systemsResource elementComputer science
Methods, apparatuses, and systems described herein generally relate to a reference signal generation and mapping. For example, a method comprises determining a first set of antenna ports for a demodulation reference signal (DM-RS) transmission; determining, based on the first set, a frequency index associated with four adjacent resource elements, wherein the four adjacent resource elements correspond to two adjacent symbols in a time axis and to two adjacent subcarriers in a frequency axis; generating, based on a first orthogonal cover code and a second orthogonal cover code, a DM-RS associated with the first set of antenna ports; and transmitting, via a mapping to the four adjacent resource elements, the DM-RS associated with the first set of antenna ports.
Owner:INNOVATIVE TECH LAB CO LTD
Method and device for generating pilot frequency sequence
ActiveCN102202027ALower estimated impactHigh precisionTransmission path divisionMulti-frequency code systemsMultiplexingCarrier signal
The invention discloses a method for generating a pilot frequency sequence. The method comprises the following steps of: selecting OCCs (Orthogonal Cover Code) from an OCC set according to different rules in each code division and frequency division and / or time division hybrid multiplexing demodulation reference signal (DMRS) port by using different code division multiplexing groups and / or generating scrambling sequences of the DMRS according to different rules by using different code division multiplexing groups; and multiplying the selected OCCs with the scrambling sequences to generate a final pilot frequency sequence of each DMRS port. The invention further discloses a device for generating a pilot frequency sequence. By adopting the method and the device, corresponding layers among different code division multiplexing port groups can be lowered, the influence of inter-carrier interference caused by the problems of Doppler frequency shift and timing error on channel estimation is reduced, and the channel estimation accuracy is increased.
Owner:ZTE CORP
Apparatus and method for orthogonal cover code (OCC) generation, and apparatus and method for occ mapping
InactiveUS20130070580A1Improve robustnessOvercome problemsModulated-carrier systemsTransmission path divisionComputer scienceColumn vector
An apparatus and method for Orthogonal Cover Code (OCC) generation, and OCC mapping, includes generating the first group of OCC sequences, which is used to generate the first group of OCC sequences; generating the second group of OCC sequences, which is used to mirror the columns of the first group of OCC sequences to generate the second group of OCC sequences; generating the third group of OCC sequences, which is used to perform cyclic shift on the column vectors of the first group of OCC sequences to generate the third group of OCC sequences; and generating the fourth group of OCC sequences, which is used to mirror the columns of the third group of OCC sequences to generate the fourth group of OCC sequences.
Owner:FUJITSU LTD
Method and device for transmitting reference signal in wireless communication system
InactiveUS20130195034A1Reduce complexityLow implementation costModulated-carrier systemsSignal allocationCommunications systemResource element
Disclosed are a method and device for transmitting a reference signal in a wireless communication system. A base station: maps each demodulation reference signal (DMRS) of each of a plurality of layers into a first resource element (RE) set and a second resource element set including four resource elements over four orthogonal frequency division multiplexing (OFDM) symbols within a subframe; allocates first orthogonal cover codes (OCCs) having a length of 4 to each DMRS mapped into said first resource element set; allocates second OCCs having a length of 4 to each DMRS mapped into said second resource element set; and transmits each DMRS mapped into said first resource element set and said second resource element set. Said subframe includes two slots, and each slot includes six OFDM symbols. Said second OCC are formed by respectively swapping positions of bits that constitute said first OCCs.
Owner:LG ELECTRONICS INC
Resource assignments for uplink control channel
A wireless communication method includes allocating physical uplink control channel (PUCCH) data in first slot to a first orthogonal cover code (OCC). The method also includes allocating PUCCH data in a second slot of the same subframe to a different orthogonal cover code (OCC). Another method includes mapping PUCCH resources to physical resource blocks based on a user equipment (UE) specific signaling parameter (e.g., a resource index) and a number of symbols in a slot of a subframe.
Owner:QUALCOMM INC
DMRS (demodulation reference signal) indication method, system, base station and user equipment
ActiveCN106470087ASupport mobilityMeet the requirements to indicate DMRSError prevention/detection by using return channelModulated-carrier systemsUser equipmentComputer science
The present invention discloses a DMRS (demodulation reference signal) indication method. The method includes the following steps that: designated DMRS ports, layers and orthogonal cover code (OCC) lengths are assigned to user equipment (UE) according to a DMRS configuration parameter indication table; various kinds of DMRS configuration parameter indication entries of various kinds of OCC length combinations containing at least two OCC lengths are recorded in the DMRS configuration parameter indication table; and corresponding DMRS indication information is generated according to the DMRS configuration parameter information assigned to the UE, and the corresponding DMRS indication information is sent to the UE. The present invention also discloses a base station, UE (user equipment) and a DMRS (demodulation reference signal) indication system.
Owner:CHINA MOBILE COMM GRP CO LTD
Method and user equipment for transmitting pucch when more than five cells are used according to carrier aggregation
InactiveUS20170366380A1Solve problemsSynchronisation arrangementError preventionResource elementCarrier signal
Provided in one disclosure of the present specification provides a method for transmitting a physical uplink control channel (PUCCH) including uplink control information (UCI), when more than five cells are used by a user equipment (UE) according to carrier aggregation. The method may comprise the steps of: encoding UCI of K bits, which exceeds 20 bits, and outputting encoded bits of N bits; and mapping on resource elements (RE) in an uplink subframe, without applying an orthogonal cover code (OCC) to the encoded N bits, wherein the uplink subframe may include two symbols, and wherein each symbol may include 12 subcarriers on a frequency axis and six or seven symbols on a time axis. The mapping step may be carried out according to a symbol index and from among symbols remaining after excluding symbols for a demodulation reference signal (DMRS) and a subcarrier index.
Owner:LG ELECTRONICS INC
Method and apparatus for transmitting a reference signal in a multi-antenna system
ActiveUS20120250656A1Channel estimation performance can be guaranteedGuaranteed performanceModulated-carrier systemsSignal allocationControl channelComputer science
Provided are a method and apparatus for transmitting a reference signal in a multi-antenna system. A terminal generates a plurality of reference signal sequences in which cyclic shift values that are different from each other are allocated to the respective plurality of layers, and generates an orthogonal frequency division multiplexing (SC-FDMA) symbol to which the plurality of reference signal sequences are mapped. The SC-FDMA symbol is transmitted to a base station via a plurality of antennas. Each of the reference signal sequences is multiplied by either +1 or −1 in accordance with an orthogonal covering code (OCC) index corresponding to the cyclic shift field in a DCI format transmitted via a physical downlink control channel (PDCCH) for each layer.
Owner:LG ELECTRONICS INC
Dynamic symbolic execution method and device thereof based on overall situation super block dominator graph
ActiveCN103116540AImprove execution efficiencyAlleviate the path explosion problemSoftware testing/debuggingAlgorithmTheoretical computer science
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Resource allocation method and related device for dedicated demodulation reference signal
ActiveCN102300313AImprove interferenceSimplify complexityPilot signal allocationWireless commuication servicesControl signalSignal correlation
The embodiment of the invention discloses a resource allocation method of a dedicated demodulation reference signal and a relevant device, wherein the resource allocation method of the dedicated demodulation reference signal comprises the steps of: determining number of transmission layers on which UE (User Equipment) transmits uplink data; according to the determined number of the transmission layers, selecting to generate a combination allocation of CS (Cyclic Shift) and OCC (Orthogonal Cover Code) sequence resources required to be adopted by DMRS (Demodulation Reference Signals) of all transmission layers on which the UE transmits the uplink data from one combination allocation item of a plurality of preset combination allocation items of the CS and OCC sequence resources adopted by the DMRS sequences of all transmission layers and set aiming at the number of the maximum transmission layers supported by a system; and generating and sending a control signaling including allocation indication information to the UE. According to the scheme of the embodiment of the invention, the complexity of describing the DMRS resource allocation by a protocol can be simplified, and the DMRS interference among codons is favorably improved.
Owner:HUAWEI TECH CO LTD
Method of scrambling reference signals, device and user equipment using the method
ActiveUS20140355408A1Reduce distractionsSite diversityModulated-carrier systemsResource blockComputer science
A Method of scrambling reference signals, device and user equipment using the method are provided. In the method, a plurality of layers of reference signals assigned on predetermined radio resource of a plurality of layers of resource blocks with the same time and frequency resources are scrambled, the method comprising: an orthogonalizing step of multiplying each layer of reference signal selectively by one of a plurality of orthogonal cover codes (OCCs) with the same length wherein the OCC multiplied to a first layer of reference signal can be configured as different from those multiplied to other layers of reference signals; and a scrambling step of multiplying all of symbols obtained from the OCC multiplied to each of the other layers of reference signals by a symbol-common scrambling sequence wherein the symbol-common scrambling sequences can be different from each other for reference signals multiplied by the same OCC.
Owner:SUN PATENT TRUST
Methods, apparatuses, system, and related computer program product for resource allocation
ActiveCN101911580AModulated-carrier systemsTransmission path divisionUplink schedulingComputer science
Embodiments provide a method and apparatus wherein respective demodulation reference signals, DM RS, of a user bandwidth can be cyclically shifted with respect to each other. An uplink scheduling grant may comprise an index for DM RS resource having a cyclic shift and an orthogonal cover code or interleaved frequency division multiple comb wherein a usage orthogonal cover or interleaved frequency division multiple comb may configured using radio resource control message. A usage orthogonal cover or interleaved frequency division multiple comb may optionally be tied statically into DM RS resources. At least some of respective demodulation reference signals of the at least two user bandwidths may be mutually orthogonal.
Owner:CELLULAR COMM EQUIP LLC
Application of sequence hopping and orthogonal covering codes to uplink reference signals
Owner:SAMSUNG ELECTRONICS CO LTD
Application of sequence hopping and orthogonal covering codes to uplink reference signals
ActiveUS8483258B2Error preventionFrequency-division multiplex detailsCommunications systemControl channel
Methods and apparatuses are provided to enable User Equipments (UEs) to apply Orthogonal Covering Codes (OCC) to the transmission of Reference Signals (RS) generated from Constant Amplitude Zero Auto-Correlation (CAZAC) sequences, to enable hopping of these sequences in a communication system in conjunction with enabling the application of OCC, and to differentiate the application of sequence hopping between transmissions in data channels and transmissions in control channels.
Owner:SAMSUNG ELECTRONICS CO LTD
Transmission method for demodulation reference signal of physical uplink shared channel and user equipment (UE)
ActiveCN103312399ASolve the problem of not being able to decode correctlyAvoid collisionSpatial transmit diversityWireless communicationCell specificResource utilization
The invention discloses a transmission method for a demodulation reference signal of a physical uplink shared channel and user equipment (UE). The method comprises the following steps that the UE receives signaling configuration information for the UE to determine the demodulation reference signal of the physical uplink shared channel; and the UE determines the demodulation reference signal of the physical uplink shared channel by using the signaling configuration information, and transmits the demodulation reference signal, wherein the signaling configuration information comprises at least one of parameters of UE-specific sequence group number offset, a UE-specific cell identification number, UE-specific cell identification offset, UE-specific sequence group pattern offset, UE-specific sequence shift pattern offset and UE-specific or cell-specific CS (cyclic shift) hopping-enabled signaling. According to the scheme, the problem that an OCC (orthogonal cover code) cannot be accurately decoded due to inconsistent CS hopping patterns and the problem of collision of a UE-specific sequence and a cell-specific sequence can be effectively solved, so that the performance of a CoMP (coordinated multiple point) system is improved, and the resource utilization rate of the CoMP system is increased.
Owner:ZTE CORP
METHOD AND APPARATUS FOR TRANSMITTING A REFERENCE SIGNAL IN A MULTl-ANTENNA SYSTEM
ActiveUS20150139165A1Guaranteed performanceGuaranteed estimated performanceSignal allocationRadio transmissionCommunications systemControl channel
Owner:LG ELECTRONICS INC
Special order book production system
A method of book production wherein a customer sends a computer file of a book to a producer whose computer book production program restructures the text and cover data to fit a standard / preferred size accommodated by the producer's book binding system. The program then calculates the spine dimensions, and this is sent to the customer for determining a layout and content for printing on the spine. The layout is sent to the producer who inserts it into the book production program with a job identification spine code. The producer inserts a code in the cover data identifying the corresponding text and spine. At the beginning of each day / production run, the producer simply enters the covers in the desired order into the production program. The program reads the cover code, which identifies the corresponding stack and spine and directs the printing and binding accordingly.
Owner:CAFEPRESS COM
Method for transmitting and receiving uplink control information in mobile communication system, and apparatus for the same
InactiveUS20190053218A1Reduce error rateMeet the requirementsError prevention/detection by using return channelTransmission path divisionComputer terminalControl channel
An operation method of a terminal for transmitting uplink control information (UCI) to a base station by multiplexing two or more UCIs in a single physical uplink control channel (PUCCH) includes: determining a first sequence corresponding to a value of a second UCI (UCI2) when the UCI2 is generated before completing transmission of a first UCI (UCI1) to the base station; modulating the first sequence by applying a modulation symbol corresponding to a value of the UCI1, and applying a orthogonal cover code (OCC) to the modulated first sequence to generate a second sequence; and transmitting the second sequence in at least one symbol position of symbols constituting the PUCCH.
Owner:ELECTRONICS & TELECOMM RES INST
Resource configuration method and relevant device special for demodulation reference signal (DMRS)
ActiveCN103209490AImprove interferenceSimplify complexityWireless communicationControl signalConfiguration item
The embodiment of the invention discloses a resource configuration method and a relevant device special for a demodulation reference signal (DMRS). According to one embodiment, the method can comprise the following steps of: determining the number of transmission layers on which user equipment (UE) transmits uplink data; according to the determined number of the transmission layers, selecting a combined configuration item of cyclic shift (CS) and orthogonal cover code (OCC) sequence resources required to be adopted by DMRS sequences for generating the transmission layers on which the UE transmits the uplink data from a plurality of preset combined configuration items, which are set aiming at the maximum transmission layer number supported by a system, of the CS and OCC sequence resources which can be adopted by the DMRS sequences for generating the transmission layers on which the UE transmits the uplink data; and generating and issuing a control signal involving configuration instruction information. By the technical scheme, the complexity of describing DMRS resource configuration in a protocol can be reduced, and DMRS interference among code words can be avoided.
Owner:HUAWEI TECH CO LTD
Orthogonal cover code indication and demodulation reference signal processing methods, system and equipment
ActiveCN102130761ASolve the problem of weighted processingMulti-frequency code systemsTransmission path multiple useUser equipmentSignal processing
The embodiment of the invention discloses an orthogonal cover code (OCC) indication method, a demodulation reference signal (DMRS) processing method, a system and equipment, which relate to the field of wireless communication and are used for solving the technical problem that user equipment in the prior art cannot determine whether to use an OCC sequence or not and determine which OCC sequence to perform weighting processing on a DMRS. The OCC indication method comprises the following steps of: determining whether the user equipment (UE) is required to use the OCC sequence for performing the weighting processing on the DMRS to be transmitted or not by using a network side, determining the OCC sequence used for performing the weighting processing on the DMRS by the UE and transmitting the information of the OCC sequence to the UE if the UE is required to use the OCC sequence for performing the weighting processing on the DMRS to be transmitted, otherwise, transmitting the information indicating that the UE is not required to use the OCC sequence for performing the weighting processing on the DMRS to the UE. By the methods, the user equipment can determine whether to use the OCC sequence or not and determine which OCC sequence to perform the weighting processing on the DMRS according to the indication of the network side.
Owner:DATANG MOBILE COMM EQUIP CO LTD
Method and device for transmitting reference signal in wireless communication system
InactiveUS9179464B2Equally distributedReduce complexitySignal allocationMulti-frequency code systemsCommunications systemResource element
A method and device for transmitting a reference signal in a wireless communication system is provided. A base station maps each demodulation reference signal (DMRS) of each of a plurality of layers into a first resource element (RE) set and a second RE set including four REs over four orthogonal frequency division multiplexing (OFDM) symbols within a subframe, allocates first orthogonal cover codes (OCCs) having a length of 4 to each DMRS mapped into the first RE set, allocates second OCCs having a length of 4 to each DMRS mapped into the second resource element set and transmits each DMRS mapped into the first RE set and the second RE set. The subframe includes two slots and each slot includes six OFDM symbols. The second OCC are formed by swapping positions of bits that constitute the first OCCs.
Owner:LG ELECTRONICS INC
Special order book production system
A method of book production wherein a customer sends a computer file of a book to a producer whose computer book production program restructures the text and cover data to fit a standard / preferred size accommodated by the producer's book binding system. The program then calculates the spine dimensions, and this is sent to the customer for determining a layout and content for printing on the spine. The layout is sent to the producer who inserts it into the book production program with a job identification spine code. The producer inserts a code in the cover data identifying the corresponding text and spine. At the beginning of each day / production run, the producer simply enters the covers in the desired order into the production program. The program reads the cover code, which identifies the corresponding stack and spine and directs the printing and binding accordingly.
Owner:CAFEPRESS COM
Method and system for automatic creation of touring tests
The disclosure provides an approach for automatically analyzing data related to software development, such as the number of defects, number of code line changes, number of test cases covering code, etc., and creating exploratory tests based on tour templates. In one embodiment, a test generating application matches descriptions, tags and / or keywords in the tour templates with data from development tools used to develop and test software. The test generating application combines the tour templates with the matching data to create exploratory tests for testers to perform. In addition, the test generating application may rank the created tests based on a measure of importance and determine a number of highest ranking tests or test types that can be executed given a capacity of the software tester or testing team. The highest ranking tests may then be provided to the software tester or testing team to perform prior to the software's release.
Owner:IBM CORP
Method and user equipment for transmitting pucch when more than five cells are used according to carrier aggregation
Provided in one disclosure of the present specification provides a method for transmitting a physical uplink control channel (PUCCH) including uplink control information (UCI), when more than five cells are used by a user equipment (UE) according to carrier aggregation. The method may comprise the steps of: encoding UCI of K bits, which exceeds 20 bits, and outputting encoded bits of N bits; and mapping on resource elements (RE) in an uplink subframe, without applying an orthogonal cover code (OCC) to the encoded N bits, wherein the uplink subframe may include two symbols, and wherein each symbol may include 12 subcarriers on a frequency axis and six or seven symbols on a time axis. The mapping step may be carried out according to a symbol index and from among symbols remaining after excluding symbols for a demodulation reference signal (DMRS) and a subcarrier index.
Owner:LG ELECTRONICS INC
Method and system for transmitting uplink demodulation reference signal
ActiveCN103944662AReduce overheadIncrease coverage capacityMulti-frequency code systemsError prevention/detection by diversity receptionDemodulationCovering code
The invention provides a method and a system for transmitting an uplink demodulation reference signal (DMRS). The method comprises the steps of acquiring a transmitting position of the uplink DMRS, and determining an OCC (orthogonal covering code) relevant to the uplink DMRS according to network-side OCC indicating information; and transmitting the uplink DMRS according to the transmitting position and the OCC.
Owner:ZTE CORP
Method for transmitting uplink control channel in wireless communication system and apparatus for same
ActiveUS20190132102A1Easy transferEasy to useModulated-carrier systemsTransmission path divisionCommunications systemResource element
Disclosed are a method for transmitting an uplink control channel in a wireless communication system and an apparatus for the same. Particularly, the method comprises the steps of: receiving allocation of a resource region including one or more symbols for transmission of an uplink control channel; and mapping uplink control information and a reference signal to each specific resource group unit in the allocated resource region, wherein the specific resource group unit may comprise a first resource element having the reference signal mapped thereto and second resource elements having the at least one piece of uplink control information mapped thereto, the second resource elements may be arranged adjacent to the first resource element, and the second resource elements may be multiplexed according to orthogonal cover codes in a clockwise or counter-clockwise direction.
Owner:LG ELECTRONICS INC
Uplink reference signal transmission method and receiving method, and user equipment and base station
InactiveCN106954261AModulated-carrier systemsPilot signal allocationUplink transmissionControl channel
The invention provides an uplink reference signal transmission method executed by user equipment UE. The method comprises the following steps: determining one or a plurality of parameters, wherein the one or a plurality of parameters are used for generating a Demodulation Reference Signal DMRS of a Narrowband Internet of Things Physical Uplink Control Channel NB-PUCCH, wherein for single-tone uplink transmission, a parameter used for generating the DMRS comprises an orthogonal cover code OCC sequence and a basic sequence; for multi-tone uplink transmission, a parameter used for generating the DMRS comprises cyclic shift, the OCC sequence and the basic sequence; based on the determined parameters, generating the DMRS of the NB-PUCCH; and transmitting the generated DMRS of the NB-PUCCH to a base station. Correspondingly, the invention further provides an uplink reference signal receiving method executed by the base station, and the UE and the base station which respectively execute the above method.
Owner:SHARP KK
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