141results about "Multiplex code allocation" patented technology

Embodiments herein provide techniques for transmission of a physical uplink control channel (PUCCH) in a wireless cellular network. For example, transmission schemes are provided for sequence-based transmission of a PUCCH and / or to improve PUCCH coverage. User equipment (UE) may: determine uplink control information (UCI) pay load information for the PUCCH with a PUCCH format 1; determine a sequence for transmission of the PUCCH based on the UCI pay load information; and map the determined sequence to allocated resources for the PUCCH format 1 for transmission.

Methods, systems, and devices for increasing transmission capacity of sounding reference signals (SRS) in mobile communication technology are described. An example method for wireless communication includes receiving, by a wireless device from a network node, a configuration comprising A orthogonal code sequences for a sounding reference signal (SRS) resource, wherein each of the A orthogonal code sequences is configured for L adjacent SRS symbols within the SRS resource, wherein L is a length of each of the A orthogonal code sequences, and wherein L and A are positive integers, and transmitting a reference signal that is generated based on the configuration.

A system and method for enabling downlink signal transmission in a Multiple-Input Multiple-Output (MU-MIMO) system is provided. The method comprises of creating a scheduling information based on MU-MIMO Scheduling of a plurality of User equipments (UES), multiplexing the plurality of UES paired based on the scheduling decisions across time, frequency and code, inputting transport blocks of each UE pushed on to a Downlink shared channel (DLSCH), performing bit processing of each of the CRC encoded UEs, inputting Code-rate (MCS) for data modulation mapping on a post bit processed data, assigning DM-RS ports to the UE based on allocated MCS and number of antenna ports from a scheduling information structure, adding, a Partial Port Occupancy information (P-Poi) for each UE along with the scheduler information structure required for demodulation at UE and enabling optimal channel estimation at UE by adding new DM-RS port combinations using reserved fields in the DCI messaging.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments herein disclose a method and a base station (100) for managing sounding reference signal (SRS) transmission in a wireless communication. The method includes receiving the SRS transmitted from a group of user equipments (UEs) (200a-200d) in the wireless communication over same time-frequency resource. The method also determines the transmission variant by decoding the SRS. Further, the method includes performing one of: estimating at least one channel of receiving the SRS from each UE of the group of UEs (200a-200d) in the slot using a first receiver when the transmission variant is one of the C-CDM-C-CS variant or the V-CDM-C-CS variant, and estimating at least one channel of receiving the SRS from each UE of the group of UEs (200a-200d) in the slot using a second receiver when the transmission variant is one of the C-CDM-C-CS variant or the C-CDM-V-CS variant.

A method and system for improving channel estimation for multi-user, multiple-input, multiple-output (MU-MIMO) systems through dynamic DM-RS port allocation in a 5G New Radio network is provided. The method comprises of allocating, by a Scheduler aware UE port allocation unit, one or more MU-MIMO ports to a plurality of code division multiplexing (CDM) groups for a plurality of UE users, performing, by a code selection unit, a code selection based on a number of allocated MU-MIMO ports, determining, by a spreading factor unit, a spreading factor allocated for each of the MU-MIMO ports in each of the plurality of CDM groups, determining, by a signalling unit, a Downlink Control Information (DCI) signalling of a Partial Port Occupancy (P-Poi) transmission for each UE and obtaining, by a channel estimation unit, channel estimates at the receiver through VSFOCC de-spreading based on the P-POI assigned for each of the MU-MIMO ports.

When a plurality of terminals share the same resources in a wireless communication system, and when control information such as acknowledgement / negative acknowledgement (ACK / NAK) information or scheduling information is transmitted, a method of efficiently performing code division multiplexing (CDM) is required to distinguish the plurality of terminals. In particular, it is necessary to develop a method by which a code sequence of CDM can be selected and used according to each cell condition. Provided is a method of forming a signal in a wireless communication system in which a plurality of terminals commonly share frequency and time resources. The method includes the operations of receiving condition information in a cell; selecting one of a plurality of time domain orthogonal sequences having different lengths, according to the condition information; and allocating the selected time domain orthogonal sequence to a control signal symbol block.

A communication device according to an embodiment includes a memory and one or more processors coupled to the memory. The one or more processors are configured to: receive an OFDM signal and convert the OFDM signal into a time-axis waveform signal of a baseband; extract a part of the time-axis waveform signal, and calculate a correlation value between the extracted signal and a known signal; execute FFT on the time-axis waveform signal; extract a part of a frequency-axis waveform signal on which the FFT is executed, and calculate a degree of similarity between the extracted signal and a known signal; and estimate a switching timing between uplink communication and downlink communication in the communication device based on a calculation result of the similarity degree.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may account for the application of orthogonal cover coding (OCC) to an uplink transmission when determining the transport block size (TBS) for the uplink transmission. OCC may be used to multiplex transmissions from multiple UEs and may involve spreading information. Described techniques may involve accounting for the spreading of information bits when determining the TBS for the uplink transmission to which OCC is applied. Sub-physical resource block (sub-PRB) frequency allocations may be provided for uplink transmissions. The UE may account for the allocated quantity of sub-carriers when determining the quantity of information bits. To indicate a sub-PRB, the UE may be configured to reinterpret one or more fields of an existing downlink control information (DCI) format as indicating the allocated sub-carriers, or a new DCI format may be configured that includes fields for indicating a sub-PRB allocation.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine, when using resource spread multiple access with non-orthogonal multiple access, that a particular modulation scheme is enabled. The user equipment may process symbols using a set of processing sequences selected based at least in part on the particular modulation scheme such that the particular modulation scheme is preserved for the symbols. The user equipment may transmit the symbols based at least in part on processing the symbols using the set of processing sequences. Numerous other aspects are provided.

To reduce the possibility of a collision between different DMRSs in generating the DMRSs for multiplexing with content of message type A (msgA) using a demodulation reference signal (DMRS) scrambling identifier.SOLUTION: User equipment (UE) receives, from a base station (BS), information for identifying a quantity of DMRS sequences supported per antenna panel of the BS. The UE transmits a DMRS communication having one or more DMRS sequences configured based at least in part on the quantity of DMRS sequences supported per antenna panel and scrambled using an extended DMRS scrambling identifier that is based at least in part on a physical random access channel preamble.SELECTED DRAWING: Figure 6

A data transmission method and a communication apparatus are provided. The data transmission method includes: A terminal device and a network device each determine a first sequence number of the terminal device on a first time-frequency resource, and determine, from a signature sequence set, a first signature sequence corresponding to the first sequence number, where a difference between quantities of sequence numbers corresponding to any two signature sequences in the signature sequence set is less than or equal to a first value, and sequence numbers corresponding to any two signature sequences in the signature sequence set are different. The terminal device sends data on the first time-frequency resource by using the first signature sequence. Correspondingly, the network device receives the data on the first time-frequency resource. The network device decodes the data based on the first signature sequence. According to embodiments of this application, a centralized collision of signature sequences can be avoided, and a degree of distinguishing between terminal devices by using the signature sequences can be improved.

Disclosed is a method for transmitting and receiving a channel state information (CSI)-reference signal (RS) in a wireless communication system.Specifically, the method performed by a base station may include: configuring control information indicating that an antenna port for all CSI-RS resources included in a CSI-RS resource set is same, wherein the CSI-RS resource set is used for tracking at least one of a time or a frequency; transmitting the configured control information to a user equipment (UE); and transmitting the CSI-RS to the UE through all the CSI-RS resources.In doing so, the UE is capable of performing time / frequency tracking more precisely.

This application provides a communication method, a communication device, a computer-readable storage medium, a chip, and a computer program product. The communication method includes: determining a first matrix based on a quantity of active terminal devices in a plurality of terminal devices or a quantity of the plurality of terminal devices. The communication method further includes: determining a first sequence based on the first matrix, a probability distribution of to-be-sent data of the plurality of terminal devices, and a predetermined length of the first sequence associated with the plurality of terminal devices. The communication method further includes: performing spreading on modulated data by using the first sequence. The communication method includes: sending spread modulated data to a network device. In the method, sparseness of the active terminal device is used, so that channel decoding complexity can be reduced in a scenario in which the quantity of potential terminal devices is large and the quantity of active terminal devices is small.

Provided is a transmission control method for a plurality of transmitting stations which are connected to a wireless communication partner receiving station by non-orthogonal multiple access, and each of which is capable of transmitting a same signal to the receiving station by repetition for a predetermined number of times at a predetermined cycle, wherein an information processing apparatus executes: acquiring information indicating a code word length for each of the plurality of transmitting stations to use for the repetition; and assigning, to each of the plurality of transmitting stations, transmitting power for ensuring a power difference which is required between transmitting stations, so that the shorter the code word length the higher the receiving power at the receiving station.

Sequence selection techniques for Non-Orthogonal Multiple Access (NOMA) are provided. A User Equipment (UE) sends a request to a base station, the request indicating that the UE is to conduct at least one uplink transmission. The UE receives, in response to the request, an indicator of an expected system load, a value of the indicator including a total number of sequences expected to be used at one time for uplink transmissions in the system. The UE detects that at least two different pairs of sequences in a configured set of sequences have different cross correlation values, the sequences in the set configured for scrambling uplink transmissions. The UE selects, in response to the detecting and based on the indicator, at least one sequence with an improved cross correlation with at least one other sequence the at least one sequence and the at least one other sequence to be used for scrambling uplink transmissions within the system.

The disclosure relates to a method and apparatus for transmitting and receiving a signal in a wireless communication system. An operation method of a terminal in a wireless communication system includes receiving, from a base station, information related to a position of a symbol in which a synchronization signal block is transmitted in a time domain, determining whether a position of a symbol configured to transmit an uplink signal overlaps with the position of the symbol in which the synchronization signal block is transmitted in the time domain, in a case where the position of the symbol configured to transmit the uplink signal overlaps with the position of the symbol in which the synchronization signal block is transmitted in the time domain, determining whether a time or frequency division duplex (XDD) related indicator is configured or received, and transmitting, to the base station, the uplink signal based on a result of the determination of whether the XDD related indicator is configured or received.

Certain aspects of the present disclosure provide techniques for demodulation reference signal (DMRS) sequence selection. One aspect provides a method for wireless communications by a first wireless node. The method generally includes selecting a type of DMRS sequence to use for communications with a second wireless node based on a signal quality associated with the communications, receiving a message having the type of DMRS sequence, and performing channel estimation based on the DMRS sequence using the message.

To enable identification of the transmitting station from the received signal. [Solution] The transmitting station identification signal generation device 10 includes a PRBS generation unit (111) that generates a PRBS signal using an M sequence, a cyclic shift unit (112) that generates a cyclic shift signal by cyclically shifting the PRBS signal based on a transmitting station identification code assigned to the transmitting station, a subcarrier modulation unit (113) that generates a data carrier by phase shift modulation of the cyclic shift signal, and a signal generation unit (114, 115, 116) that generates a transmitting station identification signal by inserting a null carrier into the data carrier and performing OFDM modulation.

A terminal according to an aspect of the present disclosure includes a receiving section that receives information associated with one frequency domain orthogonal cover code (FD-OCC) from among a first FD-OCC having a length of 2 and a second FD-OCC longer than 2, and a control section that applies, based on the information, the FD-OCC to a demodulation reference signal (DMRS) of a shared channel. According to an aspect of the present disclosure, it is possible to use an appropriate number of DMRS ports.

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may consider applying orthogonal coverage coding (OCC) to an uplink transmission when determining a transport block size (TBS) for the uplink transmission. The OCC may be used to multiplex transmissions from multiple UEs and may relate to extension information. The described techniques may involve considering an extension of information bits in determining a TBS for an uplink transmission to which OCC is applied. A sub-physical resource block (sub-PRB) frequency allocation may be provided for uplink transmissions. The UE may account for the number of allocated subcarriers in determining the number of information bits. To indicate the sub-PRB, the UE may be configured to re-interpret one or more fields of an existing downlink control information (DCI) format as indicating the allocated sub-carrier, or may configure a new DCI format including a field for indicating the sub-PRB allocation.

An embodiment of the present application provides a communication method. The method is applicable to wireless local area network systems supporting 802.11 series protocols, such as next-generation Wi-Fi protocols of IEEE 802.11ax, such as 802.11be, Wi-Fi 7, or EHT, or, as another example, next-generation protocols of 802.11be, Wi-Fi 8, UHR, or Wi-Fi AI, and may also be applicable to ultra-wideband UWB-based wireless personal area network systems and sensing systems. The method includes: a transmitting end device generating and transmitting a PPDU, where the PPDU includes a high-frequency physical layer signal, the high-frequency physical layer signal being carried on subcarriers of a high-frequency channel, and the high-frequency physical layer signal being obtained by replicating a basic physical layer signal M times. The basic physical layer signal is replicated M times for transmission, thereby reducing the transmission rate of the high-frequency physical layer signal and making the high-frequency physical layer signal suitable for transmission in scenarios with a low signal-to-noise ratio.

The application discloses an ultrasonic ranging method, an ultrasonic ranging system, a storage medium and a program product, and relates to the technical field of intelligent sensing. The method comprises the following steps: a sending end generates a plurality of candidate sequence codes in a time domain based on orthogonal symbols, the candidate sequence codes are generated by at least one of the following methods: time domain arrangement, adjustment of symbol intervals, combination, random arrangement and adjustment of symbol intervals, a target sequence code is selected from the candidate sequence codes, and the target sequence code is shared with a receiving end; a target ultrasonic signal containing the target sequence code is broadcast to the receiving end; after receiving the target ultrasonic signal returned by the receiving end, the distance between the sending end and the receiving end is determined; the receiving end receives at least one ultrasonic signal; when a target ultrasonic signal matched with the target sequence code is identified, a transmission channel of the target ultrasonic signal is subjected to collision detection; if there is no collision in the current channel or the collision in the channel is solved, the receiving end and the sending end are subjected to ranging based on the target ultrasonic signal.

A terminal according to one aspect of the present disclosure comprises: a reception unit that receives downlink control information for scheduling at least one of a downlink shared channel and an uplink shared channel together with a demodulation reference signal (DMRS) to which a length-4 frequency-domain orthogonal cover code (FD-OCC) is applied; and a control unit that controls reception of the downlink shared channel and transmission of the uplink shared channel. The terminal supports the application of different FD-OCC codes to a DMRS for the downlink shared channel and a DMRS for the uplink shared channel.

A data transmission method and a communication apparatus are provided. The data transmission method includes: A terminal device and a network device each determine a first sequence number of the terminal device on a first time-frequency resource, and determine, from a signature sequence set, a first signature sequence corresponding to the first sequence number, where a difference between quantities of sequence numbers corresponding to any two signature sequences in the signature sequence set is less than or equal to a first value, and sequence numbers corresponding to any two signature sequences in the signature sequence set are different. The terminal device sends data on the first time-frequency resource by using the first signature sequence. Correspondingly, the network device receives the data on the first time-frequency resource. The network device decodes the data based on the first signature sequence. According to embodiments of this application, a centralized collision of signature sequences can be avoided, and a degree of distinguishing between terminal devices by using the signature sequences can be improved.

This application provides a communication method, a communication device, a computer-readable storage medium, a chip, and a computer program product. The communication method includes: determining a first matrix based on a quantity of active terminal devices in a plurality of terminal devices or a quantity of the plurality of terminal devices. The communication method further includes: determining a first sequence based on the first matrix, a probability distribution of to-be-sent data of the plurality of terminal devices, and a predetermined length of the first sequence associated with the plurality of terminal devices. The communication method further includes: performing spreading on modulated data by using the first sequence. The communication method includes: sending spread modulated data to a network device. In the method, sparseness of the active terminal device is used, so that channel decoding complexity can be reduced in a scenario in which the quantity of potential terminal devices is large and the quantity of active terminal devices is small.

In a wireless communication system, including transmitter entities, digitally controllable scattering (DCS) entities, a receiver entity, and a control entity, the receiver entity can identify, by respectively transmitting or scattering a signal, which of the transmitter entities and which of the DCS entities contributed to a receive signal received at the receiver entity over one or more direct links and / or one or more indirect links. The identification by the receiver entity is based on the use of Zadoff-Chu (ZC) identities determining ZC sequences, where unique ZC identities are used at the transmitter entities for transmitting signals and at the DCS entities for scattering impinging signals.

The present disclosure provides a backscatter communication method, a communication device, and a storage medium, the backscatter communication method including the steps of obtaining a first sequence, the first sequence including at least one zero element and / or at least one non-zero element, and performing backscatter communication based on the first sequence.

A wireless device is configured to produce a signal in a time slot of a frame, wherein the time slots have variable lengths. The signal having a first portion and a second portion, wherein the first portion and the second portion are located in defined time regions in the slot. Further, the first portion having data and a multiplexed first pilot, wherein the multiplexed first pilot is derived from a pseudo random sequence, the second portion having a pilot sequence and a cyclic prefix. The wireless device transmits the produced signal in the time slot.

Provided is a sequence allocation method capable of reducing inter-cell interference of a reference signal when a ZC sequence is used as the reference signal in a mobile communication system. In the sequence allocation method, R×M sequences specified by a ZC sequence number r (r=1 to R) and a cyclic shift sequence number m (m=1 to M) are divided into a plurality of sequence groups X (X=1 to R) in accordance with the transmission band width of the reference signal, so that the ZC sequence is allocated to each cell in each sequence group unit. When it is assumed that R=9 and M=6, the number of sequences is 54. Each of the sequence groups is formed by two sequences. Accordingly, the number of sequence groups is 27. The 27 types of sequence groups are allocated to each cell.