44results about "Multiplex multicode" patented technology

A terminal according to one aspect of the present disclosure includes a receiving section that receives an antenna port indication when at least one of a demodulation reference signal (DMRS) type and a maximum length of the DMRS to be configured is not 1, and a control section that controls uplink (UL) transmission corresponding to two codewords, the UL transmission using a number of layers greater than four, based on the antenna port indication. According to one aspect of the present disclosure, UL transmission with the number of layers greater than four can be appropriately controlled.

A quadrature amplitude modulation (QAM) transmitter separates an input digital level into I and Q components. In a variation, a QAM transmitter uses every other input digital level as an I or Q component. A QAM receiver receives a QAM modulated signal and outputs digital levels. A QAM transmitter for transmitting analog levels uses a pair of input analog levels as the I and Q components. A QAM receiver receives a QAM modulated signal and outputs analog levels. The digital and analog input levels are produced by encoding N samples using L orthogonal codes.

A non-coherent communication system in which a transmitting device does not transmit a pilot / DMRS, such that the receiving device may be configured to determine or decode the information received from the transmitting device without performing any channel estimation. An apparatus for wireless communication at a receiving device receives, from a transmitting device, a non-coherent signal having data. The apparatus may determine data from the received signal without performing a channel estimation. In another aspect, an apparatus at a transmitting device divides an information payload including a set of bits into multiple subsets of bits, maps each of the multiple subsets of bits into a respective sequence of complex symbols, generates a non-coherent transmission signal based on the respective sequences, and transmits the non-coherent transmission signal to a receiving device.

A terminal device obtains coding information that includes a first information bit and a second information bit. The terminal device selects, based on the first information bit, K groups from a codebook having L groups as activation groups, where both L and K are positive integers, and K is less than L. The terminal device then selects, based on the second information bit, a sequence from each of the activation groups as an activation sequence, and obtains a first sequence by superimposing the K activation sequences.

The present disclosure relates to a method performed by a user equipment in a wireless communication system and an apparatus supporting the method, and more particularly to a method and an apparatus supporting the method, the method comprising the following steps: obtaining a message A related to a random access procedure; sending the message A; and receiving a message B related to the random access procedure in response to the message A, wherein the message A includes a physical random access channel (PRACH) preamble and a physical uplink shared channel (PUSCH); sending the PUSCH based on the received information related to the PUSCH configuration for the message A; based on the information related to the PUSCH configuration including information related to an indication of a code division multiplexing (CDM) group of a demodulation reference signal (DMRS) for the PUSCH, the CDM group is set to a group indicated by information related to the indication of the CDM group among two predetermined groups; performing communication after the random access procedure; based on the communication, receiving a physical downlink shared channel (PDSCH); and based on discontinuous reception (DRX) being set, monitoring a physical downlink control channel (PDCCH) for the PDSCH within an on-duration related to the DRX.

A wireless transmitter and antenna are provided on the transmit side, and a receiver and an antenna are provided on the receive side. A transmitter receives samples from a video source via media signals, permutes the input samples into input vectors, and encodes each input vector with reference to a set of orthogonal codes to produce analog SSVT signals per encoder. The wireless transmitter modulates the SSVT signals generated by the SSVT transmitter onto one or more carrier frequency signals. Once modulated, the carrier frequency signals are then broadcast by the antenna. On the receive side, the antenna receives the broadcast and provides the modulated carrier signals to the wireless receiver. In response, the wireless receiver demodulates the carrier frequency signals and produces the corresponding analog SSVT signals, which are then decoded into reconstructions of the input media samples into output vectors, which are then permuted into output samples that are sent to a video sink for display.

Provided is a terminal according to one embodiment of the present disclosure characterized to have: a receiving unit that receives an antenna port instruction in a case where a set demodulation reference signal (DMRS) type and / or the maximum length of the DMRS is not 1; and a control unit that, on the basis of the antenna port instruction, controls uplink (UL) transmissions which correspond to two codewords and use the number of layers greater than four. Said one embodiment makes it possible to suitably control UL transmission with the number of layers greater than four.

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.

A multi-codeword transmission method and apparatus is provided that allows a terminal device to correctly demodulate data in a multi-codeword transmission scenario. The method includes generating, by a network device, downlink control information corresponding to each of a plurality of codewords to be transmitted to a terminal device. The downlink control information corresponding to each codeword includes at least one of a physical downlink shared channel resource element mapping, a quasi-co-location indicator, one or more antenna ports, a scrambling identifier, and a number of layers. The method further includes transmitting, by the network device, the downlink control information corresponding to the plurality of codewords to the terminal device.

A communication apparatus includes: storing means for storing information indicating a first base set including a first base sequence to an N-th base sequence; shifting means for generating a first shift sequence to an N-th shift sequence by determining a shift amount based on transmission data, and cyclic shifting an n-th base sequence (n being an integer from 1 to N) by the shift amount; holding means for holding timing information indicating transmission timings of sequences; and transmitting means for transmitting each shift sequence according to the timing information, wherein the first base sequence to the N-th base sequence satisfy a first condition of: a total across the first base sequence to the N-th base sequence of correlation values of autocorrelation is not 0 when a shift amount is 0, and a total across the first base sequence to the N-th base sequence of correlation values of autocorrelation is 0 when a shift amount is different from 0 used in data transmission.

The disclosed techniques allow for transmitting a signal stream from a sender to a receiver in an environment including multiple senders and receivers. The technique for the sender decomposes a data stream from the sender into multiple substreams, encodes a substream by a codeword, further superimposes multiple codewords to form a signal stream in an asynchronous manner, and transmits the signal stream to the receiver. A codeword can span over multiple blocks. The receiver receives a first codeword stream from a first sender, receives a second codeword stream from a second sender, the two codeword streams may be received at the same time as one signal, and decodes the first codeword stream and second codeword stream over a sliding window of multiple blocks.

Techniques are provided for transmitting, receiving, and adjusting pilot sequences and for evaluating channel characteristics. The pilot signal may include a pilot sequence, which includes at least one first set of equally spaced symbols (S A ) and at least one second set of equally spaced symbols (S C ) and at least one second set of equally spaced symbols (S AC ) symbols are arranged in at least one first set of equally spaced symbols (S A At least one second set of equally spaced symbols (S C ) and at least one first set of equally spaced symbols (S ) are arranged such that each first set of equally spaced symbols represents a respective first code. A ), and at least one second set of equally spaced symbols (S E Each first code and each second code can be selected from the set of codes (S A , S C ) matches at least one other code (S E , S G ) may be selected from a set of codes that are orthogonal to the code transmitted by the transmitter. The same technique of transmitting a sequence using a code that is orthogonal to the code transmitted by the transmitter may be implemented in another transmitter.

This application discloses a multi-codeword transmission method and an apparatus. The method includes: generating, by a network device, downlink control information corresponding to each of a plurality of code words to be sent to a terminal device, where the downlink control information corresponding to each code word includes at least one of the following: a physical downlink shared channel resource element mapping and quasi-co-location indicator, and an antenna port(s), scrambling identity and number of layers; and sending, by the network device, downlink control information corresponding to the plurality of code words to the terminal device. Corresponding apparatuses are further disclosed. According to the technical solutions of this application, the network device generates the downlink control information corresponding to each of the plurality of code words to be sent to the terminal device, and the terminal device may demodulate data for the plurality of code words based on downlink control information corresponding to the plurality of code words. This ensures that the terminal device correctly demodulates data in a multi-codeword transmission scenario.

This application provides a communication method and a related apparatus, to mitigate interference between codewords of different lengths and reduce complexity of a receiver. The method includes: A terminal device spreads to-be-transmitted data based on a target codeword to obtain spread data, where the target codeword is determined from K codebooks, each of the K codebooks includes at least one codeword, a codeword length is the same within each codebook, codeword lengths of any two of the K codebooks are different, a codeword length of any one of remaining (K-1) codebooks other than a first codebook among the K codebooks is a positive integer multiple of a codeword length of the first codebook, the first codebook is a codebook whose codeword length is the shortest among the K codebooks, and K is an integer greater than 1; and the terminal device sends the spread data to a network device, and the network device despreads the spread data based on the target codeword.

Methods, systems, and devices for satellite operations are described. A satellite communications system may include a transmitter that applies multiple spreading codes to a data signal to obtain multiple spread data signals. The transmitter may transmit the multiple spread data signals from multiple antenna elements in a composite signal. The satellite communications system may also include a receiver that receives the composite signal and applies multiple despreading codes to the composite signal to obtain multiple despread data signals. The receiver may combine the multiple despread data signals to obtain a combined data signal that corresponds to the data signal processed by the transmitter. To combine the multiple despread data signals, the receiver may estimate coefficients for each of the despread data signals.

The invention discloses a communication method and device, a chip, a chip module and a storage medium. The terminal equipment determines K data blocks to be sent, wherein K is a positive integer greater than or equal to 1; n times of resource mapping is carried out on each data block in the K data blocks, the data blocks are mapped to one time unit each time, the total number of the time units to which the N times of resource mapping is carried out for the K data blocks is L, L = K * N / M, and orthogonal cover code (OCC) sequences adopted by the M data blocks mapped to the same time unit are different, m is the number of OCC sequences adopted by uplink transmission, and N is the number of repetition times of code division multiplexing adopted by uplink transmission; and transmitting the corresponding data block on the mapped time unit. Under the condition of sending the same data volume, not only can the occupation of time domain resources be reduced, but also the uplink capacity can be improved, and the communication efficiency can be improved.

Aspects of the present disclosure relate to wireless communication and, more particularly, to techniques for allowing coexistence of legacy and non-legacy PUCCH formats. Example methods generally include: generating a first orthogonal sequence for a first payload of a physical uplink control channel (PUCCH) to be transmitted; generating a second orthogonal sequence for a second payload of the PUCCH to be transmitted; mapping the first orthogonal sequence to a first virtual resource set and mapping the second orthogonal sequence to a second virtual resource set; mapping the first virtual resource set to a first physical resource set and mapping the second virtual resource set to a second physical resource set; and transmitting the first payload and the second payload for the PUCCH on the first physical resource set and the second physical resource set.

Methods, systems, and devices for satellite operations are described. A satellite communications system may include a transmitter that applies multiple spreading codes to a data signal to obtain multiple spread data signals. The transmitter may transmit the multiple spread data signals from multiple antenna elements in a composite signal. The satellite communications system may also include a receiver that receives the composite signal and applies multiple despreading codes to the composite signal to obtain multiple despread data signals. The receiver may combine the multiple despread data signals to obtain a combined data signal that corresponds to the data signal processed by the transmitter. To combine the multiple despread data signals, the receiver may estimate coefficients for each of the despread data signals.

According to an embodiment of the present invention, a method and apparatus for sending and receiving signals in a wireless communication system include: iteratively mapping a PUCCH sequence to each resource block (RB) within an interlace; and sending the PUCCH on the interlace, wherein a phase shift (PS) value of the PUCCH sequence may be changed based on an RB index of each RB.

Methods, systems, and devices for satellite operation are described. A satellite communications system may include a transmitter that applies multiple spreading codes to a data signal to obtain multiple spread data signals. The transmitter may transmit the multiple spread data signals from multiple antenna elements in a composite signal. The satellite communications system may also include a receiver that receives the composite signal and applies multiple despreading codes to the composite signal to obtain multiple despread data signals. The receiver may combine the multiple despread data signals to obtain a combined data signal corresponding to the data signal processed by the transmitter. To combine the multiple despread data signals, the receiver may estimate coefficients for each of the despread data signals.

ABSTRACT: A method performed by a user equipment, UE, in a wireless communication system is provided, which comprises: receiving configuration information related to a message A comprising a physical random access channel, PRACH, preamble and a physical uplink shared channel, PUSCH; performing a 2-step random access procedure; after performing the 2-step random access procedure, monitoring a physical downlink control channel, PDCCH, in an on duration based on configured discontinuous reception, DRX; and receiving a physical downlink shared channel, PDSCH, based on the PDCCH.

The examples set forth herein describe methods, devices, and systems in which a wireless communication device that is a node of a vehicle ad-hoc network (VANET) spreads a reservation channel message with a spreading code, according to a codedivision multiple access (CDMA) scheme. The wireless communication device transmits a reservation channel transmission to at least one other wireless communication device, which is another node of the VANET, via time-frequency resources selected from a reservation channel resource pool. The reservation channel transmission contains the spread reservation channel message. In some examples, multiple reservation channel messages may be included in a single reservation channel transmission. In these examples, each reservation channel message is spread with a different orthogonal code before combining the reservation channel messages and spreading the combined reservation channel messages with a spreading code, according to a CDMA scheme.

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.

The present invention discloses a method at a network element in a wireless communication system. The method comprises transmitting, to a user equipment, a downlink message using orthogonal frequency division multiplexing, OFDM, symbols, wherein the downlink message comprises a first control channel element and a second control channel element. A location of the first control channel element is associated with a first index, and a second index is associated with the first index. An indicator of a first orthogonal resource is associated with the first index, and an indicator of a second orthogonal resource is associated with the second index. The second control channel element is associated with the second orthogonal resource. The method comprises receiving an uplink transmission from the user equipment; despreading the received uplink transmission into a first modulated message using the first orthogonal resource, and, despreading the received uplink transmission into a second modulated message using the second orthogonal resource.

A communication apparatus includes: one or more memory devices configured to store information indicating a first base set including a first base sequence to an N-th base sequence; and one or more processors configured to: generate a first shift sequence to an N-th shift sequence by determining a shift amount based on transmission data, and cyclic shifting an n-th base sequence (n being an integer from 1 to N) by the shift amount; and transmit the n-th shift sequence, wherein the n-th base sequence satisfy a first condition of: a total across the first base sequence to the N-th base sequence of correlation values of autocorrelation is not 0 when a shift amount is 0, and is 0 when a shift amount is different from 0 used in data transmission.

The present disclosure relates to a method carried out by a user equipment in a wireless communication system and a device supporting same and, more particularly, to a method and a device supporting same, the method comprising the steps of: obtaining a message A related to a random access procedure; transmitting the message A; and in response to the message A, receiving a message B related to the random access procedure, wherein: the message A includes a physical random access channel (PRACH) preamble and a physical uplink shared channel (PUSCH); the PUSCH is transmitted on the basis of information related to a PUSCH configuration for the message A received; on the basis that the information related to the PUSCH configuration includes information related to the indication of a code division multiplexing (CDM) group for a demodulation reference signal (DMRS) for the PUSCH, the CDM group is set to be a group indicated by information related to the indication of the CDM group among two preset groups; after the random access procedure, communication is carried out; on the basis of the communication, a physical downlink shared channel (PDSCH) is received; and on the basis that discontinuous reception (DRX) is set, a physical downlink control channel (PDCCH) for the PDSCH is monitored within an on duration related to the DRX.

The embodiment of the invention relates to multiplexing of signals in a communication system. A first communication device (100) acquires a vector b including M integer value information symbols in a set {0, 1,..., q-1], where q = 2Q, and Q is a positive integer, and acquires an N * M matrix C including symbols in the set {0, 1,..., q-1}, where N is a positive integer, satisfying M < = N. And multiplying the matrix C by the vector b, and performing modulus q to obtain a vector y comprising N transmission symbols, each transmission symbol in the vector y being associated with one of q signals. An association signal for each transmission symbol in the vector y is transmitted to one or more receivers (510). A second communication device (300) receives N signals (510), where each signal is associated with a symbol in a set [0, 1,..., q-1], where q = 2Q, and Q is a positive integer. The second communication device (300) determines M integer value information symbols from N association symbols based on an N * M matrix C or a modulo inverse thereof, where the matrix C and the modulo inverse thereof comprise symbols in the set [0, 1,..., q-1], where N is a positive integer, satisfying M < = N. The invention further relates to a corresponding method and to a computer program.

This application provides a communication method and a related apparatus, to mitigate interference between codewords of different lengths and reduce complexity of a receiver. The method includes: A terminal device spreads to-be-transmitted data based on a target codeword to obtain spread data, where the target codeword is determined from K codebooks, each of the K codebooks includes at least one codeword, a codeword length is the same within each codebook, codeword lengths of any two of the K codebooks are different, a codeword length of any one of remaining (K-1) codebooks other than a first codebook among the K codebooks is a positive integer multiple of a codeword length of the first codebook, the first codebook is a codebook whose codeword length is the shortest among the K codebooks, and K is an integer greater than 1; and the terminal device sends the spread data to a network device, and the network device despreads the spread data based on the target codeword.

An optical communication method using deep learning in a code-division multiple access (CDMA) scheme may include obtaining an image of an optical signal from a light source and applying a first model trained to identify a location of the light source to detect the light source in the image. The method may also include detecting a preamble of an on-off keying (OOK) modulated signal from a pulse signal generated based on the identified light source using a second model trained to detect preambles in received signals, to decode the OOK modulated signal for a first user device by applying a first pseudo-random noise (PN) code. The method may further include determining a start position of an orthogonal frequency division multiplexing (OFDM) frame in an OFDM modulated signal from the pulse signal, to decode the OFDM modulated signal by applying a first Walsh code.

This communication device comprises: a storage means for storing information indicating a first basic set including a first basic sequence to an Nth basic sequence; a shifting means for generating a first shift sequence to an Nth shift sequence by determining a shift amount on the basis of transmission data and cyclically shifting the nth basic sequence (n is an integer from 1 to N) by the shift amount; a holding means for holding timing information indicating transmission timing of the series; and a transmitting means for transmitting each shift sequence according to the timing information, wherein the first basic sequence to the Nth basic sequence satisfy a first condition that the sum of the correlation values of autocorrelation from the first basic sequence to the Nth basic sequence when the shift amount is 0 is different from 0, and the sum of correlation values of autocorrelation from the first basic sequence to the Nth basic sequence with the shift amount different from 0 used for data transmission is 0.