158 results about "Modulation order" patented technology

Methods, systems, and devices for wireless communications are described. A wireless device may perform a probabilistic shaping procedure using a shaping rate that is selected in accordance with a rule associated with a target spectral efficiency value, a modulation order, or both. Similarly, the wireless device may perform a channel coding procedure whose coding rate is selected in accordance with the rule. The rule may correspond to a relationship between the coding rate and the shaping rate. In some cases, the wireless device may select the shaping rate and the coding rate to be predefined values based on a target spectral efficiency value. In some examples, the wireless device may select the shaping rate and the coding rate based on a threshold coding rate, a quantity of punctured nodes used in the channel coding procedure, a quantity of layers corresponding to a multi-layer transmission, or any combination thereof.

The invention discloses a covert communication optimization method based on deep reinforcement learning under limited character input, and belongs to the technical field of wireless communication. According to the method, an optimization problem which takes the minimum average bit error rate as a target function and takes hidden requirements, power and the like as constraints is constructed on a hidden communication model of a transmitting end, a receiving end, an intelligent reflecting surface and a monitor. Firstly, the bit error rate of a receiving end is given, the detection performance of a monitor is analyzed, and the KL divergence upper bound and the corresponding hidden constraint are deduced. The objective function and the constraint set of the constructed problem are non-convex, the optimization problem is trained and solved by constructing the optimization problem into a deep reinforcement learning model, the modulation order which is difficult to optimize by a traditional algorithm is optimized by using the advantages of deep reinforcement learning, a deep deterministic strategy gradient algorithm is selected to train the model, and then the error rate is minimized. And the covert communication performance is improved.

A method and a device for distributed resource unit (DRU) tone plan-based transmission or reception in a wireless LAN system are disclosed. The method according to one embodiment of the present disclosure may comprise steps in which a first station (STA): receives, from a second STA, a trigger frame including information related to a DRU; and transmits, to a second STA, a TB PPDU based on the DRU. Here, the trigger frame can include information related to application of different modulation orders or the same modulation order to a plurality of spatial streams for the DRU.

A method for a user equipment (UE) includes receiving first information for a first physical downlink control channel (PDCCH) search space set and receiving second information for a second PDCCH search space set. The first PDCCH search space set is a UE-specific, includes first PDCCH candidates associated with a first modulation order, and second PDCCH candidates associated with a second modulation order. The second PDCCH search space set is not UE-specific and includes only third PDCCH candidates associated with the first modulation order. The method further includes determining a first, second, and third PDCCH candidate from the first, second, and third PDCCH candidates, respectively. The method further includes receiving a first and second PDCCH in the first and second PDCCH candidate based on the first and second modulation order, respectively, and receiving a third PDCCH in the third PDCCH candidate based on the first modulation order.

Provided in the present disclosure are a communication method, device and system, and a storage medium. The method comprises: when a modulation scheme is a first modulation scheme, receiving a physical downlink channel sent by a network device, wherein the modulation order of the first modulation scheme is greater than or equal to 12; performing channel quality assessment on the physical downlink channel; determining, from among at least one first channel quality indicator (CQI) index comprised in a CQI table, one first CQI index corresponding to a channel quality assessment result, wherein the CQI table supports the first modulation scheme and various types of second modulation schemes, the modulation order of any second modulation scheme is less than 12, and any first CQI index corresponds to the first modulation scheme; and sending the determined first CQI index to the network device. The present disclosure supports a high-order first modulation scheme and also significantly increases the service rate, thereby achieving high availability.

Disclosed are systems and techniques for wireless communications. For instance, a network entity may obtain a first plurality of bits from a first buffer, wherein a start position for obtaining the first plurality of bits from the first buffer is based on a redundancy version order. In some cases, the network entity may determine, based on a modulation order and a probability distribution associated with the first plurality of bits, at least one scaling factor for constellation mapping the first plurality of bits. In some examples, the network entity may map, based on the at least one scaling factor, the first plurality of bits to one or more symbols.

Certain aspects of the present disclosure provide a method for wireless communication at a wireless node. The wireless node may decide whether to perform probabilistic shaping based on unit-level shaping or multi-bit-level shaping on a bit sequence of the signal. The sequence of bits includes a set of bits. The wireless node may make the decision based on a modulation order and / or a modulation and coding scheme (MCS) index value. The wireless node may perform the probabilistic shaping on the bit sequence according to the decision.

Methods and procedures are disclosed herein for applying unequal modulation over spatial streams and / or frequency segments. A STA may determine, for each spatial stream of a plurality of spatial streams, a plurality of frequency subblocks, each frequency subblock including one or more respective resource units (RUs) and an associated modulation order, and each RU including a respective number of occupied data tones. The STA may parse a bit sequence corresponding to an OFDM symbol into the plurality of spatial streams. For each spatial stream, the STA may allocate, for each frequency subblock, a respective number of consecutive bits of the OFDM symbol that corresponds to the associated modulation order of the frequency subblock and the respective number of occupied data tones in the RUs of the frequency subblock. The STA may transmit the plurality of spatial streams according to the allocation over the occupied data tones.

This user equipment can determine a PUCCH resource for the transmission of uplink control information (UCI), and acquire modulation symbols of a second modulation order higher than a first modulation order according to the UCI on the basis that a coding rate R calculated on the basis of the first modulation order and N resource blocks exceeds a maximum coding rate Rmax configured for the PUCCH resource.

The invention relates to the field of laser communication, and provides a parallel low-complexity frequency offset compensation method, device, equipment and medium, and the method comprises the steps: calculating the M-power variance of N M-PSK signals which are input in parallel, and carrying out the first frequency offset compensation of an original signal through the difference result of N points at intervals; the M-PSK signal is a PSK signal of which the modulation order is M; and solving an N-point M-power spectrum for the signal after the first frequency offset compensation, and performing second frequency offset compensation for the signal after the first frequency offset compensation by using the spectral line position of the M-power spectrum. The two-stage frequency offset compensation method provided by the invention has the characteristics of high dynamic range, low resource consumption, no need of data assistance and support of burst signal processing, and is particularly suitable for a frequency offset compensation scene in a high-speed laser communication link.

The application provides a method for controlling uplink throughput of a UAV satellite base station and the UAV satellite base station, and belongs to the technical field of communication. In the method for controlling uplink throughput of the UAV satellite base station, the UAV satellite base station analyzes modulation capability information sent by a UE, obtains a first modulation order and a second modulation order supported by the UE in different communication frequency bands, and combines a target communication frequency band currently located by the UE and a power switching type of the UE to perform optimized scheduling on a subsequent second uplink subframe, so that stable signal quality and throughput are maintained when the transmission power of the UE changes, the reduction of the throughput caused by the unstable error vector magnitude when the power switching is determined is effectively alleviated, the overall performance of the communication system is improved, and the waste of spectrum resources is reduced.

A method for a user equipment (UE) includes receiving first information for a first physical downlink control channel (PDCCH) search space set and receiving second information for a second PDCCH search space set. The first PDCCH search space set is a UE-specific, includes first PDCCH candidates associated with a first modulation order, and second PDCCH candidates associated with a second modulation order. The second PDCCH search space set is not UE-specific and includes only third PDCCH candidates associated with the first modulation order. The method further includes determining a first, second, and third PDCCH candidate from the first, second, and third PDCCH candidates, respectively. The method further includes receiving a first and second PDCCH in the first and second PDCCH candidate based on the first and second modulation order, respectively, and receiving a third PDCCH in the third PDCCH candidate based on the first modulation order.

An apparatus includes at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: determine a modulation and coding scheme (MCS) based on a spectral efficiency and a number of at least one transmission layer selected for a transmission of downlink data; and transmit, to a user equipment, the downlink data with the number of at least one transmission layer using the determined MCS.

Transfer learning (TL)-based systems, methods, and devices are provided for neural network and / or neuromorphic network transmitters / receivers with a set of desired modulation orders. In one aspect, a source system trains a full neural net modulation / demodulation model, from which one or more upper / output layers are removed, and the remaining base layers are transferred into a target system. A set of one or more upper / output layers are generated for the set of desired modulation orders, then transferred into, and trained in, the target system. The target system may store the transferred base layers and the trained set of one or more upper / output layers for the set of desired modulation orders, and use them to modulate / demodulate any transmission having one of the set of desired modulation orders.

The application relates to the technical field of digital information transmission, and discloses a cross-domain fusion communication and intelligent scheduling method, which comprises the following steps: constructing a semantic mapping topological structure of a heterogeneous protocol association relationship, converting a heterogeneous protocol message into a semantic association structure, and completing protocol analysis and data transmission according to message mapping, field mapping and load segmentation characteristics; obtaining a monitoring variable representing a local channel state of a sending end, using an adaptive adjustment module to realize channel transmission characteristic inference based on the local implicit state, generating modulation order and coding rate instructions, and reducing real-time dependence on remote feedback information; and coupling time slot allocation parameters and link capacity decision logic, and driving resource changes according to node transceiving rate differences. The application overcomes the defect of high time delay link feedback lag through a local implicit state inference mechanism, effectively suppresses modulation parameter oscillation, and guarantees the data transmission continuity of a heterogeneous network under load fluctuation.

The application relates to the technical field of wireless communication, and discloses a wireless communication signal transmission system and method based on adaptive modulation, which comprises a likelihood ratio extraction module, a queue monitoring module, a parameter adaptive control module and a constellation mapping module; the likelihood ratio extraction module acquires a log-likelihood ratio sequence; the queue monitoring module determines a buffer queue depth; the parameter adaptive control module adjusts a sliding integral register accumulation period according to the buffer queue depth, and uses the sliding integral register to implement time domain integral processing on the log-likelihood ratio sequence to generate a channel quality representation parameter, and then determines a target modulation order; the application cross-layer correlates the data backlog level with the baseband statistical time scale, reduces the dependence on explicit channel state information feedback, reduces control signaling overhead, smoothes transient impulse noise interference through a dynamic accumulation mechanism, prevents buffer overflow, and improves the transmission net throughput rate of digital information in a high concurrency environment.

The invention discloses a signal transmission method and device, a terminal, network side equipment and a medium, and belongs to the technical field of communication, and the signal transmission method comprises the steps that the terminal sends a first signal based on a first parameter; wherein the first signal corresponds to the first channel, and the first parameter is related to at least one of the following items: the type of the first channel, the resource allocation position of the first channel, the sending power of the first channel, the modulation order of the first channel, the waveform of the first channel, the PAPR of the first channel, the type of the first signal, the number of ports of the first signal, and the number of symbols of the first signal; a sequence of the first signal, a PAPR of the first signal.

The application provides a modulation method and a communication device, the modulation method comprising: N MCS indexes corresponding to a first modulation order Q m , the N MCS indexes corresponding to T constellation sets, N being greater than T, that is, using the same constellation set under different MCS indexes corresponding to the same modulation order Q m . Through the method of the embodiment of the application, the number of non-uniform constellation sets required to be supported by the modulation and coding mode is reduced, and the complexity of modulation and demodulation is reduced.

Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) to communicate using π / 2 binary phase shift keying (BPSK) modulation according to extended coding rates. In some cases, the UE may receive configuration information that supports modulation orders for π / 2 BPSK modulation extended to include modulation orders otherwise only configured for quadrature phase shift keying (QPSK) modulation. Further, the UE may support dynamic switching between π / 2 BPSK and QPSK modulation. For example, the UE may transmit or receive control signaling indicating a modulation order for an uplink transmission, where the UE or a network entity may determine which modulation scheme and order to use according to communication parameters associated with the uplink transmission, the UE, or both.

This disclosure relates to a communication method, a terminal, a network device, and a storage medium. The communication method includes: a terminal receiving first information, the first information indicating a first modulation and coding scheme, the first modulation and coding scheme belonging to a first set of modulation and coding schemes, the first set of modulation and coding schemes including multiple modulation and coding schemes, and the multiple modulation and coding schemes including at least one modulation and coding scheme with a modulation order of 12. This disclosure improves transmission rate.

Methods, systems, and devices for wireless communications are described. Techniques described herein support encoding and transmitting of data carrying reference signals (DCRSs according to a lower modulation order and data according to a higher modulation order. A transmitting device may write data bits and DCRS bits into a bitstream according to an interleaving table (e.g., a systematic bit priority mapping (SBPM) interleaver or table). In some examples, the transmitting device may utilize a sub-constellation of the higher modulation order constellation for transmitting the DCRS bits via DCRS REs. In some examples, the transmitting device may skip (e.g., leave unoccupied) entries in the interleaving table corresponding to the LSBs of a DCRS column. In some examples, the transmitting device may write DCRS bits into the bitstream according to a first interleaving table, and may write data bits into the bitstream according to a second interleaving table.

The application discloses a method and system for calculating the physical bit number of SSB of a 5G NR network, and belongs to the technical field of mobile communication. The method comprises the following steps: determining the time domain distribution pattern and the possible position of the starting time domain symbol of SSB according to the subcarrier spacing, carrier frequency, duplex mode and spectrum sharing access scene of SSB, then determining the number of candidate SSB indexes, and combining the high-level protocol parameter ssb-PositionsInBurst to calculate the number of time domain symbols occupied by the actual transmission of SSB; determining the number of frequency domain subcarriers occupied by SSB according to the offset of the starting subcarrier of SSB and the starting subcarrier of the common resource block 0; and finally calculating the total number of time-frequency resource elements and multiplying the modulation order to obtain the physical bit number of SSB. The application can quickly and accurately calculate the physical bit number of SSB based on the physical layer parameters without implementing a complex protocol signal processing algorithm, and significantly improves the efficiency of SSB data generation and test work.

Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) to communicate usingπ2binary phase shift keying (BPSK) modulation according to extended coding rates. In some cases, the UE may receive configuration information that supports modulation orders forπ2 ⁢BPSKmodulation extended to include modulation orders otherwise only configured for quadrature phase shift keying (QPSK) modulation. Further, the UE may support dynamic switching betweenπ2 ⁢BPSKand QPSK modulation. For example, the UE may transmit or receive control signaling indicating a modulation order for an uplink transmission, where the UE or a network entity may determine which modulation scheme and order to use according to communication parameters associated with the uplink transmission, the UE, or both.

This application provides communication methods and apparatuses. An example method includes: receiving first indication information, wherein the first indication information indicates a first modulation coding scheme; and determining, from a first modulation coding scheme set, a first modulation coding scheme indicated by the first indication information. The first modulation coding scheme set comprises modulation coding schemes whose modulation orders are respectively 2, 4, 6, 8 and 10. A quantity of modulation coding schemes whose modulation order is 10 is 4. Coding rates corresponding to 2 of the 4 modulation coding schemes whose modulation orders are 10 comprise 853 / 1024 and 948 / 1024.

Embodiments of the invention relate to first communication device (100) and a second communication device (300) for waveform switching for data transmissions. Therefore, the first communication device (100) transmits a first control message (510) to the second communication device (300). The first control message (510) indicates at least one association between a waveform and at least one of a modulation order and a number of resources for a data transmission (540). The first communication device (100) thereafter receives a second control message (520) from the second communication device (300), and the second control message (520) indicates at least one of a first modulation order and a first number of resources for the data transmission (540). The first communication device (100) uses a first waveform associated with at least one of the first modulation order and the first number of resources for performing the data transmission (540) to the second communication device (300). Furthermore, embodiments of the invention also relate to corresponding methods and a computer program.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication that indicates a codeword across a plurality of flexible spectrum integration subbands (FSI-SBs) for a transport block and a first plurality of modulation orders with a first single effective coding rate. The UE may communicate the transport block over the plurality of FSI-SBs with the first single effective coding rate. Numerous other aspects are described.

Provided are a method and an apparatus for transmitting data in a wireless communication system. Logical channels or data streams are divided into two groups according to QoS characteristics and sorted in ascending order of the target MCS. The logical channels or data streams arranged in ascending order of the target MCS are transmitted through a plurality of shared channels scheduled by one DCI. The MCSs of the two groups are one of a first type MCS index indicating both modulation order information and code rate information and a second type MCS index indicating modulation order information, and are limited to the same type of MCS indexes.

The invention discloses a communication method of a power domain non-orthogonal multiple access system based on a symmetric Hamming distance constellation and a related device, and the method comprises the steps: carrying out the coding and bit interleaving processing of information bit sequences of two users, and obtaining corresponding bit interleaving sequences; modulating the bit interleaving sequence to obtain a corresponding modulation symbol sequence, and determining transmission power; based on the symmetric Hamming distance, determining a mutual constellation arrangement function according to the modulation orders of the modulation symbol sequences of the two users; based on a mutual constellation arrangement function, performing mapping superposition according to the modulation symbol sequence and the transmission power through a joint constellation mapper to obtain a superposed symbol sequence; transmitting the superposed symbol sequence through a transmission channel to obtain a received signal; and decoding the received signal by adopting an iterative soft demodulation and decoding mode, and recovering the decoding bit sequences of the first user and the second user. According to the method, the correlation between the users is established based on the mutual constellation arrangement function to reduce the interference between different user constellations.

To provide a radio communication apparatus and a communication method capable of transmitting control information indicating a modulation system for each spatial stream.SOLUTION: The wireless communication apparatus 400 includes a communication control unit 401 configured to generate first control information, and a wireless transmission unit 403 configured to transmit the first control information, wherein the first control information includes at least information indicating a modulation scheme and an error correction coding rate (MCS), information indicating the number of spatial streams (NSS), and second control information, the second control information is information indicating whether modulation schemes applied to respective spatial streams are all the same, and when the second control information indicates that the modulation schemes applied to the respective spatial streams are not all the same, the first control information includes third control information. The reference modulation order is a modulation order of the modulation scheme indicated by the MCS.SELECTED DRAWING: Figure 4

The invention discloses a method for calculating a DMRS physical bit number carried by a PDSCH in a 5G NR network, and belongs to the technical field of mobile communication. The method comprises the following steps: determining the number of time domain positions of DMRS in a resource block by querying a predefined table and a calculation formula according to a PDSCH mapping type, the number of symbols and DMRS related parameters; according to parameters such as a DMRS configuration type and a CDM group, the number of frequency domain positions of the DMRS in a resource block is calculated through a specific formula; multiplying the number of the time domain position and the number of the frequency domain position to obtain the number of DMRS resource elements in a single resource block; and finally, the total number of physical bits of the DMRS is explicitly calculated by combining the total number of time slots occupied by the PDSCH, the number of resource blocks and the modulation order. The invention provides a parameterized and closed calculation method, a complex and time-consuming protocol process and a black box algorithm are avoided, and the efficiency and reliability of 5G NR data generation and test are remarkably improved.