213 results about "Modulation order" patented technology

The invention provides an optical-electric hybrid ultra-low time delay communication method and system, and relates to the technical field of communication, and the method comprises the steps: outputting a global synchronous clock signal with clock jitter less than 1ppm, dynamically dividing micro time slot resources in an orthogonal frequency division multiplexing symbol period, and generating a dynamically adjusted micro time slot resource distribution result; calculating an optimal phase offset matrix of the metasurface intelligent reflecting surface through a depth deterministic strategy gradient algorithm to obtain an optimized electromagnetic wave propagation path; generating a global optimization check matrix by aggregating the locally trained lightweight error correction model gradient of each node to obtain a compensated data stream; and constructing a causal graph model dynamic pruning high-entropy path to minimize causal entropy, through multi-agent reinforcement learning, taking time delay-energy efficiency as a game target to decide an optimal modulation order and a subcarrier switching strategy, and obtaining an optimized stable communication link. According to the invention, high-reliability and low-delay communication basic support is provided for high-precision intelligent manufacturing.

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 10kV medium-voltage power distribution network power line carrier communication method and system based on adaptive OFDM (Orthogonal Frequency Division Multiplexing), and the method comprises the steps that a master station sends a detection frame to a slave station, and the slave station carries out the CE (Channel Estimation), and obtains the CSI (Channel State Information); the method comprises the following steps of: dividing a broadband channel into a plurality of parallel orthogonal subcarriers, and dynamically allocating a modulation mode, a modulation order and a forward error correction (FEC) coding rate for each subcarrier of OFDM (Orthogonal Frequency Division Multiplexing) by adopting a water injection algorithm based on channel state information (CSI); adopting two-stage automatic gain control (AGC) to condition a signal received from a power line; and carrying out dynamic frequency hopping between a frequency band with serious interference and an idle frequency band based on a continuous spectrum sensing result. Compared with the prior art, through the multi-dimensional adaptive technology, the communication system can sense the channel state in real time and dynamically adjust the communication strategy, so that a stable communication link is established in a severe power grid environment.

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.

An apparatus and system for channel quality indication (CQI) and aperiodic reporting are described. The UE is configured to use demodulation reference signals (DM-RS) of a physical downlink control channel (PDCCH) or channel state information (CSI) reference signals (CSI-RS) for beam management for CSI reporting. The UE calculates the CQI from the DM-RSI or CSI-RS and sends the CQI to the gNB. The CQI configuration includes power offsets to be applied to the channel measurements for evaluation of the block error rate (BLER) depending on the CQI. Different power offsets are applied for different CQI groups that are determined by the modulation order associated with the calculated CQI.

A transmission system includes encoding and modulation means for encoding and mapping a plurality of frames. Each frame encapsulates a set of information bits of the data traffic, and is associated with a first modulation order and a coding rate, to a plurality of frames of encoded and modulated symbols; physical layer framing means arranged for inserting synchronization symbols taken from a second modulation order into at least one frame of encoded and modulated symbols of said plurality, to obtain a plurality of physical layer frames. The transmission system has expansion means to replace, if the second modulation order is smaller than the first modulation order, at least a subset of the synchronization symbols inserted by the physical layer framing means by symbols from the same constellation as the modulated symbols in the frames of encoded and modulated symbols.

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.

A first wireless communication device (201) assists with synchronizing a second wireless communication device (209) by wirelessly receiving (303) a first timing information signal (203) transmitted from a target wireless communication network (205), wherein the first timing information signal (203) has a first bandwidth, a first order of modulation, and a first coding format associated with a first coding complexity, and wherein the first timing information signal (203) comprises radio signal timing information and system information. The first wireless communication device (201) produces (305) a second timing information signal (207) that comprises the radio signal timing information, wherein the second timing information signal has a second bandwidth, a second order of modulation, and a second coding format associated with a second coding complexity. The second timing information signal (207) is characterized by one or more of: the second bandwidth is lower than the first bandwidth; the second order of modulation is lower than the first order of modulation; and the second coding complexity is lower than the first coding complexity; and transmitting (307) the second timing information signal (207) for receipt by the second wireless communication device (209).

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.

A method of a user equipment (UE) in a wireless communication system is provide. The method includes: receiving, from a base station, physical downlink shared channel (PDSCH) configuration information including a higher layer parameter for a modulation and coding scheme (MCS) table; identifying the MCS table for a PDSCH based on the higher layer parameter for the MCS table; receiving, from the base station, the PDSCH; and decoding, based on the identified MCS table, the PDSCH, wherein, in case that the higher layer parameter for the MCS table indicates a 1024-quadrature amplitude modulation (QAM), the MCS table for the PDSCH is identified as an MCS table with a maximum modulation order of 10, and wherein the MCS table with the maximum modulation order of 10 includes a set of combinations comprising a modulation order and a target code rate, the set of combinations including: (10, 805.5 / 1024), (10, 853 / 1024), (10, 900.5 / 1024), and (10, 948 / 1024).

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.

A system includes a base station and a user equipment. The base station transmits, to the user equipment, downlink control information including an index indicating a first modulation order, a second modulation order, and a transport block size; and uses the second modulation order for a first transport block to be transmitted in a partial subframe, wherein the second modulation order is higher than the first modulation order which is used for a second transport block to be transmitted in a complete subframe of a defined length. The base station transmits the first transport block in the partial subframe to the user equipment. The user equipment receives, from the base station, the downlink control information including the index indicating the first modulation order, the second modulation order, and the transport block size, and receives, from the base station, the first transport block.

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.

An embodiment of the present application provides a component decoding method for a TURBO code, a decoding method for a TURBO code, and related equipment, including: receiving and demodulating data to be decoded according to a scheduling configuration to obtain decoding input data; and calculating the code rate and modulation order of the decoding input data; calculating an adjustment value for the decoding input data and a bit width shift value of a decoder internal posterior probability branch metric parameter according to the modulation order and code rate of the decoding input data; adjusting the numerical value of the decoding input data by the adjustment value to obtain first decoding input data; component decoding the first decoding input data to obtain a calculation result of the decoder internal posterior probability branch metric; and shifting the calculation result of the decoder internal posterior probability branch metric by the bit width shift value to obtain a component decoding output value. The method has the beneficial effect of improving decoding performance and is applicable to the technical field of TURBO code decoding.

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.