295 results about "Multi carrier" patented technology

The invention discloses an imitated radio frequency division multiplexing signal detection method based on low-complexity optimization expected propagation, and belongs to the signal detection technology of multi-carrier communication. According to the method, information is updated through iteration to approach an ML result, and the complexity is reduced from an exponential level to a cubic level; in order to reduce the complexity of the EP, sparse and quasi-banded channel structures in the DAFT domain are utilized. Through matrix block decomposition, upper and lower triangular decomposition and upper triangular matrix forward substitution, low-complexity matrix inversion is successfully realized, and the complexity of the EP algorithm is reduced to a linear level. In addition, the EP algorithm performance is further improved through a deep learning optimization moment matching strategy, so that the process becomes more adaptive through trainable positive and negative component parameters. In addition, DAFT domain iteration detection and decoding can be achieved based on the method, external information of a decoder is fed back to a detector, and the reliability of the whole system is remarkably improved. According to the invention, effective balance between performance improvement and calculation complexity is realized.

A method, system and apparatus are disclosed. A network node is configured to determine a signaling measurement rule corresponding to measurement of reference signals corresponding to at least one component carrier. The network node is configured to cause a user equipment, UE, to perform at least one measurement based on the measurement rule. In some embodiments, a UE is configured to communicate with a network node and is configured to receive a signaling measurement rule corresponding to measurement of reference signals corresponding to at least one component carrier and perform at least one measurement based on the measurement rule.

Disclosed is a multicarrier (MC) connection design via an intelligent exploitation of the multi-user diversity in delay-Doppler domain. Overall, the technology can play a key role as an enabler technology toward 5G and beyond communications systems with applications of NR-Lite, mMTC, eMBB, URLLC and SURLLC.

The invention relates to the technical field of wireless optical communication, and discloses a multi-carrier wireless optical communication physical layer security authentication system and method.The receiving end of the system comprises a multi-receiver joint judgment module, a data gating module, an information sink and at least three receivers; each receiver comprises an optical detector, a cyclic prefix removal module, an FFT (Fast Fourier Transform) module, a receiving end key update storage and watermark generation module, a channel estimation and watermark extraction module, a subcarrier authentication module, a multi-carrier self-adaptive decision judgment module and a multi-carrier integration module; oFDM frequency domain channel response is used as an implicit fingerprint, a self-adaptive switching decision strategy is executed according to the average signal-to-noise ratio, fine recognition of legal device position features is achieved without ranging hardware, IM / DD can be adapted, the problem of imitation attack and replay attack authentication of attackers is effectively solved from the physical mechanism, and the method has the advantages of being high in practicability and high in practicability. And the accuracy and robustness of physical layer authentication are obviously improved.

A terminal includes: a reception unit configured to receive, from a base station, a first signaling including at least information indicating a first cell used for performing multi-carrier scheduling by single control information; and a control unit configured to determine the first cell based on an information element for configuring a serving cell included in the first signaling. The reception unit receives the single control information in the first cell from the base station, and the control unit determines a plurality of scheduled second cells based on the single control information.

A terminal includes: a control unit configured to assume that there are a scheduling cell and a scheduled cell in multi-carrier scheduling by single control information; and a reception unit configured to receive the single control information from the scheduling cell. The reception unit receives a plurality of scheduled cells based on the single control information, and, in a case where the plurality of the scheduled cells include an unlicensed frequency cell, the control unit determines an applicable multi-channel access method or determines an applicable operation related to Type 2 HARQ (Hybrid automatic repeat request) codebook.

Embodiments of the present application disclose a physical downlink control channel monitoring method and device, a terminal device and a network device. The method comprises: a network device sending first information, the first information being used to determine a maximum number limit of PDCCH candidates and / or a maximum number limit of non-overlapping CCEs of a scheduled cell in a time unit in M cells by a terminal device, the scheduled cell being a cell supporting multi-carrier scheduling, and M being an integer greater than 1; the terminal device obtaining the first information; and the terminal device performing PDCCH monitoring according to the maximum number limit of PDCCH candidates and / or the maximum number limit of non-overlapping CCEs. It can be seen that the embodiments of the present application are beneficial to performing PDCCH monitoring in the case of supporting multi-carrier scheduling, and the possibility of reducing the monitoring complexity of PDCCH to save power consumption is realized through multi-carrier scheduling.

Embodiments provide efficient multicast handover for content delivery to client devices in multi-carrier communications systems. For example, client devices in a transport craft can consume a media channel offering via a first carrier during transport through the communications system. Embodiments can establish respective multicast groups for the media channel offering in at least the first carrier and a subsequent second carrier, and can notify the craft of the multicast groups prior to the craft being serviced by the second carrier. Such pre-notification can permit multicast handover of the media channel offering from the first carrier to the second carrier in a manner that avoids typical handover-related. For example, embodiments can direct multicast delivery of the media channel offering to the craft in accordance with the first multicast group while being serviced by the first carrier and in accordance with the second multicast group while being serviced by the second.

The invention relates to a common-mode voltage suppression method and system based on multiple carriers. The method comprises the following steps: acquiring a first phase duty ratio Ta, a second phase duty ratio Tb and a third phase duty ratio Tc in a current PWM period; comparing and sorting the first phase duty ratio Ta, the second phase duty ratio Tb and the third phase duty ratio Tc to obtain a maximum value Max, an intermediate value Mid and a minimum value Min; a first carrier C1 and a second carrier C2 are generated, the first carrier C1 and the second carrier C2 are carriers with the same amplitude and frequency, and the phase of the second carrier C2 lags behind 180 degrees relative to the first carrier C1; allocating the second carrier C2 to the phase bridge arm corresponding to the intermediate value Mid, and allocating the first carrier C1 to the phase bridge arm corresponding to the maximum value Max and the minimum value Min; and respectively comparing the first phase duty ratio Ta, the second phase duty ratio Tb and the third phase duty ratio Tc with the correspondingly allocated first carrier C1 or second carrier C2 to generate a three-phase PWM driving signal. According to the invention, the hardware cost is prevented from being increased.

The application relates to the technical field of quantum secure communication, and discloses a multi-carrier continuous variable quantum key distribution system and method, which comprises a multi-carrier quantum key generation module, a multi-carrier quantum state preparation module, an optical fiber channel, a multi-carrier quantum state detection module and a multi-carrier quantum key processing module. The application effectively avoids the influence of the dispersion effect of the optical fiber channel on the wideband CV-QKD system, improves the data processing performance of the wideband and long-distance CV-QKD system under an ultra-low signal-to-noise ratio, realizes an N-way CV-QKD system with different modulation protocols, and guarantees high-flexibility, high-practicability and high-code-rate quantum secure communication.

The embodiment of the invention provides a carrier control method and system, which can solve the technical problem of poor energy-saving effect of 5G communication in related technologies. The method comprises the following steps: determining a business service quality requirement of a network service unit in response to the condition that the network service unit meets multi-carrier configuration; and determining to turn off the carrier turn-off function of the network service unit under the condition that the service quality requirement of the service meets the service requirement condition. According to the invention, the range satisfying the multi-carrier overlapping coverage is delimited through the grid coverage statistical data, and the end-network collaborative energy-saving strategy is implemented based on the 5QI identifier of the 5GA signed user. When the 5GA signed user appears in the 3CC overlapping coverage range and the service demand condition is met, the energy-saving strategy of the vertical direction carrier turn-off in the range is closed, so that the service experience of the 5GA signed user is ensured, and the energy-saving effect of the whole 5G network can be ensured.

The invention discloses a service-adaptive satellite-borne non-uniform multicarrier demodulation device, and belongs to the field of digital signal processing. The method comprises the following steps of: firstly, performing orthogonal down-conversion and resampling filtering processing on a digital intermediate frequency signal sampled by an ADC (Analog to Digital Converter), processing the digital intermediate frequency signal by a non-uniform channelization splitter, and then serially outputting the digital intermediate frequency signal to a spread spectrum ratio self-adaptive variable burst capturer according to fixed quadruple sampling to capture a leading head and identify the spread spectrum ratio; the method comprises the following steps: completing symbol synchronization and de-spreading processing on an input signal according to a spread spectrum ratio, then completing carrier coarse synchronization and pattern word identification, completing modulation mode identification and carrier synchronization according to a pattern word, performing channel decoding through a multi-mode decoder to recover to an information bit stream, and outputting the information bit stream. And the information bit stream is sent to a service frame recombination processor for search identification and recombination splicing, and output is carried out after whole-frame CRC check is carried out. The method has the advantages of flexibility in use, low resource occupation and capability of realizing adaptive demodulation of variable-rate, multi-modulation-mode and multi-coding-mode service transmission signals without parameter configuration.

The invention discloses a clutter cancellation method for a common inductance comb regulation and control multiplexing signal, and relates to the technical field of radars, and the method comprises the steps: at a transmitting end, coupling a common inductance integrated signal of multi-carrier comb regulation and control multiplexing to a reference receiving channel, and forming a reference signal; at a receiving end, K periodic reference data and echo data are respectively taken from the reference signal and the echo, and K reference pulses and echo pulses of the radar are demodulated; connecting end to end to form a long-time filtering reference signal and a filtering preprocessing signal; a filtering weight vector is obtained through normalization minimum mean square processing to complete long-time assistance; c-NLMS processing is carried out on the reference pulse and the echo pulse in the same period, and short-time cancellation is completed; and converting a short-time cancellation result to a distance Doppler domain to obtain a distance Doppler map after clutter cancellation. According to the method, a mobile communication cyclic prefix signal structure is fully utilized, rapid steady-state cancellation of short pulses is realized, and the Doppler dispersion effect of strong ground clutters is greatly inhibited.

This invention discloses an optimal pairwise pilot design method for a filter bank multicarrier communication system. First, based on the pairwise pilot channel estimation method, a pilot optimization model is established, and expressions for inherent interference and prototype filters are given in the model. Then, using differentiation analysis, the optimal pilot values ​​are determined under constraint boundary conditions, thus transforming the constraints of the pilot optimization model into equality constraints. Finally, optimal pairwise pilot structures applicable to different prototype filters are provided, and these structures are used as pilot designs for the pairwise pilot channel estimation method. Using this method, only two columns of pilot symbols are needed for channel estimation, and different pilot structures are adopted according to the type of prototype filter, thereby reducing pilot load while adapting to different communication scenarios.

Disclosed are a method, an apparatus, and a system for transmitting a signal using multiple carriers. In detail, provided are a wireless communication apparatus including a communication module; and a processor, wherein the processor obtains a common back-off counter for a carrier set on which data is to be transmitted, wherein the carrier set includes at least one component carrier, performs back-off of each of the component carriers using the obtained common back-off counter, and simultaneously transmits data through at least one component carrier in which the back-off is completed and a wireless communication method using the same.

This disclosure relates to feedback for multi-carrier sidelink communications. In sidelink carrier aggregation, a first user equipment (UE) transmits data packets to a second UE using multiple carriers. The second UE transmits hybrid automatic repeat request (HARQ) ACK / NACK information for the data packets to the first UE via one or more physical sidelink feedback channels (PSFCH). The aggregated carriers can be constrained to have or not have the same PSFCH configuration. Resource selection for PSSCH transmission can be performed by considering the scheduled PSFCH in order to comply with the transmission capability limitations and / or half duplex limitations of the first UE and / or the second UE. The PSFCH can be transmitted on a single carrier of the multiple carriers but includes joint HARQ feedback for each of the carriers. Furthermore, HARQ feedback can be transmitted on a physical sidelink shared channel (PSSCH) that is signaled by the receiving UE (i.e., the UE transmitting the feedback) via sidelink control information (SCI).

The application discloses a kind of underwater acoustic communication sending control method and system, applied to the processor with multi-level storage and cache architecture.The method allocates double-buffered storage space in advance in physical storage area;Water acoustic communication data is handled to generate time domain digital signal sequence by multi-carrier digital modulation;In response to the filling completion state of data to the first buffer, cache coherency synchronization operation is performed to write the latest data in the cache of the processor back to the physical storage area;Subsequently trigger the hardware data carrying engine independent of kernel, and send data through external interface;During data carrying, fill the subsequent generated data to the idle second buffer.The application solves the problem of memory access conflict and data transmission break under high sampling rate through multi-level storage isolation and software and hardware collaborative zero-copy pipeline mechanism, and guarantees the high quality, high continuity sending of OFDM underwater acoustic signal.

This provides an uplink feedback method that operates using multiple carriers. [Solution] The method in a wireless transceiver unit (WTRU) includes the steps of: receiving a plurality of transport blocks on a plurality of configured carrier sets; generating hybrid automatic retransmission request (HARQ)-acknowledgment (ACK) feedback for the plurality of transport blocks; and determining the number of HARQ-ACK feedback bits to be used for the HARQ-ACK feedback. The WTRU may apply Reed-Muller coding to the HARQ-ACK feedback bits if the number of HARQ-ACK feedback bits is less than or equal to a threshold, or apply convolutional coding if the number of HARQ-ACK feedback bits is greater than the threshold. The WTRU may then transmit the encoded HARQ-ACK feedback bits.

The present application discloses a method and a device for wireless communications. A user equipment (UE) receives a first information block. The first information block is used to determine a first set of first-type cell sets. The UE receives a first signaling. The first signaling is used to determine a first cell set out of the first set of first-type cell sets. The first signaling comprises a first field and a second field. The first field is used to determine a first indication value. The first indication value corresponds to a starting serving cell and a first quantity value. The starting serving cell and the first quantity value are used to determine a second cell set. Any serving cell comprised in the second cell set belongs to the first cell set. The present application improves the way of indication with single Downlink Control Information (DCI) scheduling multiple carriers, thus enhancing the overall performance.

A method for reducing inter symbol interference (ISI) and inter carrier interference (ICI) in transmissions between a sender and a recipient within a wireless communication network. For at least one multicarrier symbol comprising a first subcarrier modulated with an original reference signal and multiplexed with a second subcarrier modulated with an original payload signal. The method includes applying a multiple symbol shift configuration on at least a second multicarrier symbol adjacent to the first multicarrier symbol by repeating the original reference signal and the original payload signal in the second multicarrier symbol on respective subcarriers and applying a linear phase shift to each repeated reference signal and payload signal. The same linear phase shift is used for both the repeated reference signal and the repeated payload signal.

The embodiment of the invention provides a multi-carrier communication scheduling method and system, a computer readable storage medium, an electronic device and a computer program product, and relates to the field of communication, and the multi-carrier communication scheduling method comprises the following steps: determining that a communication terminal enters a connection state; obtaining a service type of the communication terminal; and under the condition that the service type of the communication terminal is determined to be aperiodic transmission, sending an aperiodic scheduling resource to the communication terminal, so that the communication terminal performs data transmission based on the aperiodic scheduling resource, and under the condition of determining that the service type of the communication terminal is periodic transmission, sending periodic scheduling resources to the communication terminal, so that the communication terminal performs data transmission based on the periodic scheduling resources. Through the embodiment of the invention, the problem that the classified scheduling requirements of non-periodic scheduling and periodic scheduling on the communication terminal are difficult to meet in the related technology is solved.

The application belongs to the technical field of wireless communication, and discloses a backscattering communication method, device and system based on multi-carrier differential modulation t The transmission vector at t-1 time is expanded into a symmetric and full-rank subcarrier block transmission matrix, the transmission vector u t is subjected to rectangular differential modulation to obtain the transmission vector at t time, and then is converted into a time-domain data frame and mapped into a reflection coefficient; and the excitation source signal is modulated by means of an impedance network to generate a backscattering signal. Since differential modulation transmits information based on the difference between adjacent symbols, the channel state information is cancelled in the process of data detection at the receiving end, and the original sending data can be recovered by non-coherent detection of the receiving signal at the receiving end, without a complex cascaded channel estimation process, so that the complexity of the multi-carrier backscattering communication system is effectively reduced.

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may transmit capability information indicating a first number of carriers that the UE can simultaneously use. The UE may receive a configuration for a second number of activated carriers. The UE may switch one or more carriers for multicarrier transmission based at least in part on the configuration and capability information. Numerous other aspects are described.

A method and node for wireless communication. The communication node first transmits first information, the first information being used for indicating K REs, and then transmits K modulation symbols respectively on the K REs. Time-domain resources occupied by the K REs comprise M multicarrier symbols. A first multicarrier symbol is one of the M multicarrier symbols, and K1 modulation symbol(s) comprises(comprise) modulation symbol(s) among the K modulation symbols that is(are) mapped onto the first multicarrier symbol. The K modulation symbols belong to a target modulation-symbol sequence, and starting K2 modulation symbol(s) in the target modulation-symbol sequence comprises(comprise) the K1 modulation symbol(s). A time-domain position of the first multicarrier symbol among the M multicarrier symbols is related to at least one of a subcarrier spacing of a subcarrier occupied by the K REs or M.

Provided are a communication method, device and system, the communication method being applicable to a 5G network and a future 6G network. The method comprises: a second device receiving first indication information, the first indication information indicating a first resource, the first resource comprising at least one resource, each resource in the at least one resource being associated with a sub-block, the sub-block belonging to a first virtual carrier, the first virtual carrier comprising at least two sub-blocks, the at least two sub-blocks are in one-to-one correspondence with the at least two carriers, the first virtual carrier comprises a first BWP, the first BWP comprises frequency domain resources corresponding to the at least two sub-blocks in the first virtual carrier, and the first resource belongs to the first BWP; and sending the uplink information to the first device on the first resource. In the method, compared with multi-carrier aggregation, the virtual carrier simplifies the processing flow, for example, frequent activation or deactivation is not needed, and the signaling overhead is saved. Furthermore, uplink information is associated with the sub-blocks, so that flexible management of uplink resources is realized.

A wireless communication method implemented by a transmission user equipment includes receiving first secondary carrier status indication information from a network device, where the first secondary carrier status indication information indicates that each of a plurality of secondary carriers is in an activated state or a deactivated state, the plurality of secondary carriers are used for multi-carrier sidelink communication between the transmission user equipment and at least one reception user equipment, and each reception user equipment corresponds to at least one secondary carrier; sending second secondary carrier status indication information to each reception user equipment, where the second secondary carrier status indication information indicates that each of the at least one secondary carrier is in an activated state or a deactivated state; and when acknowledgment information is received from one or more reception user equipments, sending secondary carrier setting complete information to the network device.

A communication method and apparatus are provided for reducing device costs and power consumption and improving the accuracy of nonlinear distortion in reception and transmission of a communication system. The communication method includes: a transmitting device sends a first carrier signal to a receiving device; the transmitting device obtains digital pre-distortion DPD coefficients fed back by the receiving device, the DPD coefficients being determined by the receiving device based on the received first carrier signal; the transmitting device performs digital pre-distortion processing on a multi-carrier signal to be sent based on the DPD coefficients to generate a nonlinear pre-distortion signal; and generates a second carrier signal based on the nonlinear pre-distortion signal, the signal to be sent being loaded with a baseband signal; and the transmitting device transmits the second carrier signal to the receiving device.

The invention discloses a user time delay estimation method of an IRS-assisted multicarrier ISAC system. In the method, a plurality of users send pilot signals, and each IRS reflects the user signals and transmits the user signals to a remote radio access unit (RRH); the RRH uploads the received signal to a centralized baseband processing unit pool (BBU) through a forward link; as the parameters of the link from the IRS to the RRH can be acquired in advance, the method carries out time delay estimation on the link from the user to the IRS; the BBU constructs an observation matrix of a pilot signal on a joint dimension of a plurality of subcarriers and an IRS unit and utilizes a multi-snapshot effect provided by a plurality of receiving antennas to realize high-precision time delay estimation from a user to an IRS link; according to the method, sparse structures of a frequency domain and a space domain are fully utilized, and the time delay resolution and the estimation precision are effectively improved, so that the user positioning capability in a complex environment is enhanced.