63results about "Frequency-division multiplex" patented technology

The invention relates to the technical field of optical fiber communication and sensing, and discloses an optical fiber coding and positioning integrated sensing device based on frequency division multiplexing and an application method, and the optical fiber coding and positioning integrated sensing device comprises a light source module, a coupler module, a frequency division multiplexing module, a sensing optical fiber network, a signal demodulation module, a positioning sensing module and a main control unit. According to the optical fiber coding and positioning integrated sensing device based on frequency division multiplexing and the application method thereof, a light source module generates broadband continuous optical signals, a coupler module realizes optical signal coupling and separation, a frequency division multiplexing module integrates sub optical signals, and an optical fiber sensing unit of a sensing optical fiber network senses and encodes external physical quantities. The positioning sensing module realizes accurate positioning, the signal demodulation module separates sub optical signals and extracts information, the main control unit operates in a coordinated manner, processes and analyzes data and outputs a result, all the modules cooperate to form an efficient and stable monitoring system, the requirements for multi-physical-quantity synchronous monitoring and accurate position positioning in a large-scale and long-distance scene are met, and the system performance is improved.

To provide a communication device and a communication signal generation method for adaptively performing power line communication using a cable capable of obtaining desired communication characteristics enough to respond to a user's request.SOLUTION: A communication device includes a selection unit that selects one mode from a plurality of modes that are defined in a predetermined frequency band used for communication with another communication device and define different numbers of channels, and selects a channel in the selected mode, and a communication unit that performs communication with the other communication device using the selected mode and channel. When the communication unit does not receive the control signal from the other communication device, the selection unit changes the channel used for communication.SELECTED DRAWING: Figure 5

To provide a terminal that can set an appropriate cyclic prefix (CP) according to the compression rate in the time domain using Faster-Than-Nyquist (FTN) or the like.SOLUTION: A terminal transmits and receives slots consisting of multiple symbols. The terminal sets the length of the cyclic prefix added to the symbol on the basis of the degree of compression of the symbol in the time domain.SELECTED DRAWING: Figure 7

The present application relates to filter device, multiplexer and communication device, provide the filter device of multi-band response with wide band and low loss passband, wide band stopband and narrow band and steep stopband. The filter (1) has: input and output terminal (100, 110);LC parallel resonant circuit (10) has inductor (L1) and capacitor (C1) connected in parallel with each other;And elastic wave series resonant circuit, have series arm resonator (s1, s2) connected in series with each other, LC parallel resonant circuit (10) and elastic wave series resonant circuit are connected in series between input and output terminal (100) and input and output terminal (110).

In a wireless communication system in which when connecting one terminal apparatus to a base station apparatus and another base station apparatus, the other base station apparatus selects a frequency band to be used for control channels transmitted from the terminal apparatus to the other base station apparatus from a plurality of frequency bands usable by the other base station apparatus, and notifies the terminal apparatus of the selected frequency band, the base station apparatus acquires, from the terminal apparatus, information about radio quality of a signal received from the other base station apparatus for at least one frequency band out of the plurality of frequency bands, extracts portion of frequency bands out of the plurality of frequency bands based on the acquired information about radio quality, and notifies the other base station apparatus of information representing the portion of frequency bands.

A method and apparatus for resource allocation for half duplex frequency division duplexing in a wireless communication system is provided. Fixed or variable HARQ timing of greater than 5 subframes may be implemented. Acknowledgements for multiple downlink (uplink) transmissions can be bundled into a single acknowledgement transmitted on an uplink (downlink) control channel. Bundled acknowledgements for downlink transmissions may also be provided. Variable lead time cross subframe scheduling may be provided in which the number of subframes of delay between an uplink or downlink grant and the corresponding scheduled uplink or downlink transmission changes based on other scheduled events and / or half-duplex transceiver availability in the appropriate mode. The scheduling may select the earliest available subframe after a minimum delay. Uplink grant bundling may also be performed, in which multiple uplink grants are transmitted via a single grant indication.

The embodiments of the present application provide a data transmission method, a communication device, and a communication system. The method includes: a baseband unit determines first data mapped to a first time unit from a first data stream of a first user, the number of symbols included in the first time unit is less than the number of symbols included in one slot, the first data is a part of the data in the first data stream, and the baseband unit transmits the first data to a radio frequency unit in a time window corresponding to the first time unit. In this solution, when the baseband unit transmits user data to the radio frequency unit, the user's data stream is divided in the time domain based on a time unit granularity, and a data amount of a single time unit granularity obtained by the division is transmitted each time, thereby reducing the data amount transmitted at one time. When a bit error or data loss occurs in the data transmitted at one time, the method can reduce the amount of data to be retransmitted and improve data transmission efficiency.

The first station (STA) receives a trigger frame from overlapping Basic Service Set (OBSS) access points (APs) that allocates a first distributed resource unit within the frequency channel bandwidth. The first STA transmits the data portion of the first physical layer protocol data unit (PPDU) through a second distributed resource unit within the frequency channel bandwidth that is not allocated by the trigger frame. In one embodiment, the second distributed resource unit is indicated in the user information field of the trigger frame.

An Electrical Vehicle (EV) charging station and communication network with redundancy protocol including a network server, a plurality of gateways with at least a first and second gateway, and a plurality of EV charging stations structured to be in WiFi communication with the plurality of gateways. First gateway, by default is the primary gateway and structured to be in cellular communication with the network server via first cellular communication provider. Second gateway by default is available as a charger, but in standby and structured to be in cellular communication with the network server via second cellular communication provider. The plurality of EV charging stations is structured to send and receive charging information via WiFi first gateway when it is the active primary gateway. They are structured to switch to second gateway when it has become the primary gateway due to communication failure of the first gateway with the network server.

To provide a method for synchronizing baseband clocks in an OFDMA wireless microphone system.SOLUTION: An example method includes a step of receiving a plurality of pilot subcarriers from an audio transmitter. The method also includes a step of determining a timing offset estimate based on the pilot subcarriers. The method further includes a step of determining a tuning value by passing the timing offset estimate through a proportional-integral controller. The method further includes a step of determining a modified reference signal by modifying a reference oscillator based on the tuning value. The method further includes a step of controlling (i) an audio sample clock and (ii) an antenna data clock based on the modified reference signal.SELECTED DRAWING: Figure 2

A method of wireless communication performed by a base station includes grouping a plurality of wireless devices associated with a coverage area of the base station into multiple spatial groups, and configuring the wireless devices in each spatial group to use overlapping time-frequency transmission resources for uplink (UL) data transmissions to the base station. The method also includes scheduling, on a same set of time-frequency transmission resources, demodulation reference signal (DMRS) transmissions by the wireless devices in a respective spatial group of the multiple spatial groups. In various aspects, the multiple spatial groups are determined based on respective estimated angles of arrival of the plurality of wireless devices associated with the coverage area of the base station. In some instances, each of the wireless devices in the respective spatial group uses the same antenna ports as the other wireless devices in the respective spatial group for the DMRS transmissions.

The invention relates to a radio transmission apparatus including: a transmitting section (103) that transmits, to a receiving apparatus, an index indicating a transmission format including a transport block size, TB size, for user data; and a receiving section (105) that receives the user data and control information, which are coded using the transmission format at the receiving apparatus and which are transmitted from the receiving apparatus. In the apparatus, a coding rate of the user data for the TB size of the transmission format is adjusted depending on a combination with the control information to be transmitted together with the user data.

To provide a terminal that can set an appropriate cyclic prefix (CP) according to the compression rate in the time domain using Faster-Than-Nyquist (FTN) or the like.SOLUTION: A terminal transmits and receives slots consisting of multiple symbols. The terminal sets the length of the cyclic prefix added to the symbol on the basis of the degree of compression of the symbol in the time domain.SELECTED DRAWING: Figure 7

An transmission apparatus of the present disclosure comprises a transmission signal generator which, in operation, generates a transmission signal that includes a non-legacy preamble and a data field, the non-legacy preamble comprising a first field for indicating a number of spatial streams (Nss) in the data field and a second field for indicating one of a plurality of modulation and coding schemes (MCSs), wherein two or more frequency diversity transmission schemes are supported and each of the two or more frequency diversity transmission schemes is specified based on a value of the Nss; and a transmitter which, in operation, transmits the generated transmission signal.

A wireless communication system includes: a transmitter configured to transmit a carrier wave that is unmodulated; a plurality of passive terminals; and a receiver. Each of the plurality of passive terminals is configured to receive the carrier wave, superimpose a subcarrier of which frequency is determined in advance for each of the plurality of passive terminals on a backscatter of the carrier wave, modulate a signal generated by a signal source onto the subcarrier using a predetermined modulation scheme, and transmit the backscatter. The receiver is configured to receive multiple backscatters transmitted from the plurality of passive terminals, perform frequency conversion and orthogonal transformation on the multiple backscatters to generate a finite-length data series having an I component and a Q component, remove an interference component from the finite-length data series, and perform demodulation to acquire the signal of the signal source in each of the plurality of passive terminals.

According to the present invention, a base station is provided with: a control circuit that, through non-orthogonal multiplexing, allocates a first transmission power to a first signal corresponding to a first terminal type and allocates a second transmission power to a second signal corresponding to a second terminal type; and a transmission circuit that transmits the first signal and second signal having been non-orthogonally multiplexed.

To provide a radio communication system capable of suppressing reduction of communication quality caused by inter-channel interference and / or self-interference due to channel bonding.SOLUTION: A transmission apparatus 100 of a radio communication system 1 includes N pieces of transmission-side circuit devices 103g-n. The n-th transmission-side circuit device 103g-n acts on an n-th transmission signal from an n-th transmission-side band pass filter 103d-n. The n-th transmission-side circuit device 103g-n is an attenuator or amplifier having a wider operation bandwidth than a bandwidth of a channel bonding signal. A reception apparatus 200 of the radio communication system 1 includes N pieces of reception-side circuit devices 203g-n. The n-th reception-side circuit device 203g-n acts on an n-th reception signal from a distributor 203a. The n-th reception-side circuit device 203g-n is an attenuator or amplifier having a wider operation bandwidth than the bandwidth of the channel bonding signal.SELECTED DRAWING: Figure 10

An aggregation station: receives, from each of the base stations, communication path information with each of accommodated user terminals, for each user terminal; in a case where it is determined that the two of the base stations and the two user terminals are arranged on the straight line, generates first information for performing setting such that a transmission beam of any one of the base stations arranged on the straight line is stopped and another of the base stations non-orthogonally superimposes and multiplexes pieces of transmission data for the two respective user terminals with a predetermined power difference or power ratio; and controls the transmission beam of each of the two of the base stations arranged on the straight line on the basis of the first information.

To provide an information instruction method, specifically in the field of wireless fidelity technology.SOLUTION: The method includes an access point (AP) determining resource instruction information and transmitting the resource instruction information. The resource instruction information includes a plurality of bit sequences. A first bit sequence in the plurality of bit sequences corresponds to a first resource unit. The first resource unit is a resource unit in a resource block set that is allocated to a first station (STA) or a plurality of STAs. The resource block set includes at least two resource units. The method provided in an embodiment of the present application is used for two content channels to transmit HE-SIGNAL B in order to indicate that the plurality of resource units are allocated to one or more stations, for the purpose of reducing a signaling overhead.SELECTED DRAWING: Figure 13

The present invention is designed so that, even when communication is carried out by multiplexing a number of numerologies in the same carrier, it is still possible to communicate properly. A user terminal communicates in a radio communication system where frame structures of a plurality of numerologies are frequency-division-multiplexed, and has a receiving section that receives first information, which relates to a frame structure of a predetermined numerology, and second information, which specifies a period in which DL communication and / or UL communication are disallowed, or a period in which a specific communicating direction is configured, in the predetermined numerology, and a control section that controls DL receipt and / or UL transmission based on the first information and the second information.

To more reliably perform deinterleaving.SOLUTION: The present disclosure provides a receiving device that includes a deinterleaver that deinterleaves the interleaved signal to return it to its original order on the basis of control information included in the physical layer frame transmitted for each transmission path from a transmitting device including: an interleaver that interleaves an FEC block among multiple transmission paths; and a frame constructor that constructs a physical layer frame for each transmission path using the interleaved signal and a control information signal. The control information includes information used when synchronizing and processing the interleaved signal included in the physical layer frame transmitted for each transmission path during deinterleaving. For example, the present disclosure can be applied to broadcasting using channel bonding.SELECTED DRAWING: Figure 3

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services.

The present invention is designed to allow communication based on appropriate numerologies even when multiple numerologies are used. According to one aspect of the present invention, a user terminal has a receiving section that monitors downlink control information by assuming a plurality of communication parameters that relate to a frequency domain and / or a time domain, and a control section that judges that at least part of parameters that relate to a search space for monitoring the downlink control information is different, for each of the communication parameters.

The invention discloses an MMF problem optimization method for a received signal SINR of an RIS-AFDM-NOMA system. The MMF problem optimization method comprises the following steps: constructing an uplink communication link of the RIS-AFDM-NOMA system; iDAFT is carried out on the DAFT domain signals of the K user terminals to generate transmission signals; the method comprises the following steps of: establishing a double-selectivity channel model, after a transmission signal passes through the channel, acquiring a total receiving signal by a receiving end, and performing DAFT conversion, matrix-vector form, sorting and SIC operation processing; and an MMF optimization problem of the UTk received signal SINR is constructed, and a power distribution coefficient, a precoding matrix and an RIS phase shift matrix are adjusted to carry out joint optimization solution. By the adoption of the method, on the basis of original signal enhancement and user rate improvement, parameter configuration during optimization of the multi-user SINR on the premise that fairness is met is obtained, and corresponding technical support is provided for AFDM communication in a 6G high mobility scene.

This disclosure relates to the field of oil and gas extraction technology, and in particular to a DC power line carrier communication method, apparatus, measurement and control equipment, and medium, which can solve the problems of synchronous transmission and reception in half-duplex communication and the complexity and redundancy of full-duplex schemes. The method includes selecting at least one of a first communication frequency band and a second communication frequency band to complete data transmission according to data transmission requirements, wherein the first and second communication frequency bands are mutually isolated; in the first communication frequency band, a first mixed signal is received, and a first carrier signal is isolated from the first mixed signal for parsing to obtain control commands; in the second communication frequency band, a second carrier signal characterizing downhole physical feature data is superimposed on the DC power supply base component and encoded to generate a second mixed signal for transmission. By achieving full-duplex communication through frequency division multiplexing, downhole equipment can simultaneously receive control commands and transmit monitoring data, solving the latency problem of half-duplex communication.

Wireless communications systems and methods related to communicating information are provided. A method of wireless communication performed by a user equipment (UE). The method of wireless communication also includes receiving a configuration from a network for uplink transmission using a first plurality of subcarriers; receiving an instruction from the network for interference cancellation with respect to the first plurality of subcarriers; calculating a plurality of symbols and modulating the plurality of symbols on a second plurality of subcarriers in accordance with the instruction from the network for interference cancellation; and transmitting a waveform to the network, the waveform including the first plurality of subcarriers and the second plurality of subcarriers.

This application relates to the field of wireless communication technology and discloses a method and apparatus for transmitting encoded bits to improve the spectral resource utilization rate and data rate of a Wi-Fi system. [Solution] The method includes the following: The transmitting side performs channel coding on information bits according to the MCS used to generate coded bits, and distributes the coded bits to multiple channel sets or multiple resource units according to distribution rules. The receiving side receives the coded bits carried by multiple channel sets used for single-user preamble puncturing transmission or multiple resource units used for orthogonal frequency division multiple access OFDMA transmission according to reception and coupling rules, and performs channel decoding on the coded bits according to the modulation and coding scheme MCS used to generate information bits. The MCS is an MCS used for each of the multiple channel sets or an MCS used for each of the multiple resource units.

To appropriately configure an SUL (Supplemental UpLink) carrier when the SUL carrier is used, a user terminal according to one aspect of the present invention is a user terminal that performs communication by using a first carrier on which at least DL transmission is performed and a second carrier on which only UL transmission is performed. The user terminal includes a receiving section that receives certain downlink control information transmitted from the first carrier, and a control section that controls UL signal transmission on the second carrier, based on the certain downlink control information. The certain downlink control information is one of a downlink control information transmitted on a certain condition without a carrier indicator field (CIF), and a downlink control information including a CIF configured independently of a CIF of downlink control information used for notification of at least DL allocation.