19results about "Frequency-division multiplex" patented technology

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.

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.

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

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 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.

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.

The application provides a communication signal data processing scheduling system, method and electronic equipment, wherein the system comprises: a data receiving and preprocessing subsystem which performs preprocessing operation on original data to obtain preprocessing products and metadata comprising signal type information of the original data; a task planning management subsystem which is used for determining a task plan associated with the original data; and a signal processing subsystem which adaptively triggers a special communication signal processing flow corresponding to the signal type information according to the task plan and the signal type information in the metadata, and processes the preprocessing products to obtain signal processing products. The system introduces an adaptive triggering mechanism based on signal type information, realizes accurate on-demand calling of processing flows, effectively avoids occupation of redundant computing resources for unknown signal types, significantly improves system resource utilization, and guarantees processing capacity and user experience of the system in high-concurrency or resource-limited scenarios.

To provide a system and method for communicating an orthogonal frequency division multiplexing (OFDM) frame format.SOLUTION: An Orthogonal Frequency Division Multiple Access (OFDMA) frame communicated over a 20 MegaHertz (MHz) channel may include eight 26-tone resource units (RUs), one 26-tone bifurcated RU, and a direct current (DC) region. The eight 26-tone RUs may include twenty-six consecutive data and pilot tones, and the bifurcated 26-tone RU may be split into two 13-tone portions each of which includes thirteen consecutive data and pilot tones. The DC region may include seven null tones. In one example, the DC region of the 20 MHz MU-OFDMA frame consists of three DC tones and four null-data tones.SELECTED DRAWING: Figure 3A

A communication apparatus includes: a communication unit configured to perform communication with a terrestrial apparatus by FD (Full Duplex) in a service link or a feeder link of a non-terrestrial network; and a control unit configured to remove a self-interference that is an interference to a reception signal by a transmission signal.

A method and apparatus for setting limited RUs and MRUs in a wireless LAN system are proposed. [Solution] The receiving STA receives the PPDU from the transmitting STA via a pre-configured frequency band and decodes the PPDU. The receiving STA is an STA that operates only in the 20MHz band. The PPDU includes a preamble and a data field. The data field is received in the pre-configured frequency band, excluding the first RU and first MRU resources.

The apparatus may be a base station. The apparatus processes a plurality of synchronization signals by performing time-division multiplexing (TDM) of at least one of a plurality of first synchronization signals of different types and at least one of the plurality of second synchronization signals of different types, the plurality of synchronization signals including the plurality of first synchronization signals and the plurality of second synchronization signals. The apparatus transmits the processed synchronization signals to a user equipment (UE).

To improve reception quality in cooperative communication. [Solution] The access point includes a control circuit that generates first control information which includes information common to at least a portion of the second control information included in the second preamble, which is a component of the second signal transmitted by the second AP, when the first AP and the second AP simultaneously transmit a first signal and a second signal, respectively, and a transmission circuit that transmits a first signal which is a component of the first preamble containing the first control information, wherein the first signal is transmitted to a first STA associated with the first AP, and the second signal is transmitted to a second STA associated with the second AP, the first control information includes a first SIG field and a second SIG field, the second SIG field includes a Common field, a first User field for the first STA and a second User field for the second STA, and the control circuit sets identification information for the first STA and identification information for the second STA in the first User field and the second User field, respectively.

An exemplary object is to provide a communication system that can flexibly determine whether carrier aggregation is applicable or not per UE. The communication system according to an exemplary embodiment of the invention includes a base station (10) that wirelessly communicates with a mobile station (20) by using at least one of a first frequency band and a second frequency band, the mobile station (20) being located concurrently in a cell (100) using a first frequency band and a cell (110) using a second frequency band, and a network device (30) that sends, to the base station (10), information to be used for determining a frequency band to be used.

A filter for a carrier aggregation system, the filter passing a first band of a carrier aggregation signal, includes a surface acoustic wave device 10 including a quartz crystal substrate 12, an interdigital transducer electrode, and a lithium tantalate (LiTaO) layer 14 positioned between the quartz crystal substrate 12 and the interdigital transducer (IDT) electrode 16. [Effect] The filter suppresses higher-order spurious modes corresponding to the second band of the carrier aggregation signal.

The purpose of the present invention is to solve the problem of an increase in size by integrating system configurations of two systems into one system in an intermediate band. The present invention is provided with a first unit, a second unit, and a single cable connecting the first unit and the second unit. The first unit includes N donor antennas from a first donor antenna to an Nth donor antenna that communicate with a base station, a first connection unit connected to an analog cable, and N donor-side frequency conversion units from a donor-side first frequency conversion unit to a donor-side Nth frequency conversion unit (where N is an integer of 2 or more). Each of the N donor-side frequency conversion units from the donor-side first frequency conversion unit to the donor-side Nth frequency conversion unit converts a signal of a frequency fRF received by a corresponding donor antenna among the N donor antennas from the first donor antenna to the Nth donor antenna into an intermediate signal by means of a local signal of each of the N donor-side frequency conversion units. The frequencies of the local signal and the intermediate signal differ from each other by the donor-side frequency conversion unit. The second unit is provided with: N service antennas from first to Nth service antennas that communicate with the communication terminal; the second connecting part is connected with the analog cable; and N service-side frequency conversion units from the service-side first frequency conversion unit to the service-side Nth frequency conversion unit. Each of the N service-side frequency conversion units from the service-side first frequency conversion unit to the service-side Nth frequency conversion unit converts a signal of a frequency fRF received by a corresponding service antenna among the N service antennas from the first service antenna to the Nth service antenna into an intermediate signal, which is an analog signal, by means of a local signal of each of the N service-side frequency conversion units. The frequencies of the local signal and the intermediate signal differ from each other for each service-side frequency conversion unit. Intermediate signals of the first to Nth intermediate signals are transmitted in an overlapping manner in one cable.