Abstract: A method for feeding back information about a channel between antenna arrays is provided, which includes: receiving, by a first network device, sub-channel channel information of N×M sub-channels that is sent by a second network device, where an antenna array of the first network device includes M panels, an antenna array of the second network device includes N panels, the channel between the first network device and the second network device includes the N×M sub-channels, M is a positive integer that is greater than or equal to 2, N is and N is a positive integer, M and N are not to be 1 at the same time, and the M panels and the N panels each includes at least two antennas; generating channel information of the channel between the first network device and the second network device according to the sub-channel channel information of the N×M sub-channels.

Abstract: This application discloses a transmission control method, apparatus, and system, and a storage medium, and belongs to the field of communications technologies. The method includes: generating target control format indicator information, where the target control format indicator information is used to indicate a target time-frequency resource occupied by a downlink control channel; and sending the target control format indicator information. According to this application, a problem that a time-frequency resource occupied by a downlink control channel cannot be adjusted can be resolved, and the time-frequency resource occupied by the downlink control channel can be flexibly adjusted. This application is used for transmission control.

Abstract: A reference signal transmission method is provided, including: generating, by a network side device, a transmission unit, where the transmission unit includes a user equipment-specific demodulation reference signal UE-specific DM-RS, a time-frequency region for unicast control, and a user-specific data time-frequency region; and sending the transmission unit to user equipment, where the UE-specific DM-RS is reused or shared to demodulate the time-frequency region for unicast control and the user-specific data time-frequency region.

Abstract: Implementations of this application propose example methods and apparatuses for feeding back channel state information. In one example method applied to a wireless communications system, operations include receiving, by a user equipment, time configuration signaling and feedback configuration signaling, where the time configuration signaling is used to set a feedback time period and the feedback configuration signaling is used to configure one or more feedback cycles. The user equipment obtains and sends channel state information in one or more feedback cycles during the feedback time period.

Abstract: Systems and methods can be implemented to conduct searches based on images used as queries in a variety of applications. In various embodiments, a set of visual words representing a query image are generated from features extracted from the query image and are compared with visual words of index images. A set of candidate images is generated from the index images resulting from matching one or more visual words in the comparison. A multi-level ranking is conducted to sort the candidate images of the set of candidate images, and results of the multi-level ranking are returned to a user device that provided the query image. Additional systems and methods are disclosed.

Abstract: This application discloses a data sending method, a data receiving method, a device, a system, and a storage medium, and pertains to the field of communications technologies. The method includes: precoding at least two first preprocessed spatial flows to obtain a plurality of precoded data flows, where the at least two first preprocessed spatial flows are obtained by preprocessing a first original spatial flow; and transmitting the plurality of precoded data flows. This application helps to resolve a problem that a plurality of UEs cannot perform spatial multiplexing on a time-frequency resource and a system throughput is affected, helps the plurality of UEs to perform spatial multiplexing on the time-frequency resource, and improves the system throughput. This application is used for data transmission.

Abstract: This application discloses a data sending method, a data receiving method, a device, and a system, and belongs to the field of communications technologies. The data sending method includes: precoding a plurality of spatial flows to obtain a plurality of precoded data streams, where the plurality of spatial flows include at least two first preprocessed spatial flows, and the at least two first preprocessed spatial flows are obtained by preprocessing a first original spatial flow; and transmitting the plurality of precoded data streams. This application resolves a problem of relatively low scheduling flexibility and improves scheduling flexibility. This application is used for data transmission.

Abstract: This application provides a technical solution for rank indication, and especially when a CQI number is not configured or a CQI number is 1, a network device configures a rank indication restriction parameter as that at least one of ranks whose index numbers are 0, 1, 2, and 3 is allowed to be reported by the terminal device; or even if the network device does not perform the foregoing configuration, and none of the ranks whose index numbers are 0, 1, 2, and 3 is allowed to be reported, the terminal device may select at least one rank for RI reporting, so as to resolve a problem that a system cannot work. In addition, according to embodiments of this application, bit overheads required for RI reporting may further be reduced.

Abstract: A method for feeding back information about a channel between antenna arrays is provided, which includes: receiving, by a first network device, channel information of N×M sub-channels that is sent by a second network device, where an antenna array of the first network device includes M subarrays, an antenna array of the second network device includes N subarrays, a channel between the antenna array of the first network device and the antenna array of the second network device includes the N×M sub-channels, M and N are positive integers and are not both 1, and the M subarrays and the N subarrays each include at least two antennas; and generating channel information of the channel between the antenna array of the first network device and the antenna array of the second network device according to the channel information of the N×M sub-channels that is from the second network device.

Abstract: This disclosure includes a transmission scheme indication method, and a data transmission method, apparatus, and system, pertaining to the field of communications technologies. The transmission scheme indication method includes: generating transmission scheme indication information, where the transmission scheme indication information is used to indicate one of at least two transmission schemes included in a current transmission mode, and the at least two transmission schemes include a beamforming transmit diversity transmission scheme; and sending the transmission scheme indication information. This application resolves a problem of relatively low flexibility in UE data transmission, and improves flexibility in UE data transmission. This application is used for data transmission.

Abstract: This application provides a data sending method, a data receiving method, a data sending apparatus, and a data receiving apparatus. The method includes: precoding, by a transmit end device, a plurality of spatial flows, to obtain a plurality of precoded data streams, and transmitting the plurality of precoded data streams, where at least two spatial flows in the plurality of spatial flows are obtained by performing transmit diversity processing on one original spatial flow. In this way, some spatial flows in a plurality of spatial flows on a same time-frequency resource can be transmitted in a transmit-diversity-based beamforming transmission manner, and other spatial flows can be transmitted in a spatial multiplexing manner, thereby improving time-frequency resource utilization.

Abstract: Embodiments disclose an antenna information sending method and device, and an antenna information receiving method and device. The method includes: obtaining first antenna information of a terminal device, where the first antenna information includes at least one or more of a maximum number of layers for uplink spatial multiplexing that are supported by the terminal device, an antenna number supported by the terminal device, or whether the terminal device supports smart switch on/off of UE's antenna ports. The method also includes sending the first antenna information to a base station. In this way, the terminal device can control, according to a service requirement of the terminal device, an antenna deployed on the terminal device, and report antenna information of the terminal device to the base station in a timely manner.

Abstract: The present invention discloses a signal processing method and apparatus, and pertains to the field of communications technologies. The apparatus includes: a processor and a memory. The method includes: setting each sampling point signal on an orthogonal frequency division multiplexing OFDM symbol, and obtaining an input signal; calculating a constraint matrix according to a frequency selective fading channel characteristic; and calculating an output signal according to the sampling point signal, the input signal, and the constraint matrix. The present invention resolves a problem that frequency selective fading has an impact on transmission of the OFDM symbol, and a constraint matrix obtained according to a flat fading channel characteristic is not applicable to the OFDM symbol, thereby achieving an effect of reducing the impact of the frequency selective fading on the transmission of the OFDM symbol.

Abstract: This disclosure relates to the field of communications technologies, and discloses a configuration information transmission method, apparatus, and system. The method includes: determining, by a base station, configuration information corresponding to a target group, where the configuration information is used to indicate a CSI-RS configuration of UE in the target group, the target group includes at least two UEs, and CSI-RS configurations of all UEs in the target group are the same; and sending, by the base station in a first preset time-frequency resource area, the configuration information to the UE in the target group. This application resolves a problem of relatively high signaling overheads, thereby achieving an effect of reducing signaling overheads. This application is applied to configuration information transmission.

Abstract: An adaptive multi-antenna data transmission method, apparatus, and system are provided. The adaptive multi-antenna data transmission method includes: acquiring, at a current time interval, a beam adjustment parameter of user equipment UE; adjusting a beam width of the UE according to the beam adjustment parameter of the UE; and performing precoding processing on to-be-transmitted data of the UE according to an adjusted beam width of the UE and direction information of the UE, so as to perform data transmission. A beam width of UE is adjusted, so that a direction of a beam during data transmission can better match a direction of the UE. Therefore, a status or quality of a link for the UE is improved and a performance loss is reduced.

Abstract: A camera module includes an optical lens unit and a light sensing unit. The light sensing unit is provided along a light outgoing path of the optical lens unit so that the light sensing unit is able to sense light emitted from the optical lens unit. The light sensing unit further includes a photoelectric converting element and a conducting unit connected to the photoelectric converting element. The conducting unit transfers electrical signals converted and generated during operation of the photoelectric converting element, and conducts heat generated during operation of the photoelectric converting element outside.

Abstract: Embodiments of the present invention disclose a base station, including: a first channel state information acquiring module, configured to acquire channel state information of dimension-reduced channel subspace by means of level-one channel state information measurement; a set determining module, configured to: schedule the user equipment, and determine a set of user equipment involved in multiple-input multiple-output; a second channel state information acquiring module, configured to: perform level-two channel state information measurement on user equipment in the set of user equipment to acquire state information of a dimension-reduced real-time channel; and a data sending module, configured to: process downlink data and a user-specific demodulation reference signal by means of two-level precoding, and send processed downlink data and a processed user-specific demodulation reference signal to the user equipment in the set of user equipment.

Abstract: A camera module includes an optical lens, a photosensitive sensor and an electrical support. The electrical support includes a circuit arrangement embedded in a support body to form an integral structure, a connecting member provided on the support body to electrically connect with the circuit arrangement, and a camera component coupled at the support body and electrically connected to the connecting member. Therefore, the electrical support not only forms a circuit board to electrically connect with the camera component but only serves as a base to support the camera component.

Abstract: A “breadboard” approach by which a biochemical pathway under study is separated or segmented into smaller portions, at least one of which can to a degree of approximation be accurately emulated with a replica microscale and/or nanoscale fluidic implementation whose constituent species, inhibitor(s), catalyst(s) and other reaction agent(s) can be closely controlled and at least one aspect of whose behavior can be measured. Control and measurement information interfaces with a computer that executes algorithms comprising one or more of a control process, control event-script, experiment, data recording, and mathematical model. A model can be used to simulate the actions, behavior, or other aspects of another portion of the biochemical signaling process, pathway, or network.

Abstract: The present disclosure provides a camera module and an electrical bracket thereof. The electrical bracket is provided with a clear aperture. The electrical bracket not only has the functions of a conventional circuit board (conduction of the electrical signal of an electronic device such as a chip and a motor), but also has the effects of a conventional base to support an optical filter and serve as a motor base bracket.