Abstract:
A tower top device and a passive intermodulation cancellation method are provided. The tower top device is connected between an antenna and a radio remote unit (RRU) to perform passive intermodulation (PIM) cancellation. The tower top device includes: a model processing circuit configured to generate a cancellation signal based on an input digital transmit signal and a non-linear model, where the non-linear model is used to represent a non-linear relationship between a source signal generating PIM interference and a PIM interference signal; and a cancellation circuit connected to the model processing circuit and configured to: obtain the cancellation signal generated by the model processing circuit, and perform, based on the cancellation signal, PIM cancellation on a digital received signal including an actual PIM interference signal.
Abstract:
A handheld device includes a metal frame, two switches, and an antenna feedpoint, where two slits are disposed at the metal frame; the slits divide the metal frame into a left frame, a middle frame, and a right frame; two sides of each slit are bridged by one switch, where one of the switches is in a connected state, the other of the switches is in a disconnected state, and the two switches perform state switching when a user's finger connects a slit corresponding to the switch in a disconnected state; and the antenna feedpoint is electrically connected to the middle frame, and the left frame and the right frame are grounded, to form an antenna.
Abstract:
Embodiments disclose an uplink data transmission method and apparatus. The method includes: determining M transmission areas allocated to a terminal device, and generating first information used to indicate the M transmission areas, where M is a positive integer, and the transmission area represents an air interface time-frequency resource that includes a time range and a frequency range that are specified by a communications system. The method also includes determining, for each transmission area of the M transmission areas, second information used to indicate a transport block size. The method also includes sending an indication message to the terminal device, so that the terminal device transmits uplink data according to the indication message, where the indication message includes the first information and the second information.
Abstract:
The present disclosure describes a downlink control information transmission method and apparatus. The method includes: determining multiple terminal devices used for downlink scheduling; determining downlink control information used by the multiple terminal devices to receive downlink data flows, where the downlink control information includes common control information shared by the multiple terminal devices, dedicated control information of each of the multiple terminal devices, and device identifier information of each terminal device, and an order of the device identifier information of each terminal device is the same as an order of the dedicated control information of each terminal device; and sending the downlink control information to the multiple terminal devices.
Abstract:
A data sending method including receiving uplink data or a pilot sent by user equipment by using an uplink subframe, performing beam characteristic design according to at least one of the uplink data or the pilot, generating beam characteristic information, determining a precoding mode according to the beam characteristic information, and performing precoding processing on to-be-sent data according to the determined precoding mode where the precoding mode includes at least one of a space-time based precoding mode or a space-frequency based precoding mode and sending precoded to-be-sent data to the user equipment. The precoding mode can be flexibly selected according to at least one of uplink data or a pilot sent by user equipment.
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 terminal receiving a push message is provided. The terminal receives a push message sent by a server, determines that the push message matches a service that the terminal is allowed to receive according to a service control condition which specifies application identifiers (app IDs) corresponding to services that the terminal is allowed to receive. The terminal then performs a service processing corresponding to the received push message.
Abstract:
This application discloses an application information display method and a related device. The method includes: An electronic device detects an update event of application information of a first application, and in response to the update event, the electronic device determines whether the first application is locked by an application lock, where the application information may be a widget or a notification message; and the electronic device displays a locking view over the application message after determining that the first application is locked by the application lock.
Abstract:
The first terminal device groups to-be-sent information bits to obtain first information bits and second information bits; separately encodes the first information bits and the second information bits to obtain a first codeword sequence and a second codeword sequence; then performs interleaving processing on the first codeword sequence and the second codeword sequence based on an interleaving pattern, to obtain a first target signal; and sends the first target signal to the access network device. The access network device performs de-interleaving processing on the received first target signal based on a preset interleaving pattern, to obtain the first codeword sequence and the second codeword sequence; and separately decodes the first codeword sequence and the second codeword sequence to obtain the first information bits and the second information bits.
Abstract:
This application discloses a communication method and an apparatus. A principle of the method is as follows: A spreading factor of a spreading block is adjusted based on available resource elements REs in a time-frequency resource block, then, the spreading block is generated by using the adjusted spreading factor, and finally, the generated spreading block is mapped to the available resource elements in the time-frequency resource block for sending. In this way, a requirement that “locations of spreading blocks of a plurality of users need to be aligned” can be satisfied, and no complex symbol is discarded, so that detection performance of the spreading blocks is ensured.