摘要:
The present invention relates to the field of mobile communications technologies, and in particular, to a signal transmission method, and an apparatus. In this solution, a technical feature of sending, to a receive end, an alternative transmission configuration corresponding to a selected first CQI is used. In this technical feature, the alternative transmission configuration sent to the receive end is an alternative transmission configuration corresponding to the selected first CQI. The technical feature can overcome disadvantages of relatively low accuracy of a signal obtained through demodulation by the receive end and relatively high feedback overheads in a signal transmission process. Therefore, the present invention can overcome the disadvantages of relatively low accuracy of a signal obtained through demodulation by the receive end and relatively high feedback overheads in the signal transmission process.
摘要:
A snapshot processing method and a related device are disclosed. The method includes: receiving a snapshot request command, where the snapshot request command includes an ID of the LUN (S101); determining the LUN according to the ID of the LUN, and setting a snapshot status of the LUN to a preparation state, where the preparation state indicates that a primary storage device enters a preparation phase of performing snapshot processing on the LUN (S102); sending a first snapshot command to a mirror storage device, where the first snapshot command includes the ID of the LUN, and the first snapshot command is used to notify the mirror storage device that the LUN is in the preparation state (S103); receiving a response message, sent by the mirror storage device, of the first snapshot command, where the response message is used to notify the primary storage device that a mirrored LUN is in the preparation state (S104); and performing snapshot processing on the LUN (S105). By means of the solution, in a snapshot process, an I/O interface does not need to be blocked or suspended, so that data consistency between a primary storage device and a mirror storage device is ensured, and a rate of a snapshot operation is improved.
摘要:
Embodiments of the present invention provide a social message monitoring method and an apparatus, the present invention relates to the communications field, and the method and apparatus can resolve a problem that a social network client cannot actively discover a social event. A specific implementation method is: receiving, by a social network server, a social message, and obtaining a theme probability vector of the social message; comparing the theme probability vector of the social message with a theme probability vector of each representative message to obtain a theme similarity, and acquiring a similarity between the social message and each representative message according to the theme similarity; saving the social message in a message class that contains a representative message most similar to the social message; and outputting the message class to a social network client when a quantity of social messages in the message class reaches a first threshold or themes of social messages in the message class are consistent. The present invention is used to implement social message monitoring.
摘要:
The present invention provides an FBMC transmit diversity transmission method, a transmit end apparatus, and a receive end apparatus. The method includes: obtaining a to-be-transmitted data sequence, where the to-be-transmitted data sequence includes 2*M*N pieces of data; performing transmit diversity processing on the to-be-transmitted data sequence to obtain FBMC signals of a first antenna and a second antenna, where a precoding matrix is (I) or (II), a matrix that includes the FBMC signals of the first antenna and the second antenna is (III), a matrix that includes the to-be-transmitted data sequence is (IV), 0‰¤ i‰¤ M-1, 0‰¤ j ‰¤N-1, Y=WX, the 2*M*N pieces of data of the to-be-transmitted data sequence are denoted by x (0) ( k,l ) and x (1) ( k,l ), 0‰¤ k‰¤ M-1, 0‰¤ l ‰¤N-1, FBMC signals of the first antenna and the second antenna on an r th subcarrier and an s th symbol are denoted by y (0) ( r , s ) and y (1) ( r , s ), 0‰¤ r ‰¤2M-1, and 0‰¤ s ‰¤N-1; and transmitting the FBMC signals of the first antenna and the second antenna.
摘要:
An FBMC signal transmitting method and receiving method, a transmitter, and a receiver are provided. The transmitting method includes: generating offset quadrature amplitude modulation OQAM symbols included on at least two subbands; mapping an OQAM symbol on each subband onto a respective subcarrier to obtain a frequency-domain signal, where a first frequency interval exists between adjacent subcarriers in a same subband, a second frequency interval exists between adjacent subcarriers that belong to two adjacent subbands, the second frequency interval is a sum of the first frequency interval and a guard band interval, and the guard band interval is a fractional multiple of the first frequency interval; generating an FBMC signal out of the frequency-domain signal; and transmitting the FBMC signal to a receiver.
摘要:
Disclosed are a method and device for sending a user-specific reference signal, which relate to the field of communications and are used for solving the problem of poor performance of a communication system due to the fact that the user-specific reference signal is sent in the communication system using nonlinear precoding. The method includes: determining a modulus identification, and performing interference elimination processing on a user-specific reference signal according to the modulus identification to obtain the user-specific reference signal after the interference elimination processing; performing beamforming processing on the user-specific reference signal after the interference elimination processing to obtain a beamforming reference signal; and performing inverse fast fourier transform (IFFT) and digital-analogue conversion on the beamforming reference signal to obtain an analogue signal of the user-specific reference signal, and sending the analogue reference signal to a user terminal.
摘要:
The present invention provides a signal sending method and a signal sending device, where the signal sending method includes: canceling interference from symbols of a boundary between at least two precoding code blocks in a multiple input multiple output filter bank multicarrier MIMO-FBMC system, where the precoding code block includes at least one time-frequency resource element that uses same precoding; performing precoding on a to-be-sent symbol in the precoding code block to obtain a precoded symbol; and sending the precoded symbol. In the present invention, mutual interference between precoding code blocks at a time-frequency critical location can be completely or partially canceled.
摘要:
Embodiments of the present invention provide a precoding method, a base station and a user equipment, relate to a communication field, may select a nonlinear precoding solution adaptively, and improve a system performance. The precoding method comprises: a base station acquires predetermined parameter(s) of at least one user equipment; calculates the acquired predetermined parameter(s) to obtain a calculation performance index; selects a target precoding solution according to the calculation performance index; precodes data information of all the user equipment(s) according to the target precoding solution; if the target precoding solution is a nonlinear precoding solution, sends the data information and indication signalling indicating information of the nonlinear precoding solution to each user equipment; and the user equipment receives the data information and the indication signalling which are sent by the base station; selects a receiver according to a receiver type obtained according to the indication signalling; and detects the received data information using the selected receiver. The embodiments of the present invention are used for precoding in an MIMO system.