A method and system are provided for scheduling data transmission in a Multiple-Input Multiple-Output (MIMO) system. The MIMO system may comprise at least one MIMO transmitter and at least one MIMO receiver. Feedback from one or more receivers may be used by a transmitter to improve quality, capacity, and scheduling in MIMO communication systems. The method may include generating or receiving information pertaining to a MIMO channel metric and information pertaining to a Channel Quality Indicator (CQI) in respect of a transmitted signal; and sending a next transmission to a receiver using a MIMO mode selected in accordance with the information pertaining to the MIMO channel metric, and an adaptive coding and modulation selected in accordance with the information pertaining to the CQI.

A diversity transmission method, a terminal, and a network-side device are provided. The diversity transmission method includes: determining, by a terminal, a target encoded codeword; and performing, by the terminal, diversity transmission based on the target encoded codeword, where the target encoded codeword meets a target encoding structure; the target encoded codeword is an encoding matrix with NN dimensions; N=2.sup.k, and k is a positive integer; the target encoding structure includes a first basic element, a second basic element, a first generation element, and a second generation element; the first generation element is an opposite number of a conjugate operation result of the first basic element, and the second generation element is a conjugate operation result of the second basic element; and the first basic element, the second basic element, the first generation element, and the second generation element are complex numbers or block matrices.