METHOD AND DEVICE FOR TRANSMITTING CHANNEL STATE INFORMATION

摘要

The present invention discloses a method and a device for transmitting channel state information, where the method includes: determining, by a first network device according to measurement of a reference signal sent by a second network device, channel state information including a precoding matrix indication PMI and selection information that is used to instruct to select a matrix element in a precoding matrix indicated by the PMI; and sending the channel state information to the second network device. Because the channel state information includes the precoding matrix indication PMI and the selection information, the second network device can determine a precoding matrix for performing precoding, and synthesize a channel precoding matrix applicable to a two-dimensional antenna. Therefore, dimensions of the synthesized precoding matrix are closer to a spatial feature of a real channel, which effectively improves precision of a precoding matrix.

主权项

1. A first network device for transmitting channel state information, comprising:
a processor, configured to determine channel state information according to measurement of a reference signal sent by a second network device, wherein the channel state information comprises a precoding matrix indication (PMI) and selection information that is used to instruct to select a matrix element in a precoding matrix indicated by the PMI; and a signal transmitter, configured to send the channel state information to the second network device.