Method and system for precoding data

摘要

The present disclosure relates to channel state feedback in a communication system. The method includes obtaining a reference signal from an access point; deriving a rank indication, a codebook subset selection indication and a precoding matrix index based on the obtained reference signal; sending a first feedback message conveying the rank indication and the codebook subset selection indication, and sending a second feedback message conveying the precoding matrix index, to the access point; and receiving, from the access point, data precoded by a matrix derived based on the rank indication, the codebook subset selection indication and the precoding matrix index.

主权项

1. A method for precoding data in a wireless communication system, comprising:
receiving, by a receiving device, at least one reference signal from a transmitting device; deriving, by the receiving device, a rank indication, a first codebook index in a first codebook, and two second codebook indices in a second codebook, based on the at least one reference signal; sending, by the receiving device, the rank indication, the first codebook index in the first codebook, and the two second codebook indices in the second codebook, to the transmitting device; and receiving, by the receiving device, data precoded by a second precoder and a third precoder from the transmitting device, wherein the second precoder is determined based on the first codebook index and one of the two second codebook indices, and the third precoder is determined based on the first codebook index and the other one of the two second codebook indices.