Patent ID: 9379800
Filing Date: 2016-06-28
CPC Classification: H04B,H04L

Claim Text:
1. A method for channel state information feedback, comprising: via a channel estimating processor, estimating channel state information from the mobile terminal to a serving cell and neighboring cells according to channel state information reference signals (CSI-Reference Signal) received from a plurality of coordinating cells; via a matrix calculating processor, calculating a precoding matrix based on the estimated channel state information of the serving cell as a function of a left singular matrix of channel estimation of the serving cell of a j-th mobile terminal; via a precoding processor, calculating precoded channel state information respectively for the serving cell of the mobile terminal and neighboring cells in the coordinating cells according to the obtained precoding matrix; via a feeding back processor, feeding the precoded channel state information back to the serving cell of the mobile terminal; via a receiver, receiving a signal transmitted using the precoded channel state information fed back to the serving cell; wherein calculating the precoding matrix comprises using the following formula: wherein W