Patent ID: 9059753
Filing Date: 2015-06-16
Classification: H04B

Abstract:
1. A method comprising: sending, by a network element to a user equipment, precoded reference signals corresponding to a plurality of logical antenna ports with one precoding codeword for each of the plurality of logical antenna ports in order for the user equipment to provide a non-codebook based channel state information feedback report; receiving by the network element from the user equipment the non-codebook based channel state information feedback report comprising information on selected one or more of the plurality of logical antenna ports, wherein the user equipment selected without the choosing a precoder, the information comprising one or more of indices r of the selected one or more of the plurality of logical antenna ports and corresponding one or more channel quality indicators for the selected one or more of the plurality of logical antenna ports, wherein the indices r are defined as where M is a number of selected logical antenna ports, N is a total number of logical antenna ports, i is an index in a summation operation, Si is an index of a selected logical antenna port, and a set {S sending data by the network element to the user equipment using the selected one or more of the plurality of logical antenna ports and the corresponding one precoding codeword for each of the selected one or more of the plurality of logical antenna ports.