A base station receives a message comprising at least one index identifying a subset of a second plurality of beamforming codewords. Each of the second plurality of beamforming codewords is identifiable by an index presented by a number of bits. The number of bits is greater than or equal to log2(N), N being number of the second plurality of beamforming codewords, and less than number of bits in representation of a corresponding beamforming codeword. The base station transmits signals employing a first plurality of beamforming codewords being selected employing the subset of the second plurality of beamforming codewords.