Patent ID: 7957701

Claim:
A method implemented in a base station having a plurality of antennas, comprising: associating at least one user with at least one first code word selected from at least one first code book wherein associating said at least one user with said at least one first codeword selected from said at least one first codebook comprises: transmitting a plurality of pilot signals from the plurality of antennas; receiving information indicative of said at least one first code word and said at least one first code book from said at least one user in response to transmitting the plurality of pilot signals; and selecting said at least one user based on a sum weight criterion; receiving feedback from at least one user in response to transmitting a first frame to said at least one user, the first frame formed by pre-coding at least one symbol using at least one first code word selected from at least one first code book associated with said at least one user; and transmitting at least one second frame to said at least one user, said at least one second frame being pre-coded using at least one second codeword selected from at least one second codebook, said at least one second codebook being determined based on the feedback and said at least one first codeword.