Patent ID: 8073486

Claim:
A method performed by an apparatus, the apparatus comprising at least one of the group comprising hardware and a processor executing software for designing beamforming vectors for a collaborative space division multiple access system, comprising: (a) assembling at a base station m channel matrices for m subscriber stations; (b) ranking the m channel matrices by left singular value to select a top-ranked channel matrix H from the m channel matrices; (c) jointly designing weighting and combining beamforming vectors w and v for the top-ranked channel matrix H as left and right singular vectors, respectively, of the top-ranked channel matrix H; (d) transforming any non-selected channel matrices into a nullspace of the beamforming vectors w and v; (e) selecting a next highest ranked channel matrix as the top-ranked channel matrix; and (f) repeating steps (c), (d) and (e) until beamforming vectors for all m channel matrices are designed.