Patent ID: 7801239

Claim:
An apparatus comprising: a plurality of antennas; a receiver coupled to the plurality of antennas, wherein the receiver is configured to generate a plurality of receive signals associated with transmissions from a plurality of remote devices that are detected by the plurality of antennas; at least one processor module that is configured to: produce a plurality of first covariance matrices from the plurality of receive signals; generate a plurality of derivative spatial signature matrices for the plurality of remote devices from the plurality of first covariance matrices; generate a plurality of second covariance matrices from the derivative spatial signature matrices, wherein the plurality of second covariance matrices represent interference associated with the plurality of remote devices; generate a plurality of beamforming vectors from the plurality of derivative spatial signature matrices and from the plurality of second covariance matrices; apply the plurality of beamforming vectors to signals derived from the transmissions received from the plurality of remote devices that overlap in frequency and time in order to recover transmissions sent from respective ones of the plurality of remote devices using spatial division multiplexing techniques.