A method and apparatus for spatial multiplexing of spectrally overlapping communications signals which does not require use of a training signal, computationally intensive direction-finding methods, or antenna calibration is presented. An adaptive antenna array at a base station is used in conjunction...http://www.google.de/patents/US5260968?utm_source=gb-gplus-sharePatent US5260968 - Method and apparatus for multiplexing communications signals through blind adaptive spatial filtering
