Simultaneous 5 GHz co-channel multiple-input multiple-output links at microcellular boundaries: interference or cooperation?

Simultaneous real-time 4 times 4 multiple-input multiple-output measurements from three base stations to the same mobile are analysed. Such measurements can be applied to determine the realtime scale of interference from neighbouring cells due to lack of orthogonality between their respective eigenvectors. Also, new and existing schemes are compared that can be applied in equally valid ways to suppress or take advantage of the unwanted base station links at cellular boundaries; thus it opens up the possibility of either interference or cooperation on a microcellular boundary.