Space Time Interference Alignment Scheme for the MIMO BC and IC with Delayed Csit and Finite Coherence Time
Interference is a major limitation in wireless networks and the search for efficient ways of transmitting in this context has been productive and diversified. Numerous techniques allow the increase of the multiplexing gain. However, most techniques, even promising linear solutions rely on perfect current CSIT which is not realistic. Though interesting results have been found concerning imperfect CSIT, feedback delay can also be an issue. However, caused a paradigm shift by proposing a scheme (MAT) yielding more than one Degree of Freedom (DoF) in the MISO BC while relying solely on perfect but completely outdated CSIT.