On the degrees of freedom of time correlated MISO broadcast channel with delayed CSIT

Mari Kobayashi (1) , Sheng Yang (1) , David Gesbert (2) , X. Yi (2)

1 E3S - Supélec Sciences des Systèmes
2 Eurecom [Sophia Antipolis]

We consider the time correlated MISO broadcast channel where the transmitter has partial knowledge on the current channel state, in addition to delayed channel state information (CSI). Rather than exploiting only the current CSI, as the zero-forcing precoding, or only the delayed CSI, as the Maddah-Ali-Tse (MAT) scheme, we propose a seamless strategy that takes advantage of both. The achievable degrees of freedom of the proposed scheme is characterized in terms of the quality of the current channel knowledge.

Domaines: Théorie de l'information et codage [math.IT]; Théorie de l'information [cs.IT]

Mari Kobayashi, Sheng Yang, David Gesbert, X. Yi. On the degrees of freedom of time correlated MISO broadcast channel with delayed CSIT. 2012 IEEE International Symposium on Information Theory Proceedings, Jul 2012, Cambridge, MA, United States. pp.2501 - 2505, ⟨10.1109/ISIT.2012.6283967⟩. ⟨hal-00749287⟩