HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

The degrees of freedom region of temporally-correlated MIMO networks with delayed CSIT

Abstract : We consider the temporally-correlated Multiple-Input Multiple-Output (MIMO) broadcast channels (BC) and interference channels (IC) where the transmitter(s) has/have (i) delayed channel state information (CSI) obtained from a latency-prone feedback channel as well as (ii) imperfect current CSIT, obtained, e.g., from prediction on the basis of these past channel samples based on the temporal correlation. The degrees of freedom (DoF) regions for the two-user broadcast and interference MIMO networks with general antenna configuration under such conditions are fully characterized, as a function of the prediction quality indicator. Specifically, a simple unified framework is proposed, allowing to attain optimal DoF region for the general antenna configurations and current CSIT qualities. Such a framework builds upon block-Markov encoding with interference quantization, optimally combining the use of both outdated and instantaneous CSIT. A striking feature of our work is that, by varying the power allocation, every point in the DoF region can be achieved with one single scheme. As a result, instead of checking the achievability of every corner point of the outer bound region, as typically done in the literature, we propose a new systematic way to prove the achievability.
Complete list of metadata

Contributor : Catherine Magnet Connect in order to contact the contributor
Submitted on : Thursday, November 21, 2013 - 2:48:01 PM
Last modification on : Tuesday, June 15, 2021 - 4:23:49 PM

Links full text



Xinping Yi, Sheng Yang, David Gesbert, Mari Kobayashi. The degrees of freedom region of temporally-correlated MIMO networks with delayed CSIT. IEEE Transactions on Information Theory, Institute of Electrical and Electronics Engineers, 2014, 60 (1), pp.494 - 514. ⟨10.1109/TIT.2013.2284500⟩. ⟨hal-00907605⟩



Record views