Secrecy Degrees of Freedom of MIMO Broadcast Channels with Delayed CSIT - CentraleSupélec
Article Dans Une Revue IEEE Transactions on Information Theory Année : 2013

Secrecy Degrees of Freedom of MIMO Broadcast Channels with Delayed CSIT

Sheng Yang
Mari Kobayashi
  • Fonction : Auteur
  • PersonId : 975381
Pablo Piantanida
Shlomo Shamai

Résumé

The degrees of freedom (DoF) of the two-user Gaussian multiple-input and multiple-output (MIMO) broadcast channel with confidential message (BCC) is studied under the assumption that delayed channel state information (CSI) is available at the transmitter. We characterize the optimal secrecy DoF (SDoF) region and show that it can be achieved by a simple artificial noise alignment (ANA) scheme. The proposed scheme sends the confidential messages superposed with the artificial noise over several time slots. Exploiting delayed CSI, the transmitter aligns the signal in such a way that the useful message can be extracted at the intended receiver but is completely drowned by the artificial noise at the unintended receiver. The proposed scheme can be interpreted as a non-trivial extension of Maddah-Ali Tse (MAT) scheme and enables us to quantify the resource overhead, or equivalently the DoF loss, to be paid for the secrecy communications.

Dates et versions

hal-00830788 , version 1 (05-06-2013)

Identifiants

Citer

Sheng Yang, Mari Kobayashi, Pablo Piantanida, Shlomo Shamai. Secrecy Degrees of Freedom of MIMO Broadcast Channels with Delayed CSIT. IEEE Transactions on Information Theory, 2013, 59 (9), pp. 5244 - 5256. ⟨10.1109/TIT.2013.2266924⟩. ⟨hal-00830788⟩
127 Consultations
0 Téléchargements

Altmetric

Partager

More