Secrecy Degrees of Freedom of MIMO Broadcast Channels With Delayed CSIT

@article{Yang2013SecrecyDO,
  title={Secrecy Degrees of Freedom of MIMO Broadcast Channels With Delayed CSIT},
  author={Sheng Yang and Mari Kobayashi and Pablo Piantanida and Shlomo Shamai},
  journal={IEEE Transactions on Information Theory},
  year={2013},
  volume={59},
  pages={5244-5256}
}
The degrees of freedom (DoF) of the two-user Gaussian multiple-input and multiple-output (MIMO) broadcast channel with confidential messages 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 scheme. The proposed scheme sends the confidential messages superposed with the artificial noise over several time slots… CONTINUE READING
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