Collaborative Relay Beamforming for Secure Broadcasting

In this paper, collaborative use of relays to form a beamforming system with the aid of perfect channel state information (CSI) and to provide communication in physical-layer security between a transmitter and two receivers is investigated. In particular, we describe decode-and-forward based null space beamforming schemes and optimize the relay weights jointly to obtain the largest secrecy rate region. Furthermore, the optimality of the proposed schemes is investigated by comparing them with the outer bound secrecy rate region.

[1]  Sennur Ulukus,et al.  Achievable Rates in Gaussian MISO Channels with Secrecy Constraints , 2007, 2007 IEEE International Symposium on Information Theory.

[2]  Björn E. Ottersten,et al.  Collaborative-Relay Beamforming With Perfect CSI: Optimum and Distributed Implementation , 2009, IEEE Signal Processing Letters.

[3]  A. D. Wyner,et al.  The wire-tap channel , 1975, The Bell System Technical Journal.

[4]  Imre Csiszár,et al.  Broadcast channels with confidential messages , 1978, IEEE Trans. Inf. Theory.

[5]  H. Vincent Poor,et al.  Secrecy Capacity Region of a Multiple-Antenna Gaussian Broadcast Channel With Confidential Messages , 2007, IEEE Transactions on Information Theory.

[6]  Hesham El Gamal,et al.  On the Secrecy Capacity of Fading Channels , 2006, 2007 IEEE International Symposium on Information Theory.

[7]  Ashish Khisti,et al.  Algorithms and architecture for multiusers, multi-terminal, multi-layer information theoretic security , 2009 .

[8]  Zhu Han,et al.  Amplify-and-forward based cooperation for secure wireless communications , 2009, 2009 IEEE International Conference on Acoustics, Speech and Signal Processing.

[9]  Martin E. Hellman,et al.  The Gaussian wire-tap channel , 1978, IEEE Trans. Inf. Theory.

[10]  Roy D. Yates,et al.  Discrete Memoryless Interference and Broadcast Channels With Confidential Messages: Secrecy Rate Regions , 2007, IEEE Transactions on Information Theory.

[11]  Zhu Han,et al.  Secure wireless communications via cooperation , 2008, 2008 46th Annual Allerton Conference on Communication, Control, and Computing.