Fundamentals of statistical signal processing: estimation theory
Fundamentals of statistical signal processing: estimation theory
Using encryption for authentication in large networks of computers
Communications of the ACM
Space-Time Block Coding for Wireless Communications
Space-Time Block Coding for Wireless Communications
Convex Optimization
Fixed SINR solutions for the MIMO wiretap channel
ICASSP '09 Proceedings of the 2009 IEEE International Conference on Acoustics, Speech and Signal Processing
Amplify-and-forward based cooperation for secure wireless communications
ICASSP '09 Proceedings of the 2009 IEEE International Conference on Acoustics, Speech and Signal Processing
On the impact of quantized channel feedback in guaranteeing secrecy with artificial noise
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 4
A Novel Approach for Physical Layer Cryptography in Wireless Networks
Wireless Personal Communications: An International Journal
Training signal design for discriminatory channel estimation
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Design and implementation of physical layer private key setting for wireless networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Secure transmission with multiple antennas I: the MISOME wiretap channel
IEEE Transactions on Information Theory
Transmit signal design for optimal estimation of correlated MIMO channels
IEEE Transactions on Signal Processing
Guaranteeing Secrecy using Artificial Noise
IEEE Transactions on Wireless Communications
Secure space-time communication
IEEE Transactions on Information Theory
MIMO Broadcast Channels With Finite-Rate Feedback
IEEE Transactions on Information Theory
On the Blind Identifiability of Orthogonal Space–Time Block Codes From Second-Order Statistics
IEEE Transactions on Information Theory
On the Secrecy Capacity of Fading Channels
IEEE Transactions on Information Theory
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This paper proposes a training-based channel estimation scheme for achieving quality-of-service discrimination between legitimate and unauthorized receivers in wireless multiple-input multiple-output (MIMO) channels. The proposed method has applications ranging from user discrimination in wireless TV broadcast systems to the prevention of eavesdropping in secret communications. By considering a wireless MIMO system that consists of a multiple-antenna transmitter, a legitimate receiver (LR) and an unauthorized receiver (UR), we propose a multi-stage training-based discriminatory channel estimation (DCE) scheme that aims to optimize the channel estimation performance of theLRwhile limiting the channel estimation performance of the UR. The key idea is to exploit the channel estimate fed back from the LR at the beginning of each stage to enable the judicious use of artificial noise (AN) in the training signal. Specifically, with knowledge of the LR's channel, AN can be properly superimposed with the training data to degrade the UR's channel without causing strong interference on the LR. The channel estimation performance of the LR in earlier stages may not be satisfactory due to the inaccuracy of the channel estimate and constraints on the UR's estimation performance, but can improve rapidly in later stages as the quality of channel estimate improves. The training data power and AN power are optimally allocated by minimizing the normalized mean-square error (NMSE) of the LR subject to a lower limit constraint on the NMSE of the UR. The proposed DCE scheme is then extended to the case with multiple LRs and multiple URs. Simulation results are presented to demonstrate the effectiveness of the proposed DCE scheme.