• Publications
  • Influence
On Cooperative Relaying Schemes for Wireless Physical Layer Security
TLDR
We consider a cooperative wireless network in the presence of one or more eavesdroppers, and exploit node cooperation for achieving physical (PHY) layer based security. Expand
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Improving Physical Layer Secrecy Using Full-Duplex Jamming Receivers
TLDR
This paper investigates an alternative solution, which assumes the availability of a full duplex (FD) receiver. Expand
  • 294
  • 14
  • PDF
On Ergodic Secrecy Rate for Gaussian MISO Wiretap Channels
  • J. Li, A. Petropulu
  • Mathematics, Computer Science
  • IEEE Transactions on Wireless Communications
  • 20 January 2011
TLDR
We study the problem of finding the optimal input covariance that maximizes the ergodic secrecy rate subject to a power constraint, where only statistical information about the eavesdropper channel is available at the transmitter. Expand
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Explicit Solution of Worst-Case Secrecy Rate for MISO Wiretap Channels With Spherical Uncertainty
  • J. Li, A. Petropulu
  • Computer Science, Mathematics
  • IEEE Transactions on Signal Processing
  • 30 July 2011
TLDR
A multiple-input single-output (MISO) wiretap channel model is considered, in which a multi-antenna source communicates with a single-Antenna destination in the presence of one single-antenne eavesdropper. Expand
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Uncoordinated Cooperative Jamming for Secret Communications
TLDR
We consider a Gaussian wiretap channel model with a single-antenna source, destination and eavesdropper. Expand
  • 60
  • 4
Cooperative Transmission for Relay Networks Based on Second-Order Statistics of Channel State Information
TLDR
Cooperative transmission in relay networks is considered, in which a source transmits to its destination with the help of a set of cooperating nodes. Expand
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Transmitter Optimization for Achieving Secrecy Capacity in Gaussian MIMO Wiretap Channels
TLDR
We study the problem of finding the optimal input covariance m atrix that achieves secrecy capacity subject to a power constraint, which leads to a non-convex optimization problem that is in general difficult to solve. Expand
  • 60
  • 4
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Ergodic Secrecy Rate for Multiple-Antenna Wiretap Channels With Rician Fading
  • J. Li, A. Petropulu
  • Computer Science
  • IEEE Transactions on Information Forensics and…
  • 1 September 2011
TLDR
We study the problem of finding the optimal input covariance that maximizes the ergodic secrecy rate subject to a power constraint, assuming that full information on the legitimate channel is available to the transmitter, but only statistical information on eavesdropper channel is known. Expand
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Optimal input covariance for achieving secrecy capacity in Gaussian MIMO wiretap channels
  • J. Li, A. Petropulu
  • Computer Science
  • IEEE International Conference on Acoustics…
  • 14 March 2010
TLDR
We study the problem of finding the optimal input covariance that achieves secrecy capacity of the Gaus- sian MIMO wiretap channel subject to a power constraint, which in general leads to a difficult non-convex optimization problem. Expand
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Using simple relays to improve physical-layer security
TLDR
This paper studies different uses of two cooperating relays to improve the secrecy rate of a wiretap channel. Expand
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