SECRECY RATE MAXIMIZATION OF A MISO CHANNEL WITH MULTIPLE MULTI-ANTENNA EAVESDROPPERS VIA SEMIDEFINITE PROGRAMMING
Refereed conference paper presented and published in conference proceedings


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AbstractThe advances of multi-antenna techniques has recently led to renewed interest in physical-layer secrecy, a meaningful topic that enables us to prevent eavesdroppers from retrieving information intended for a legitimate user through physical layer designs. This paper address a secrecy-rate maximization problem for the scenario of a multi-input single-output channel listened by multiple multi-antenna eavesdroppers; e. g., in downlink. This problem is nonconvex and has no analytical solution. Through a careful analysis and reformulation, we show that the secrecy-rate maximization problem has a convex equivalent in form of a semidefinite program ( SDP). We also prove that the respective optimal transmit covariance generally can yield a rank-one structure, implying that transmit beamforming is secrecy-rate optimal in the considered scenario. Simulation results are also provided to illustrate that the optimal transmit design solved by our SDP approach can yield significantly improved secrecy rates than an existing closed-form design.
All Author(s) ListLi QA, Ma WK
Name of Conference2010 IEEE International Conference on Acoustics, Speech, and Signal Processing
Start Date of Conference14/03/2010
End Date of Conference19/03/2010
Place of ConferenceDallas
Country/Region of ConferenceUnited States of America
Detailed descriptionorganized by IEEE,
Year2010
Month1
Day1
PublisherIEEE
Pages3042 - 3045
eISBN978-1-4244-4296-6
ISSN1520-6149
LanguagesEnglish-United Kingdom
Keywordsconvex optimization; secrecy capacity; semidefinite program (SDP)
Web of Science Subject CategoriesAcoustics; Computer Science; Computer Science, Theory & Methods; Engineering; Engineering, Electrical & Electronic

Last updated on 2021-20-01 at 00:58