Journal
IEEE COMMUNICATIONS LETTERS
Volume 19, Issue 12, Pages 2174-2177Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LCOMM.2015.2490138
Keywords
Physical layer security; uncoordinated CJ; power allocation; secrecy outage; DC programming
Categories
Funding
- NSFC [61172092, 61302069]
- Foundation for Innovative Research Groups of the NSFC [61221063]
- National HighTech Research and Development Program of China [2015AA011306]
- Research Fund for the Doctoral Program of Higher Education of China [20130201130003]
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The issue of physical layer security for single-input-multiple-output (SIMO) wiretap channel with uncoordinated cooperative jamming (UCJ) is addressed in this letter, and we focus on power allocation in secrecy rate maximization (SRM) problem. Differing from the existing works, a practical UCJ scheme is proposed by using multiple single-antenna helpers where each helper transmits a jamming signal independently to confound the eavesdropper. Assuming that statistical channel state information (CSI) concerning the eavesdropper is available, a modified DC (difference of convex function) programming method is provided to solve the SRM problem under secrecy outage probability constraint and an achievable solution of power allocation is obtained. Numerical results show that the proposed scheme has satisfactory secrecy performance especially when the number of helpers is large.
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