Fast Power Allocation for Secure Communication With Full-Duplex Radio

This paper considers a method for improving physical layer security of wireless networks with full-duplex radio. In particular, fast algorithms are developed to compute power allocations in subcarriers, subject to power and rate constraints, to maximize the secrecy capacity of a three-node network c...

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Published inIEEE transactions on signal processing Vol. 65; no. 14; pp. 3846 - 3861
Main Authors Chen, Lei, Zhu, Qiping, Meng, Weixiao, Hua, Yingbo
Format Journal Article
LanguageEnglish
Published IEEE 15.07.2017
Subjects
Full-duplex
Interference
multicarrier
OFDM
Physical layer
physical layer security
power allocation
Resource management
secure communication
Security
Signal processing algorithms
Signal to noise ratio
Wireless networks
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ISSN1053-587X
1941-0476
DOI10.1109/TSP.2017.2701318

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Abstract This paper considers a method for improving physical layer security of wireless networks with full-duplex radio. In particular, fast algorithms are developed to compute power allocations in subcarriers, subject to power and rate constraints, to maximize the secrecy capacity of a three-node network consisting of a source, a full-duplex destination, and an eavesdropper. A residual level of radio self-interference channel is considered. The optimal power allocation at the destination is found to be significant especially when its power budget is high. Also studied in this paper are a network with multiple full-duplex destinations and another network with multiple sources. Using the algorithms developed in this paper, we are able to show that a multiuser strategy that optimizes the power distributions among the users (in terms of either the sources or the destinations) can yield a substantial gain of secrecy capacity over a single-user strategy.
AbstractList This paper considers a method for improving physical layer security of wireless networks with full-duplex radio. In particular, fast algorithms are developed to compute power allocations in subcarriers, subject to power and rate constraints, to maximize the secrecy capacity of a three-node network consisting of a source, a full-duplex destination, and an eavesdropper. A residual level of radio self-interference channel is considered. The optimal power allocation at the destination is found to be significant especially when its power budget is high. Also studied in this paper are a network with multiple full-duplex destinations and another network with multiple sources. Using the algorithms developed in this paper, we are able to show that a multiuser strategy that optimizes the power distributions among the users (in terms of either the sources or the destinations) can yield a substantial gain of secrecy capacity over a single-user strategy.
Author Lei Chen
Qiping Zhu
Weixiao Meng
Yingbo Hua
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SubjectTerms Full-duplex
Interference
multicarrier
OFDM
Physical layer
physical layer security
power allocation
Resource management
secure communication
Security
Signal processing algorithms
Signal to noise ratio
Wireless networks
Title Fast Power Allocation for Secure Communication With Full-Duplex Radio
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