Three Artificial-Noise-Aided Secure Transmission Schemes in Wiretap Channels
Date
2018
Authors
Yan, Shihao
Yang, Nan
Land, Ingmar
Malaney, Robert
Yuan, Jinhong
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Abstract
We examine the secrecy performance of three
artificial-noise-aided secure transmission schemes, namely, the
partially-adaptive, fully-adaptive, and on-off schemes. To this
end, we provide new analysis to facilitate the optimization of the
fraction ϕ of the transmit power allocated to the useful signal
and redundancy rate RE. Surprisingly, our examination indicates
that the partially-adaptive scheme, in which only the codeword
rate RB varies with the instantaneous channel gains, significantly
outperforms the on-off scheme, in which both RB and RE vary.
This performance gain can be characterized in terms of a higher
average secrecy rate, subject to an upper bound on the secrecy
outage probability. Furthermore, our results also demonstrate
that the partially-adaptive scheme can achieve almost the same
secrecy performance as the fully-adaptive scheme, which is of a
much higher complexity, where ϕ, RB, and RE all vary with the
instantaneous channel gains.
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IEEE Transactions on Vehicular Technology
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Journal article
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Open Access
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