TY - JOUR
T1 - Three artificial-noise-aided secure transmission schemes in wiretap channels
AU - Yan, Shihao
AU - Yang, Nan
AU - Land, Ingmar
AU - Malaney, Robert
AU - Yuan, Jinhong
PY - 2018/4
Y1 - 2018/4
N2 - 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.
AB - 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.
KW - Artificial noise
KW - Physical layer security
KW - power allocation
KW - secure transmission
KW - wiretap code rates
UR - http://www.scopus.com/inward/record.url?scp=85037611147&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/arc/DP150103905
U2 - 10.1109/TVT.2017.2779508
DO - 10.1109/TVT.2017.2779508
M3 - Article
SN - 0018-9545
VL - 67
SP - 3669
EP - 3673
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 4
ER -