An achievable secrecy capacity region for multiple-access wiretap channel with common message and side information

2014 ◽  
Author(s):  
Fangbiao Li ◽  
Zhi Xue
Keyword(s):  
Multiple Access ◽  
Side Information ◽  
Secrecy Capacity ◽  
Capacity Region ◽  
Wiretap Channel ◽  
Common Message

scholarly journals A Capacity-Achieving Feedback Scheme of the Gaussian Multiple-Access Channel with Degraded Message Sets

Entropy ◽  
2021 ◽  
Vol 23 (6) ◽  
pp. 756
Author(s):  
Haoheng Yuan ◽  
Bin Dai
Keyword(s):  
Multiple Access ◽  
Multiple Access Channel ◽  
Gaussian Channel ◽  
Capacity Region ◽  
Access Channel ◽  
Feedback Scheme ◽  
Point To Point ◽  
Noiseless Feedback ◽  
Common Message ◽  
Type Feedback

The classical Schalkwijk–Kailath (SK) scheme for the point-to-point white Gaussian channel with noiseless feedback plays an important role in information theory due to the fact that it is capacity-achieving and the complexity of its encoding–decoding procedure is extremely low. In recent years, it has been shown that an extended SK feedback scheme also achieves the capacity region of the two-user Gaussian multiple-access channel with noiseless feedback (GMAC-NF), where two independent messages are, respectively, encoded by two intended transmitters. However, for the two-user GMAC-NF with degraded message sets (one common message for both users and one private message for an intended user), the capacity-achieving feedback scheme remains open. In this paper, we propose a novel two-step SK-type feedback scheme for the two-user GMAC-NF with degraded message sets and show that this scheme is capacity-achieving.

scholarly journals Impact of The Correlation Between Channel Input And Side Information On Physical Layer Security Performances of Wireless Wiretap Channel

2021 ◽  
Author(s):  
Saeid Pakravan ◽  
Ghosheh Abed Hodtani
Keyword(s):  
Physical Layer Security ◽  
Side Information ◽  
Physical Layer ◽  
Secrecy Outage Probability ◽  
Capacity Region ◽  
Wiretap Channel ◽  
Channel Input ◽  
Average Secrecy Capacity ◽  
Secrecy Outage ◽  
The Impact

Abstract In this paper, a discrete memoryless wiretap channel with non-causal side information known at the encoder is considered. We (i) characterize capacity region for the Gaussian version of this channel by considering correlation between channel input and side information available at the transmitter; (ii) analyze the impact of correlation on the performance of physical layer security in a Rayleigh fading wiretap channel by deriving closed-form expressions on the average secrecy capacity (ASC) and secrecy outage probability (SOP). Further, to more show the impact of side information, asymptotic behavior of SOP is studied. Numerical evaluation of theoretical results is done finally.

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