Secure Transmission in Cooperative Networks with Weak Eavesdroppers

In this letter, we propose a scheme to improve the secrecy rate of cooperative networks using Analog Network Coding (ANC). ANC mixes the signals in the air; the desired signal is then separated out, from the mixed signals, at the legitimate receiver using techniques like self interference subtractio...

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Bibliographic Details
Published inIEEE signal processing letters Vol. 22; no. 10; pp. 1693 - 1697
Main Authors Sunny, Albert, Sarma, Siddhartha, Kuri, Joy
Format Journal Article
LanguageEnglish
Published IEEE 01.10.2015
Subjects
Analog network coding
cooperative networks
Cooperative systems
Interference
Jamming
Physical layer
physical layer security
power allocation
Security
weak adversaries
Wireless networks
Zinc
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Summary:In this letter, we propose a scheme to improve the secrecy rate of cooperative networks using Analog Network Coding (ANC). ANC mixes the signals in the air; the desired signal is then separated out, from the mixed signals, at the legitimate receiver using techniques like self interference subtraction and signal nulling, thereby achieving better secrecy rates. Assuming global channel state information, memoryless adversaries and the decode-and-forward strategy, we seek to maximize the average secrecy rate between the source and the destination, subject to an overall power budget. Then, exploiting the structure of the optimization problem, we compute its optimal solution. Finally, we use numerical evaluations to compare our scheme with the conventional approaches.
ISSN:1070-9908
1558-2361
DOI:10.1109/LSP.2015.2425043