Physical Layer Security with Uncoordinated Helpers Implementing Cooperative Jamming

A wireless communication network is considered, consisting of a source (Alice), a destination (Bob) and an eavesdropper (Eve), each equipped with a single antenna. The communication is assisted by multiple helpers, each equipped with two antennas, which implement cooperative jamming, i.e., transmitt...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Luo, Shuangyu, Li, Jiangyuan, Petropulu, Athina
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 29.02.2012
Subjects
Antennas
Jamming
Noise
Optimization
Wireless communications
Wireless networks
Online AccessGet full text

Cover

More Information
Summary:A wireless communication network is considered, consisting of a source (Alice), a destination (Bob) and an eavesdropper (Eve), each equipped with a single antenna. The communication is assisted by multiple helpers, each equipped with two antennas, which implement cooperative jamming, i.e., transmitting noise to confound Eve. The optimal structure of the jamming noise that maximizes the secrecy rate is derived. A nulling noise scenario is also considered, in which each helper transmits noise that nulls out at Bob. Each helper only requires knowledge of its own link to Bob to determine the noise locally. For the optimally structured noise, global information of all the links is required. Although analysis shows that under the two-antenna per helper scenario the nulling solution is sub-optimal in terms of the achievable secrecy rate, simulations show that the performance difference is rather small, with the inexpensive and easy to implement nulling scheme performing near optimal.
ISSN:2331-8422