Paper Info
Title
Relaying via Cooperative Jamming in Covert Wireless Communications.
Abstract
In this work, a covert communication scheme under block-fading channels is proposed where the relay, apart from forwarding source's information to the destination, also acts as a cooperative jammer. Stating precisely, the relay amplifies source's signal when required to relay the signal to the destination, otherwise it transmits artificial noise with random power, causing errors in the received signal statistics of the adversary, Willie, who employs a radiometer for detection of covert transmissions. Stating the condition under which Willie makes detection errors, we first find the optimal detection threshold of Willie's detector and his minimum detection error probability and then derive the expected value of this error probability, establishing Willies detection performance from the perspective of the covert communication pair. Furthermore, for a given maximum transmit power at the relay, we derive a closed-form expression for the optimal transmit power of covert communication. Our numerical results illustrate the advantage cooperative jamming offers for achieving covertness, and demonstrate how the choice of transmit power used for covert transmissions is affected by Willie's error performance and required level of covertness.
Year
DOI
Venue
2018
10.1109/ICSPCS.2018.8631772
ICSPCS
Keywords
Field
DocType
Relays,Jamming,Wireless communication,Detectors,Error probability,Communication system security,Physical layer security
Transmitter power output,Wireless,Computer science,Covert,Computer network,Communication channel,Artificial noise,Detector,Jamming,Relay
Conference
ISBN
Citations 
PageRank 
978-1-5386-5602-0
0
0.34
References 
Authors
0
1
Name
Order
Citations
PageRank
Khurram Shahzad116525.77