DocumentCode :
2818420
Title :
Secure cognitive radio system with cooperative secondary networks
Author :
Wenli Liu ; Li Guo ; Tianyu Kang ; Jianwei Zhang ; Jiaru Lin
Author_Institution :
Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
fYear :
2015
fDate :
27-29 April 2015
Firstpage :
6
Lastpage :
10
Abstract :
In cognitive radio (CR) systems, we often use jamming schemes to improve the physical-layer security in the presence of passive eavesdroppers. However, it also needs additional signal sources to transmit artificial noise. In this paper, we investigate the multiple-input single-output (MISO) cognitive radio system where two secondary links secure each other´s communication. Each secondary transmitter (ST) sends intended messages to its own receiver while acts as a friendly jammer to the other CRN. Our target is to maximize the worst-user´s secrecy rate while limiting the interference in the direction of the primary receiver. We solve the problem through a sequence of convex semidefinite programs (SDPs) under individual power constraints. We also introduce two sub-optimal zero-forcing (ZF) beamforming methods, one of which solves the problem based on SDP and the other adopts the approach of Pareto-optimal parameterization in a more computationally efficient way.
Keywords :
array signal processing; cognitive radio; convex programming; cooperative communication; jamming; CR systems; CRN; MISO cognitive radio system; Pareto-optimal parameterization; ST; convex semidefinite programs; cooperative secondary networks; jamming schemes; multiple-input single-output cognitive radio system; physical-layer security; secondary transmitter; secure cognitive radio system; sub-optimal zero-forcing beamforming methods; Array signal processing; Cognitive radio; Interference; Noise; Optimization; Receivers; Telecommunications;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Telecommunications (ICT), 2015 22nd International Conference on
Conference_Location :
Sydney, NSW
Type :
conf
DOI :
10.1109/ICT.2015.7124648
Filename :
7124648
Link To Document :
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