DocumentCode :
2492043
Title :
Fixed-rate power allocation strategies for enhanced secrecy in MIMO wiretap channels
Author :
Mukherjee, Amitav ; Swindlehurst, A. Lee
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of California, Irvine, CA, USA
fYear :
2009
fDate :
21-24 June 2009
Firstpage :
344
Lastpage :
348
Abstract :
This paper studies the use of artificial interference in reducing the likelihood that a confidential message transmitted between two multi-antenna nodes is intercepted by a passive eavesdropper. A portion of the transmit power is used to broadcast the information signal with just enough power to guarantee a certain data rate for the intended receiver, and the remainder of the power is used to broadcast artificial noise in order to mask the desired signal from a potential eavesdropper. The interference is designed to be orthogonal to the multiple-stream information signal when it reaches the desired receiver. A modified water-filling algorithm is proposed that balances the required transmit power with the number of spatial dimensions available for jamming the eavesdropper. Numerical results verify the increase in secrecy capacity under the proposed transmission scheme.
Keywords :
MIMO communication; antenna arrays; broadcast channels; radiofrequency interference; telecommunication security; wireless channels; MIMO wiretap channel; artificial interference; fixed-rate power allocation strategy; information signal broadcasting; modified water-filling algorithm; multi-antenna node; multiple-stream information signal; passive eavesdropper; Broadcasting; Computer science; Cryptography; Degradation; Interference; MIMO; Signal design; Transmitters; Transmitting antennas; Wireless communication;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2009. SPAWC '09. IEEE 10th Workshop on
Conference_Location :
Perugia
Print_ISBN :
978-1-4244-3695-8
Electronic_ISBN :
978-1-4244-3696-5
Type :
conf
DOI :
10.1109/SPAWC.2009.5161804
Filename :
5161804
Link To Document :
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