Fixed-rate power allocation strategies for enhanced secrecy in MIMO wiretap channels

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 gua...

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Bibliographic Details
Published in2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications pp. 344 - 348
Main Authors Mukherjee, A., Swindlehurst, A.L.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2009
Subjects
Broadcasting
Computer science
Cryptography
Degradation
Interference
MIMO
Signal design
Transmitters
Transmitting antennas
Wireless communication
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ISBN9781424436958
1424436958
ISSN1948-3244
DOI10.1109/SPAWC.2009.5161804

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Summary: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.
ISBN:9781424436958
1424436958
ISSN:1948-3244
DOI:10.1109/SPAWC.2009.5161804