Wireless physical-layer security via transmit precoding over dispersive channels: Optimum linear eavesdropping

Chris Sperandio, Paul G Flikkema

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Scopus citations

Abstract

Multi-layer security and information assurance frameworks will become essential as potential attackers' resources continue to grow. Due to its growing use and obvious vulnerability, wireless communication is in particular need of protection. As available computational power increases, transmitters will be able to implement sophisticated preceding to increase transmission security. In this paper, we consider the security-enhancing capability of algebraic channel decomposition multiplexing (ACDM), a form of multipulse spread-spectrum preceding for dispersive wireless channels that results in in orthogonal signaling at the receiver. In ACDM, the transmit code vectors are determined from the SVD of the convolution matrix describing the channel between the transmitter and desired receiver. Since any potential transmitter-eavesdropper channel will have a different multipath structure, eavesdroppers' ability to detect and decode the transmissions can be severely reduced. We develop semi-analytical formulae for the performance penalty experienced by an eaves-dropper employing the optimum linear MMSE receiver under the worst-case assumptions that it has perfect knowledge of the transmit code set and its own channel response. Using realistic channel models we demonstrate that such an eavesdropper experiences a significant performance degradation, and show that this degradation is due to a combination of diversity loss and inter-code interference.

Original languageEnglish (US)
Title of host publicationProceedings - IEEE Military Communications Conference MILCOM
Pages1113-1117
Number of pages5
Volume2
StatePublished - 2002
Event2002 MILCOM Proceedings; Global Information GRID - Enabling Transformation Through 21st Century Communications - Anaheim, CA, United States
Duration: Oct 7 2002Oct 10 2002

Other

Other2002 MILCOM Proceedings; Global Information GRID - Enabling Transformation Through 21st Century Communications
CountryUnited States
CityAnaheim, CA
Period10/7/0210/10/02

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ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Electrical and Electronic Engineering

Cite this

Sperandio, C., & Flikkema, P. G. (2002). Wireless physical-layer security via transmit precoding over dispersive channels: Optimum linear eavesdropping. In Proceedings - IEEE Military Communications Conference MILCOM (Vol. 2, pp. 1113-1117)