Space-time encoded secure chaos communications with transmit beamforming

Lau, Y, Lin, K and Hussain, Z 2005, 'Space-time encoded secure chaos communications with transmit beamforming', in R. Harris (ed.) Proceedings of the TENCON 2005 IEEE Region 10 Conference, Melbourne, Australia, 21-24 November 2005.


Document type: Conference Paper
Collection: Conference Papers

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Title Space-time encoded secure chaos communications with transmit beamforming
Author(s) Lau, Y
Lin, K
Hussain, Z
Year 2005
Conference name TENCON IEEE Region 10 Conference
Conference location Melbourne, Australia
Conference dates 21-24 November 2005
Proceedings title Proceedings of the TENCON 2005 IEEE Region 10 Conference
Editor(s) R. Harris
Publisher IEEE
Place of publication Melbourne
Abstract It is shown that the use of chaos shift keying (CSK) with a transmit diversity technique such as beamforming and space-time coding can provide a secure communication link with improvement in the system error performance. Spreading sequences that are used to scramble data in spread spectrum (SS) systems can be generated using a single mathematical relationship of a chaotic generator. These chaotic sequences are very difficult to predict over long-term chaotic pattern unless the exact initial condition of the chaotic generator is known, providing security. On the other hand, beamforming and orthogonal space-time block coding (OSTBC) transmit diversity techniques are known to provide optimal transmitting structures for communication systems, especially if combined. Based on the signal angle-of-arrival (AoA) estimates, the channel correlation matrix can be constructed, and it is shown that signal transmission of OSTBC codes in the eigen-modes of this matrix gives an effective array weighting gain which improves system error performance without sacrificing any diversity and coding gain. A performance study of CSK with beamforming and space-time encoded is carried out in this paper.
Subjects Broadband and Modem Technology
Keyword(s) beamforming
data security
modems
DOI - identifier 10.1109/TENCON.2005.301120
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