Private communication over fading channels with chaotic DS/SS

• Published in: 2004 IEEE International Conference on Acoustics, Speech, and Signal Processing Vol. 4; pp. iv - 957
• Main Authors: Yongsun Hwang, Papadopoulos, H.C.
• Format: Conference Proceeding
• Language: English
• Published: Piscataway, N.J IEEE 2004
• Subjects: Applied sciences; Chaos; Chaotic communication; Educational institutions; Exact sciences and technology; Fading; Interchannel interference; Multiaccess communication; Physical layer; Piecewise linear techniques; Privacy; Secret; Spread spectrum communication; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Fading channels; Chaos; Error probability; Telecommunication system; Transmission channel; Spread spectrum; Direct sequence; Telecommunication security; Signal to noise ratio
• ISBN: 9780780384842; 0780384849
• ISSN: 1520-6149; 2379-190X
• DOI: 10.1109/ICASSP.2004.1326987

We consider chaotic spread spectrum (DS/SS) systems for secure communication over fading channels, whereby a symbol stream is linearly modulated on a spreading sequence generated by iterating an initial condition through a suitably chosen chaotic map. For a class of these systems, we develop methods for quantifying the uncoded probability of error, Pr(/spl epsiv/), of unintended receivers that do not know the initial condition. We show that the Pr(/spl epsiv/) of unintended receivers exploiting K degrees of diversity decays as 1//spl radic/(SNR), in contrast to the intended receiver Pr(/spl epsiv/) that decays as 1/(SNR)/sup K/, demonstrating that these systems can provide reliable and private communication over fading channels.