Permutation-based DCSK and multiple-access DCSK systems

Author

Lau, Francis C M ; Cheong, Kai Y. ; Tse, Chi K.

Author_Institution

Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., China

Volume

50

Issue

6

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

733

Lastpage

742

Abstract

This paper presents a method for enhancing the differential chaos-shift-keying (DCSK) and multiple access DCSK systems. By introducing a permutation transformation which destroys the similarity between the reference and data samples in a DCSK system, the bit rate can be made undetectable from the frequency spectrum, thereby enhancing the data security. Using different transformations for different users, the interference between users in a multiple-access system can be minimized, and each symbol is ensured to be sent within one bit duration for all users. Furthermore, the implementation requires only slight modification to the original DCSK system.

Keywords

chaotic communication; interference suppression; modulation; multi-access systems; security of data; DCSK system; bit rate; communication system; data security; differential chaos shift keying; frequency spectrum; interference minimization; multiple-access DCSK system; permutation transformation; Bandwidth; Bit error rate; Bit rate; Chaotic communication; Data security; Fading; Frequency synchronization; Multiaccess communication; Multiple access interference; Spread spectrum communication;

fLanguage

English

Journal_Title

Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on

Publisher

ieee

ISSN

1057-7122

Type

jour

DOI

10.1109/TCSI.2003.812616

Filename

1208614