Abstract
This brief studies the performance of selected chaos-based systems which share their frequency bands with conventional spread-spectrum systems. Such a scenario may occur in normal practice when chaos-based systems are introduced while the conventional systems are still in operation. The particular chaos-based systems under study are the coherent chaos-shift-keying system and the noncoherent differential chaos-shift-keying system, and the coexisting conventional system employs the standard direct-sequence spread-spectrum modulation scheme. Analytical expressions for the bit-error rates are derived in terms of system parameters such as spreading factor, chaotic signal power, conventional spread-spectrum signal power, and noise power spectral density. Finally, computer simulations are performed to verify the analytical findings.
Original language | English |
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Pages (from-to) | 1475-1481 |
Number of pages | 7 |
Journal | IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications |
Volume | 50 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1 Nov 2003 |
Keywords
- Chaos communication
- Chaos shift keying (CSK)
- Coexistence
- Differential chaos shift keying (DCSK)
- Differential sequence spread spectrum
ASJC Scopus subject areas
- Electrical and Electronic Engineering