A Complete Receiver Solution for a Chaotic Direct Sequence Spread Spectrum Communication System

Mihai Bogdan Luca (1, 2, 3) , S Azou (1, 2) , Gilles Burel (1, 2) , Alexandru Serbanescu (3)

1 LEST - Laboratoire d'Electronique et Systèmes de Télécommunications
2 UBO - Université de Brest
3 MTA - ATM - Military Technical Academy - Académie Technique Militaire [Bucharest, Romania]

This paper is devoted to receiver design in a chaotic direct-sequence spread spectrum (CD3S) digital communication system. The demodulation is achieved through chaos synchronization in an efficient manner thanks to dual unscented Kalman filtering. The problem of carrier phase recovery, frequently neglected in chaos-based communication systems, is addressed either through Costas loop prior to demodulation or by dual estimation of the code, symbol and phase in baseband. The input signal power fluctuations, which often causes large errors in synchronizing chaotic waveforms, is also taken into account. Numerical simulations are provided to show the significance of the proposed receiver for both additive white Gaussian noise (AWGN) channel and a nonstationary channel.

Mots clés: Chaotic communication; Spread spectrum communication; AWGN; Demodulation; Digital communication; Kalman filters; Filtering; Phase estimation; Baseband; Fluctuations

Domaines: Traitement du signal et de l'image [eess.SP]; Réseaux et télécommunications [cs.NI]

Mihai Bogdan Luca, S Azou, Gilles Burel, Alexandru Serbanescu. A Complete Receiver Solution for a Chaotic Direct Sequence Spread Spectrum Communication System. IEEE Int. Symp. on Circ. and Syst., May 2005, Kobe, Japan. ⟨10.1109/ISCAS.2005.1465461⟩. ⟨hal-01508707⟩