Title :
A subspace theory for differential chaos-shift keying
Author :
Salberg, Arnt-BØrre ; Hanssen, Alfred
Author_Institution :
Inst. of Marine Res., Tromso
Abstract :
In this brief, we introduce a subspace theory for differential chaos-shift keying (DCSK) systems. We show that DCSK systems operate by transmission of chaotic signals residing in a low-dimensional subspace. The subspace formalism of DCSK schemes leads to the derivation of useful subspace detectors that can be applied to decode the DCSK signal for various types of channels. Closed form expressions for the bit error rate is derived for an M-ary FM-version of DCSK, under the assumption of orthogonal subspace generating vectors. Numerical simulations demonstrate that the proposed subspace detector in general outperforms the conventional correlation detector for DCSK
Keywords :
chaotic communication; correlation methods; modulation; M-ary FM-version; bit error rate; chaotic signals; correlation detector; differential chaos-shift keying systems; low-dimensional subspace; orthogonal subspace generating vectors; subspace detectors; subspace theory; Bit error rate; Chaos; Chaotic communication; Decoding; Detectors; Frequency; Numerical simulation; Physics; Spread spectrum communication; Wideband; Differential chaos shift keying (DCSK); subspace detectors; subspace theory;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2005.854590
