In this paper, two user Cooperation systems based on differential chaos shift keying (DCSK) with orthogonal sub-channel in the broadcast phase and cooperative phase using Walsh code sequence is proposed. Single relay of decode and forward (DF) type is investigated according to the conventional cooperation protocol. Outage probability is derived and verified by simulation.
Independent three paths Rayleigh and Nakagami-m fading channels are considered. Numerical results show an enhancement of the system performance for the Nakagami-m fading channel over the Rayleigh fading channel. Monte Carlo simulation shows a high agreement with the numerical results.