Coded CDMA in cooperative channels

In this paper, a new structure for cooperative channels based on coded code division multiple access (CDMA) is proposed. CDMA, with the special structure of cooperative schemes can increase the sum capacity of wireless channels and improve the quality of user-partner link that enhances the overall performance of the system. This structure is simulated for 4 state systematic convolutional code in single user and multiuser cases with Gold spreading sequences for user-partner link with different Rice factor and Rayleigh propagation for user-receiver and partner-receiver links. Simulations confirm the efficiency of this scheme especially in user-partner links with high Rice factor.