Performance of Cooperative Spatial-Interleaved Superposition Modulation in Fading Multiple-Access Channels

In this paper, we propose a new superposition- modulation based cooperative multiple-access scheme. In this scheme, each user only superimpose the information from the previous user, where the full diversity is achieved by cooperative spatial-interleaving. Focusing on interference cancellation with minimum mean square error filtering at the destination, we derive a lower bound on the frame error probability of the scheme. We show that the bound can be used to predict the frame error rate of the scheme. Moreover, we show that full diversity gain is achieved and the detection complexity is reduced as compared to the previous scheme.