A joint detection based on the DS evidence theory for multi-user superposition modulation

In this paper we propose a joint dempster-shafer (DS) detection for superposition modulation (SPM) in a non-orthogonal multiple access channel with multiple antenna configuration. Signals from different users are modulated with user-specific modulation factors and then multiplexed for transmission. At the receiver, the DS joint detection recovers all users´ information simultaneously based on the DS evidence theory and the combination rules. The proposed scheme avoids the error propagation associated with the successive interference cancellation (SIC). Simulation results show that the proposed joint DS detection outperforms the conventional minimum mean square error (MMSE) and MMSE-SIC for arbitrarily chosen modulation parameters in almost all the SNR region.