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A multi-access Multiple-Input Multiple-Output (MIMO) relay Differential Chaos Shift Keying Cooperative Diversity (DCSK-CD) system is proposed in this paper as a comprehensive cooperation scheme, in which the relay and destination both employ multiple antennas to strengthen the robustness against signal fading in a wireless network. It is shown that, with spatial diversity gains, the Bit Error Rate (BER) performance of the proposed system is remarkably better than the conventional DCSK Non-Cooperation (DCSK-NC) and DCSK Cooperative Communication (DCSK-CC) systems. Moreover, the exact BER and close-form expressions of the proposed system are derived over Nakagami fading channels through the Moment Generating Function (MGF), which is shown to be highly consistent with the simulation results.
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