A multi-source cooperative scheme based on IDMA aided superposition modulation

In this work, we propose a novel superposition modulated cooperative scheme for the scenario with multiple source nodes. With the proposed scheme, multiple source nodes are divided into several subsets to cooperate in a Time Division Duplexing (TDD) manner. The transmission of each node is a superimposed signal consists of its own information and the estimated data of nodes in the previous subset. Interleave Division Multiple Access (IDMA) is employed to sperate different nodes. The subset partition is also analyzed and the ways to get a tradeoff between performance and system complexity is shown. Simulation results are finally provided to show the performance of the proposed scheme.