Abstract

In this paper, we consider a time-division multiple-access relay channel (MARC), in which two source nodes (SNs) transmit data with different data rate to a destination node (DN) with the help of a relay node (RN). To provide asymmetric data rates, we consider joint hierarchical 16QAM (HM 16QAM) and network coding. Simulations results show that the joint HM 16QAM and network coding has similar throughput to the conventional network coding with zero padding when the RN is closer to the DN, whereas the joint 16QAM and network coding outperforms the network coding with zero padding when the RN is closer to the SNs.

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