Reduced Complexity Receivers for Three-Dimensional Modulation Using Beam Hopping in 5G Systems

Three-dimensional modulation using beam hopping (3DModBH), which is a novel transmission scheme, is employed for small cell indices and two-dimensional (2-D) modulation techniques to convey the information. 3DModBH in practical interference-limited scenario in 5G systems is not yet considered. In this paper, 3DModBH in interference-limited scenario is investigated. The joint maximum likelihood (JML) receiver can be applied to retrieve the transmitted bits. However, its complexity is prohibited for practical implementation. Therefore, we suggest novel and reduced complexity receivers for 3DModBH in interference-limited scenario. Simulation results show that the proposed receiver algorithms with 3DModBH are capable of performing almost optimal performance as the 3DModBH with JML receiver, significantly outperforming the state-of-theart transmission scheme (SoAT) with JML receiver and reducing in computational complexity compared with JML receiver.