Joint space-frequency block codes and signal alignment for heterogeneous networks

• Main Author: Ali, Syed Saqlain
• Publication Date: 2018
• Other Authors: Castanheira, Daniel, Alsohaily, Ahmed, Sousa, Elvino S., Silva, Adão, Gameiro, Atílio
• Format: Article
• Language: eng
• Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
• Download full: http://hdl.handle.net/10773/28758
• topic: Signal alignment (SA); Space frequency block codes (SFBC); Physical-layer network coding (PNC); Heterogeneous networks (HetNets); Small-cell system; Macro-cell system

In this paper, we propose a new diversity-oriented space-frequency block codes (SFBC) and signal alignment (SA) enabled physical network coding (PNC) method for the uplink of heterogeneous networks. The proposed joint Dual-SFBC with SA-PNC design substantially reduces interference and enables connecting a larger number of users when compared with methods adopting interference alignment (IA) or PNC. The main motivation behind the dual SFBC and SA-PNC design is that it allows the efficient coexistence of macro and small cells without any inter-system channel information requirements. Numerical results also verify that the proposed method outperforms the existing SA-PNC static method without any additional information exchange requirement between the two systems while achieving the main benefits of IA and SA-PNC coordinated methods recently proposed.