Interference suppression in heterogeneous massive MIMO systems with imperfect CSI

Rana Sedghi and Masoumeh Azghani ()
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Rana Sedghi: Sahand University of Technology
Masoumeh Azghani: Sahand University of Technology

Telecommunication Systems: Modelling, Analysis, Design and Management, 2022, vol. 81, issue 2, No 10, 323-332

Abstract: Abstract Interference management is of paramount importance in heterogeneous massive mimo networks (HetNet). In this paper, an algorithm has been suggested to suppress the interference in large-MIMO HetNets with imperfect channel state information(CSI). The proposed technique controls both the intra-tier and cross-tier interference of the macrocell as well as the small cells. The intra-tier interference of the macrocell as well as the cross-tier interference have been minimized under maximum transmission power and minimum signal to interference and noise ratio (SINR) constraint. The channel estimation error matrix has also been modeled using the joint sparsity property. The precoding algorithm is thus achieved through the application of semi-definite relaxation and block coordinate descent techniques. The intra-tier interference of the small cells are addressed with the aid of the zero forcing scheme. The proposed method has been validated through various simulations which confirm the superiority of the algorithm over its counterparts.

Keywords: Massive MIMO system; Heterogeneous networks (HetNet); Interference suppression; Interference management (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (1)

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DOI: 10.1007/s11235-022-00932-z

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