Small Cell Range Expansion with Interference Mitigation for Downlink Massive MIMO HetNets

Ni, Shanjin1; Zhao, Junhui1,2; Yang, Howard H.3; Quek, Tony Q. S.3; Gong, Yi4

10.1109/GLOCOM.2018.8647788

2018

2334-0983

2018 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM)

Abu Dhabi, United arab emirates

345 E 47TH ST, NEW YORK, NY 10017 USA

IEEE

We propose a downlink cell-edge-aware zero forcing (CEA-ZF) and block diagonalization (BD) cooperative precoding scheme to reduce the downlink interference caused by the small cell range expansion in a heterogeneous network (HetNet). The CEA-ZF precoding algorithm adopted in the downlink transmission of macro base station (MBS) exploits the spatial degrees of freedom from large antenna array to suppress the inter-cell interference, and the BD precoding algorithm is introduced in the small access point (SAP) to eliminate the multi-user interference. Simulation results demonstrate the benefits of the proposed downlink precoding scheme over the alternative approach, and verify the proposed scheme as a more effective interference mitigation scheme for the downlink massive multiple-input multiple-output (MIMO) HetNet. Moreover, the optimal range expansion bias (REB) of small cell range expansion is obtained, and we also give a lower bound for the UE sum-rate of the proposed precoding scheme.

其他

英语

CPCI-S ; EI

Shenzhen Science and Technology Program[JCYJ20170817110410346]

Engineering ; Telecommunications

Engineering, Electrical & Electronic ; Telecommunications

WOS:000465774304006

20191306709052

Antenna arrays ; Communication channels (information theory) ; Degrees of freedom (mechanics) ; Expansion ; Heterogeneous networks ; MIMO systems

Biological Materials and Tissue Engineering:461.2 ; Information Theory and Signal Processing:716.1 ; Mechanics:931.1 ; Materials Science:951

Web of Science

1.Beijing Jiaotong Univ, Sch Elect & Informat Engn, Beijing 100044, Peoples R China
2.East China Jiaotong Univ, Sch Informat Engn, Nanchang 330013, Jiangxi, Peoples R China
3.Singapore Univ Technol & Design, Singapore 487372, Singapore
4.South Univ Sci & Technol China, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

Ni, Shanjin,Zhao, Junhui,Yang, Howard H.,et al. Small Cell Range Expansion with Interference Mitigation for Downlink Massive MIMO HetNets[C]. 345 E 47TH ST, NEW YORK, NY 10017 USA:IEEE,2018.