UFMC-Based Interference Management for Heterogeneous Small-Cell Networks

Liang Wu,Bingcheng Zhu,Zaichen Zhang,Hao Jiang,Jian Dang,Huaping Liu

doi:10.1109/access.2019.2941995

Abstract

In this paper, we apply the advanced waveform universal filtered multi-carrier (UFMC) to a heterogeneous small-cell network, where both the inner-cell interference and the inter-cell interference are considered. By employing UFMC, a dynamic spectrum allocation scheme and a precoding scheme are proposed to mitigate the interference. The proposed UFMC based interference management schemes are analyzed in detail, and the achievable data rate of the proposed scheme is derived. Simulation results show that the proposed UFMC based schemes can efficiently mitigate the interference, and reduce the effect of frequency offsets.

Highlights

Fifth generation (5G) wireless communication is gradually becoming commercial [1], [2]
Because the D2D user group is located in the first small cell, the D2D users can receive the signal from any other users of the first small cell during the uplink transmission, which will cause interference if the same spectrum is allocated to both the D2D group user and the regular user
It can be seen from Figure. 5 that the orthogonal frequency division multiplexing (OFDM) based dynamic spectrum allocation scheme is greatly affected by the frequency offset, and there is an error floor of the second user’s and the fifth user’s bit-error rate (BER)

Summary

INTRODUCTION

Fifth generation (5G) wireless communication is gradually becoming commercial [1], [2]. L. Wu et al.: UFMC-Based Interference Management for Heterogeneous Small-Cell Networks. Based on UFMC, interference management schemes are proposed for the heterogenous small-cell networks. Simulation results show that the proposed UFMC based schemes can efficiently mitigate the interference, and reduce the effect of frequency offsets. The received frequency-domain signal of the first BS corresponding to the subband of the k-th user in the first small cell is expressed as. Because the D2D user group is located in the first small cell, the D2D users can receive the signal from any other users of the first small cell during the uplink transmission, which will cause interference if the same spectrum is allocated to both the D2D group user and the regular user. The achievable data rate of the D2D user group and the users of the second small cell can be derived with the same principle

THE PROPOSED PRECODEING BASED INTERFERENCE CANCELLATION SCHEME

PERFORMANCE EVALUATION

CONCLUSION