Imperial College London
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ProfessorBrunoClerckx

Faculty of Engineering, Department of Electrical and Electronic Engineering

Professor of Wireless Communications and Signal Processing
 
 
 
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Contact

 

+44 (0)20 7594 6234b.clerckx Website

 
 
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Location

 

816Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Cui:2016:10.1109/TWC.2016.2603475,
author = {Cui, Y and Wu, Y and Jiang, D and Clerckx, B},
doi = {10.1109/TWC.2016.2603475},
journal = {IEEE Transactions on Wireless Communications},
pages = {7484--7500},
title = {User-centric interference nulling in downlinkmulti-antenna heterogeneous networks},
url = {http://dx.doi.org/10.1109/TWC.2016.2603475},
volume = {15},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In heterogeneous networks (HetNets), strong interference due to spectrum reuse affects each user's signal-to-interference ratio (SIR), and hence is one limiting factor of network performance. In this paper, we propose a user-centric interference nulling (IN) scheme in a downlink large-scale HetNet to improve coverage/outage probability by improving each user's SIR. This IN scheme utilizes at most maximum IN degree of freedom (DoF) at each macro-base station to avoid interference to uniformly selected macro (pico) users with signal-to-individual-interference ratio below a macro (pico) IN threshold, where the maximum IN DoF and the two IN thresholds are three design parameters. Using tools from stochastic geometry, we first obtain a tractable expression of the coverage (equivalently outage) probability. Then, we obtain the asymptotic expressions of the coverage/outage probability in the low and high SIR threshold regimes. The analytical results indicate that the maximum IN DoF can affect the order gain of the outage probability in the low SIR threshold regime, but cannot affect the order gain of the coverage probability in the high SIR threshold regime. Moreover, we characterize the optimal maximum IN DoF, which optimizes the asymptotic coverage/outage probability. Finally, numerical results show that the proposed scheme can achieve good gains in coverage/outage probability over some baseline schemes.
AU  - Cui,Y
AU  - Wu,Y
AU  - Jiang,D
AU  - Clerckx,B
DO  - 10.1109/TWC.2016.2603475
EP  - 7500
PY  - 2016///
SN  - 1558-2248
SP  - 7484
TI  - User-centric interference nulling in downlinkmulti-antenna heterogeneous networks
T2  - IEEE Transactions on Wireless Communications
UR  - http://dx.doi.org/10.1109/TWC.2016.2603475
UR  - http://hdl.handle.net/10044/1/39498
VL  - 15
ER  -
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