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Location-aware pilot assignment for massive MIMO systems in heterogeneous networks

Location-aware pilot assignment for massive MIMO systems in heterogeneous networks
Location-aware pilot assignment for massive MIMO systems in heterogeneous networks
We investigate the heterogeneous cellular network (HetNet) where the macrocell base stations (MBSs) are equipped with very large antenna arrays. Since such a combined massive multi-input multi-output (MIMO) and HetNet system operates in the co-channel time-division duplex mode, to mitigate the pilot contamination effect to channel estimation, the number of users that can be served simultaneously is limited by the available pilot resources in the conventional designs.We propose a pilot reuse scheme for massive MIMO–HetNet to increase the user capacity. Specifically, location-aware channel estimation is employed at the MBSs to mitigate the severe pilot contamination introduced by pilot reuse, and we propose a novel pilot assignment algorithm to reduce the interference in HetNets. Simulation results demonstrate that our proposed scheme can support more users and increase both the uplink and the downlink sum-rate capacity, in comparison to the conventional scheme, particularly when the antenna number at the MBSs is sufficiently large.
0018-9545
6815-6821
Zhao, Peiyao
7f47a3da-a60f-4f6e-bd33-a680a6104041
Wang, Zhaocheng
70339538-3970-4094-bcfc-1b5111dfd8b4
Qian, Chen
2b85263f-c5ae-413e-a0d3-4c3abd84ff61
Dai, Linglong
a3b9a8e1-777f-4196-a388-969444c7239d
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Zhao, Peiyao
7f47a3da-a60f-4f6e-bd33-a680a6104041
Wang, Zhaocheng
70339538-3970-4094-bcfc-1b5111dfd8b4
Qian, Chen
2b85263f-c5ae-413e-a0d3-4c3abd84ff61
Dai, Linglong
a3b9a8e1-777f-4196-a388-969444c7239d
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80

Zhao, Peiyao, Wang, Zhaocheng, Qian, Chen, Dai, Linglong and Chen, Sheng (2016) Location-aware pilot assignment for massive MIMO systems in heterogeneous networks. IEEE Transactions on Vehicular Technology, 65 (8), 6815-6821. (doi:10.1109/TVT.2015.2480965).

Record type: Article

Abstract

We investigate the heterogeneous cellular network (HetNet) where the macrocell base stations (MBSs) are equipped with very large antenna arrays. Since such a combined massive multi-input multi-output (MIMO) and HetNet system operates in the co-channel time-division duplex mode, to mitigate the pilot contamination effect to channel estimation, the number of users that can be served simultaneously is limited by the available pilot resources in the conventional designs.We propose a pilot reuse scheme for massive MIMO–HetNet to increase the user capacity. Specifically, location-aware channel estimation is employed at the MBSs to mitigate the severe pilot contamination introduced by pilot reuse, and we propose a novel pilot assignment algorithm to reduce the interference in HetNets. Simulation results demonstrate that our proposed scheme can support more users and increase both the uplink and the downlink sum-rate capacity, in comparison to the conventional scheme, particularly when the antenna number at the MBSs is sufficiently large.

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Accepted/In Press date: 11 September 2015
e-pub ahead of print date: 22 September 2015
Published date: 11 August 2016
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 399644
URI: http://eprints.soton.ac.uk/id/eprint/399644
ISSN: 0018-9545
PURE UUID: 00abe0e1-8ee0-4517-9d6b-b27d08caa2d4

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Date deposited: 23 Aug 2016 08:27
Last modified: 16 Dec 2019 19:45

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Contributors

Author: Peiyao Zhao
Author: Zhaocheng Wang
Author: Chen Qian
Author: Linglong Dai
Author: Sheng Chen

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