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Multi-user MIMO-OFDM for indoor visible light communication systems

Multi-user MIMO-OFDM for indoor visible light communication systems
Multi-user MIMO-OFDM for indoor visible light communication systems
In this paper, we investigate an indoor multiuser visible light communication system employing multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM). For each subcarrier in OFDM, the corresponding precoding matrix is calculated in the frequency domain to eliminate multi-user interference. The distances of the multiple transmitter-receiver links are different, which results in various temporal delays and phase differences in the frequency domain. Phase information is firstly considered, whereby complex instead of real channel matrices are used for precoding, which reduces the channel correlation and achieves better performance. Moreover, two DC bias and scaling factor calculation schemes are proposed, and their performances are compared with zero forcing and minimum mean-squared error (MMSE) precoding techniques.
1170-1174
Wang, Qi
ddfc62a2-708c-43b1-8eed-d68d4e87d96a
Wang, Zhaocheng
a6bc4037-d26d-4ddd-9ce5-f018980115b6
Qian, Chen
2b85263f-c5ae-413e-a0d3-4c3abd84ff61
Quan, Jinguo
9a0f0783-4643-4e9d-9cb9-a148bbef677d
Dai, Linglong
a3b9a8e1-777f-4196-a388-969444c7239d
Wang, Qi
ddfc62a2-708c-43b1-8eed-d68d4e87d96a
Wang, Zhaocheng
a6bc4037-d26d-4ddd-9ce5-f018980115b6
Qian, Chen
2b85263f-c5ae-413e-a0d3-4c3abd84ff61
Quan, Jinguo
9a0f0783-4643-4e9d-9cb9-a148bbef677d
Dai, Linglong
a3b9a8e1-777f-4196-a388-969444c7239d

Wang, Qi, Wang, Zhaocheng, Qian, Chen, Quan, Jinguo and Dai, Linglong (2015) Multi-user MIMO-OFDM for indoor visible light communication systems. IEEE Global Conference on Signal and Information Processing (GlobalSIP), United States. 14 - 16 Dec 2015. pp. 1170-1174 . (doi:10.1109/GlobalSIP.2015.7418382).

Record type: Conference or Workshop Item (Paper)

Abstract

In this paper, we investigate an indoor multiuser visible light communication system employing multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM). For each subcarrier in OFDM, the corresponding precoding matrix is calculated in the frequency domain to eliminate multi-user interference. The distances of the multiple transmitter-receiver links are different, which results in various temporal delays and phase differences in the frequency domain. Phase information is firstly considered, whereby complex instead of real channel matrices are used for precoding, which reduces the channel correlation and achieves better performance. Moreover, two DC bias and scaling factor calculation schemes are proposed, and their performances are compared with zero forcing and minimum mean-squared error (MMSE) precoding techniques.

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More information

e-pub ahead of print date: December 2015
Venue - Dates: IEEE Global Conference on Signal and Information Processing (GlobalSIP), United States, 2015-12-14 - 2015-12-16
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 400618
URI: https://eprints.soton.ac.uk/id/eprint/400618
PURE UUID: a1c369a4-cfc3-44a1-91c2-d9f12725402d

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Date deposited: 20 Sep 2016 10:40
Last modified: 17 Jul 2017 18:11

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