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Interference Mitigation for Indoor Optical Attocell Networks using Angle Diversity Receiver

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Original languageEnglish
JournalJournal of Lightwave Technology
Volume36
Issue number18
Early online date18 Jun 2018
DOIs
Publication statusPublished - 15 Sep 2018

Abstract

In this paper, interference mitigation techniques based on angle diversity receivers (ADRs) are studied for optical attocell networks. An ADR consists of multiple photodiodes (PDs), and thus requires appropriate signal combining schemes in order to mitigate inter-cell interference (ICI) in optical attocell networks. Therefore, four signal combining schemes namely select best combining (SBC), equal gain combining (EGC), maximum ratio combining (MRC) and optimum combining (OPC) are investigated. In order to further mitigate the ICI, a novel doublesource cell configuration with two transmission modes is also proposed. Results show that the systems with ADRs significantly outperform the systems with single-PD receivers in terms of signal-to-interference-plus-noise-ratio (SINR) performance. It is also shown that double-source cell configurations provide over 20 dB SINR improvement over conventional single-source cell configurations. Two transmission modes are proposed for double source cell configurations, and criteria for selecting the modes in order to further enhance the system performance in different deployments is also proposed. Furthermore, an analytical framework proposed to analyse the performance of optical attocell networks with ADRs, where different propagation scenarios such as line-of-sight (LOS) and non-line-of-sight (NLOS) are considered. The accuracy of the proposed analytical model is validated by Monte-Carlo simulations.

    Research areas

  • angle diversity receiver, Diversity reception, double-source cell configuration, Integrated optics, Interference, optical attocell network, Optical fiber networks, Optical receivers, Optical transmitters, signal combining scheme, theoretical analysis, visible light communication

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