IEEE Photonics Journal (Jan 2024)

LCD-Based Angle-of-Arrival Estimation of Multiple Light Sources: Paving the Road to Multiuser VLC

  • Andrej Harlakin,
  • Peter A. Hoeher

DOI
https://doi.org/10.1109/JPHOT.2024.3388928
Journal volume & issue
Vol. 16, no. 3
pp. 1 – 15

Abstract

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This paper extends previous work on liquid-crystal-display-based angle-of-arrival (AoA) estimation, initially performed for only a single light source (LS), by considering scenarios with multiple LSs. First, the system model is revisited to investigate parameters that influence detection of multiple LSs. Next, challenges such as separation of co-located LSs and ambiguities are investigated. It is identified that target separation gets increasingly challenging with decreasing distance between LSs, and AoA estimation developed for a single LS leads to ambiguities in scenarios with multiple LSs. These problems are solved by a novel angular separation algorithm and dedicated intensity measurements. Finally, two new experimental setups are introduced to investigate and model optical diffraction effects, and to verify theoretical derivations by measurement results.

Keywords