ISI Modeling and BER Performance for Rotating Light-Trail Image Sensor Communication
For researchers in optical wireless communication, this work provides a tractable analytical BER framework for a specific rotating light-trail ISC system, but the approach is incremental and domain-specific.
The paper develops an analytical model for image sensor communication with rotating LED light trails, deriving a closed-form bit-error rate (BER) that accounts for adjacent-only inter-symbol interference. The model is validated against Monte Carlo simulations and experiments, and used to select control angles maximizing throughput under BER constraints.
Image sensor communication (ISC) employing a propeller-LED transmitter encodes data along rotating light trails. We present an analytical framework that (i) constructs a single-LED, single-blink light trail model that maps optical power to pixel values, and (ii) integrates a probabilistic noise model to derive a closed-form bit-error rate (BER) using the $Q$-function. Trimodal pixel-value histograms motivate an adjacent-only inter-symbol interference (ISI) model in which the decision at segment $j$ depends on adjacent segments. Applying a hardest-pair midpoint threshold yields per-segment BER and a general BER after marginalization. We further provide practical sufficiency conditions under which adjacent-only ISI is adequate, and validate its tightness against Monte Carlo simulations and experimental results. Using the analytical BER, we select the control angle that maximizes throughput while satisfying a target BER reliability constraint.