DCO-OFDM Implementation for Visible Light Communication Systems

Single-Input Single-Output (SISO) DCO-OFDM code for Visible Light Communication (VLC) systems based on DC-biased OFDM methodology. The core implementation involves converting bipolar OFDM signals to unipolar signals by adding a DC bias (BDC) using the transformation x(t) = X₀(t) + BDC, followed by clipping operations. Key implementation challenges include managing clipping noise caused by Gaussian-distributed signal peaks and optimizing BDC selection to balance between linear modulation range and noise performance. Critical algorithmic considerations involve power management, signal distribution analysis, and clipping level calculations relative to subcarrier count.