Optimal bit-and-power allocation algorithm for VLC-OFDM system

摘要

An optimal bit-and-power allocation (BPA) algorithm for visible light communication-orthogonal frequency-division multiplexing (VLC-OFDM) system is proposed and demonstrated. It is such notable that the signal noise in VLC-OFDM system is not addition white Gaussian noise and its power changes with the received signal power through experimental measurement. Thus the optimal Hughes–Hartog BPA algorithm based on variable noise power is presented. Compared with the traditional BPA algorithm, the experiment indicates that the proposed optimal BPA algorithm can achieve about 15.9% improvement of data rate for VLC-OFDM system.