Low-Complexity Detection Scheme for P-Orthogonal Transmission Method

The signaling scheme that is possible to be readily utilized in visible light communication (VLC) systems is unipolar incoherent signaling; i.e., intensity modulation/direct detection, whereas the conventional radio frequency transceivers (e.g., carrierless amplitude and phase modulation) require modifications that reduce their classical efficiency. Therefore, research efforts has been focused on adapting radio frequency methods to VLC. To this end, P-orthogonal transmission (OT) scheme, which could reduce the direct current element of the two-dimensional signal by relying on multi-waveform method at the transmitter side, was proposed. However, this method increases the computational complexity of the classical joint detector. Thus, the focus of this paper is to minimize the decoding complexity of the classical joint detector utilized in P-OT by proposing a new successive maximum likelihood detector in conjunction with P-OT that is less computationally demanding than the optimal joint detector by 62.5%.