Reduced resource competition based on mCAP and FD-OZCZ code for VLCP system

The advancement of smart cities and intelligent industries has accentuated the necessity for reliable indoor communication and precise indoor positioning. In response, this paper presents an innovative integrated system for indoor visible light communication and positioning, designed to facilitate robust communication and pinpoint accuracy in positioning for indoor applications. We incorporate multiband carrierless amplitude and phase (mCAP) modulation to mitigate interference between communication and positioning subcarriers. Unlike the conventional orthogonal frequency division multiplexing-based subcarrier modulation (OFDM-SCM), mCAP demonstrates reduced out-of-band interference and a diminished peak-to-average power ratio (PAPR). Moreover, we introduce the frequency domain optical zero correlation zone (FD-OZCZ) code, integrated within the mCAP signal to optimize the distribution of positioning subcarriers. Simulation outcomes substantiate that our proposed mCAP, augmented with FD-OZCZ, outperforms OFDM-SCM systems in delivering reliable communication and exceptional positioning accuracy.