Unitary checkerboard precoded OFDM for low-PAPR optical wireless communications

Future 6G wireless networks will once again have to raise the performance in most technology domains by a factor of 10–100. Depending on application, future requirements include peak data rates 1 Tb/s per user, 0.1 ms latency, less than one out million outage, centimeter accurate positioning, near zero energy consumption at device, and operation different environments including factories, vehicles, more. Optical communications (OWCs) potential provide ultrahigh cost effective way, due vast freely available light spectrum, availability devices for transmitters receivers. 5G New Radio architecture permits integration stand-alone OWC nodes network layers. Current research investigates advanced physical layer designs OWC-compatible waveforms. In this context, paper, new precoded orthogonal frequency division multiplexing (OFDM) waveform is proposed that tailored OWCs’ specific needs. Its prime advantage compared OFDM ultralow peak-to-average power ratio, while preserving other benefits, such as high spectral efficiency, flexible subcarrier nulling, low computational complexity.