Malte Hinrichs, Jonas Hilt, Volker Jungnickel, Sang-Kyu Lim, Il Soon Jang, Jin-Doo Jeong, Mohammad Noshad, “Pulsed Modulation PHY for Power Efficient Optical Wireless Communication”, Proc. 2019 IEEE International Conference on Communications (ICC), 20-24 May 2019, Shanghai, China
Abstract: Most literature on the physical layer (PHY) for optical wireless communication (OWC) considers the down-link from lighting infrastructure to mobile devices, and focuses on achieving high data rates by combining large bandwidth and high spectral efficiency. However, some applications, such as the corresponding up-link, device-to-device (D2D) communication, and Internet of Things (IoT), rely on energy-efficient transmission due to limited battery power. According to Shannon’s theorem, this can be achieved through using a large bandwidth with powerefficient modulation. The IEEE P802.15.13 task group recently defined the pulsed modulation (PM) PHY with these objectives in mind. The key is to enable robust synchronization and header detection by means of binary modulation. Block-based transmission with a cyclic prefix (CP) and frequency domain equalization (FDE) are used to enable a large bandwidth. In this paper, we present a thorough performance evaluation of the PM PHY. It is demonstrated that, by using an advanced synchronization scheme and FDE, packets can reliably be transmitted at clock rates up to 200 MHz over line-of-sight (LOS) and strong multi-path OWC channels considered typical for industrial wireless scenarios.