1. CISCO: Cisco annual internet report (2018-2023) white paper. tech. rep. (2020)
2. Lin, B., Fang, X., Tang, X., Lin, C., Li, Y., Zhang, S., Wu, Y., Li, H.: Efficient frequency-domain channel equalization methods for dual-polarization orthogonal frequency-division multiplexing/offset quadrature amplitude modulation-passive optical network. Opt. Eng. 55, 1–7 (2016)
3. Pandey, G., Goel, A.: Performance analysis of long reach colorless wavelength division multiplexed-orthogonal frequency division multiplexing-passive optical network with broadcast capability. Opt. Eng. 55, 1–8 (2016)
4. Kakati, D., Minz, M., Sonkar, R.: Performance analysis of grating-assisted passive mode-division multiplexing device using silicon photonics for high-speed RoF/RoFSO communication. Opt. Eng. 60(1), 16–206 (2021)
5. Wang, Z., Xu, Y., Wang, Y., Wang, Y., Chi, N.: Demonstration of 2$$\times$$ONU 80 Gbps direct detection colorless polarization division multiplexing frequency division multiplexing passive optical network uplink transmission. Opt. Eng. 55, 1–5 (2016)