Hybrid NOMA-Based ACO-FBMC/OQAM for Next-Generation Indoor Optical Wireless Communications Using LiFi Technology

Abstract

The light fidelity (LiFi) has been successfully used to achieve high data transfer rates, high security, great availability, and low interference. In this paper, we propose a LiFi system consisting of a combination of non-orthogonal multi-access (NOMA), asymmetrically-clipped optical (ACO) and filter bank multicarrier (FBMC) techniques combined with offset quadrature amplitude modulation (OQAM). The paper also applies a $\mu$-law companding approach for a high peak to average power ratio (PAPR) reduction of the FBMC/OQAM scheme. The combination of NOMA, ACO-FBMC/OQAM, and $\mu$-law companding allows a significant increase in throughput and a significant reduction in non-served users. An appropriate algorithm is developed considering two scenarios, maximize the throughput and minimize the number of blocked (non-served) users. The results show that the throughput of the system can be increased by $1.8$ compared to FBMC and OFDM. Furthermore, the proposed system reduces the number of blocked users below $10\%$, while the system can provide $30\%$ or $60\%$ in case only the FBMC or OFDM is used, respectively.

Integration of Hybrid Networks, AI, Ultra Massive-MIMO, THz Frequency, and FBMC Modulation Toward 6G Requirements: A Review

“…Additionally, the FBMC minimizes ICI using specially developed pulse shaping filters and is not susceptible to multipath fading without CP. As a result, FBMC offers higher spectral efficiency [73]. In contrast with previous multiple carrier approaches, high spectral efficiency for the wireless network is what the FBMC promises, low side-lobe radiation, a higher data rate, and flexible receiver signal processing [73], [74].…”

“…As a result, FBMC offers higher spectral efficiency [73]. In contrast with previous multiple carrier approaches, high spectral efficiency for the wireless network is what the FBMC promises, low side-lobe radiation, a higher data rate, and flexible receiver signal processing [73], [74]. It is also robust against multipath channel fading [75].…”