Non-orthogonal multiple access (NOMA) is deemed to be a prospective technology of the next generation. However, in visible light communication (VLC), when advanced hybrid optical orthogonal frequency division multiplexing (O-OFDM), such as asymmetrically clipped O-OFDM (HACO-OFDM), combined with NOMA, error propagation induced, which degrades system performance. Therefore, novel reconstructed O...

Orthogonal frequency division multiplexing with index modulation (OFDM-IM), which transmits information bits via $M$ -ary constellation symbols and indices of the active subcarriers, is a promising OFDM-based multicarrier transmission...

Conventional optical orthogonal frequency division multiplexing (OFDM) schemes, such as adaptively biased OFDM (ABO-OFDM) and hybrid asymmetrically clipped (HACO-OFDM), are unable to tap all the resources of subcarriers only achieve relatively high power efficiency. In this paper, a adaptive bias (HABO-OFDM) scheme for visible light communication (VLC) is proposed improve spectral efficiency HA...

The increasing demand for bandwidth through modern applications and multimedia services has led to high-speed wireless communications. Optical communications (OWC) encourages solutions that provide a higher data rate due the large available. In this paper, performance enhancement approaches are studied simulated visible light communication (VLC) as case study. orthogonal frequency division mult...

In this paper, it is proposed to enhance coherent optical orthogonal frequency-division multiplexing (OFDM) system by using index modulation in terms of bit error rate (BER) and spectral efficiency for different levels the fiber nonlinearity. OFDM with (CO-OFDM-IM), information conveyed not only through activated subcarriers but also indices active subcarrier that are dynamically updated at tra...

This paper proposes a new hybrid orthogonal frequency division multiplexing (OFDM) form termed as DC-biased pulse amplitude modulated optical OFDM (DPO-OFDM) by combining the ideas of existing (DCO-OFDM) and discrete multitone (PAM-DMT). The analysis indicates that required DC-bias for DPO-OFDM-based light fidelity (LiFi) depends on dimming level components DPO-OFDM. bit error rate (BER) perfor...