ABSTRACT Visible light communication (VLC) is a promising solution for future wireless communication systems due to its high data rate, wide bandwidth, and enhanced security features. However, challenges such as high peak‐to‐average power ratio (PAPR) and out‐of‐band (OOB) spectral leakage limit its performance. In this study, we propose the integration of discrete prolate spheroidal sequences (DPSS) with direct current optical generalised frequency division multiplexing (DCO‐GFDM) to enhance the performance of indoor VLC systems. A comparative analysis between traditional DCO‐OFDM and the proposed DCO‐GFDM scheme is conducted under both line‐of‐sight (LOS) and non‐line‐of‐sight (NLOS) channel conditions. Simulation results show that the proposed method achieves approximately 2.5 dB reduction in PAPR and 45% reduction in OOB leakage compared to conventional DCO‐OFDM, while maintaining a similar bit error rate (BER) performance. Moreover, the DCO‐GFDM scheme demonstrates higher spectral efficiency without significant degradation in BER, achieving a BER below 10 −3 at a signal‐to‐noise ratio (SNR) of 20 dB in both LOS and NLOS scenarios. These improvements underline the effectiveness of the DPSS‐based approach in enhancing the reliability and spectral efficiency of indoor VLC systems.
Emami et al. (Wed,) studied this question.