Nonlinear compensation for indoor visible light communication systems with carrierless amplitude and phase modulation

Abstract

Although there are enormous available bandwidths for license-free visible light communication (VLC), a relatively narrow modulation bandwidth of LED is still an obstacle for further application. The carrierless amplitude and phase (CAP) modulation is a high spectral efficiency modulation technology which has begun to draw more attention in recent years. However, to meet the illumination of indoor VLC, the nonlinear interference is quite serious because of multipath fading channels. Thus, the spectrum efficiency of VLC with CAP modulation is greatly limited by these nonlinear effects. In this paper, the nonlinear distortion of indoor VLC systems, which was introduced by the nonlinearity of analog device and multipath fading channel, has been analyzed. Therefore, the problem we are trying to solve is to study an adaptive digital equalizer at CAP modulation which can efficiently mitigate nonlinearity of indoor VLC. The simulation result shows that the adaptive digital decision-feedback equalizer is an effective solution that can mitigate inter-symbol interference and improve the receiver performance efficiently.

Design of Healthcare Lighting in Medical Centers Based on Power Carrier Communication

“…Jiang et al (2020) believe that power line carrier communication technology is widely used in lighting system control. Power line carrier communication is developing rapidly in Europe (Germany, Sweden, Finland, and other countries) (Ming et al, 2019).…”

Demonstration of 108 Gb/s Duo-Binary PAM-8 Transmission and the Probabilistic Modeling of DB-PAM-M BER

“…Due to the simplicity of implementation and low-cost, intensity-modulation and direct-detection (IM/DD)-based architectures are preferred to meet the demand of short-reach applications. Several advanced modulation formats such as pulse amplitude modulation (PAM) [4]- [6], discrete multitone (DMT) [4], [7]- [9], and carrierless amplitude and phase modulation (CAP) [10], [11], have been studied in the past using the IM/DD paradigm. Among them, PAM has garnered the most attention due to its ease of implementation and lower power consumption compared to DMT and CAP formats [5], [12]- [15].…”