Experimental Demonstration of Femtocell Visible Light Communication System Employing Code Division Multiple Access

Abstract

This paper experimentally demonstrates a femtocell visible light communication system employing CDMA for multiple users, in which the intracells and intercells interference is alleviated, resulting in a significant aggregate capacity improvement.

Design and Demonstration of a TDD-Based Central-Coordinated Resource-Reserved Multiple Access (CRMA) Scheme for Bidirectional VLC Networking

“…CDMA combined with color-shiftkeying (CSK) modulation was used in [17] for multiple access transmission for RGB-LED VLC to enhance the system capacity and mitigate light interference. An experimental demonstration of a VLC system employing CDMA resulting in a significant aggregate capacity improvement was reported in [18]. In addition, many other studies used multiple access and multiple access optimization for VLC systems, such as a hybrid network with VLC for downlink transmission and radio frequency (RF) for uplink transmission [19] , [ 20].…”

A NOMA scheme for visible light communications with single carrier transmission and frequency-domain successive interference cancellation

“…Similar to other wireless communication technologies, multiple access techniques are crucial in VLC to support multiple services to multiple users concurrently. Orthogonal multiple access (OMA) techniques such as time domain multiple access (TDMA), orthogonal frequency domain multiple access (OFDMA) and interleaved frequency division multiple access (IFDMA) have been introduced into VLC [4][5][6][7]. However, they suffer from the tradeoff between throughput and fairness.…”

Experimental demonstration of IDMA‐OFDM for visible light communications

“…OFDMA has high spectrum efficiency and system capacity, which has been adopted for the fourth generation wireless communications and also widely investigated as a promising technique for coherent optical communications and passive optical network [10][11][12][13]. The multiple access interference (MAI) and inter-symbol interference limit the system capacity of CDMA [14], which can be easily removed for OFDMA.…”