NOMA for Multiple Access Channel and Broadcast Channel in Indoor VLC

Uday, T. and Kumar, Abhinav and Natarajan, L. (2021) NOMA for Multiple Access Channel and Broadcast Channel in Indoor VLC. IEEE Wireless Communications Letters, 10 (3). pp. 609-613. ISSN 2162-2337

Text
09268971.pdf
Download (1MB)

Abstract

Orthogonal frequency division multiplexing (OFDM) based non-orthogonal multiple access (NOMA) has increased complexity and reduced spectral efficiency in visible light communications (VLC) NOMA compared to radio-frequency NOMA due to non-negative real value constraint on transmit symbols. To address this issue, we propose a generalized non-OFDM based scheme for two scenarios of indoor VLC; i) Multiple access channel (MAC), ii) Broadcast channel (BC). We evaluate the performance of the proposed scheme for MAC using successive interference cancellation (SIC) based decoding, joint maximum likelihood (JML) decoding, and a combination of SIC and JML decoding. For BC, we evaluate the performance using SIC based decoding. It is observed that, for MAC, the proposed scheme with JML decoding performs better than the state-of-the-art orthogonal multiple access both in terms of bit error rate (BER) and computations. For BC, the proposed scheme is computationally efficient with trade-off on BER.

[error in script]

IITH Creators:

IITH Creators	ORCiD
Uday, T	UNSPECIFIED
Kumar, Abhinav	UNSPECIFIED
Natarajan, Lakshmi Prasad	http://orcid.org/0000-0003-1552-5240

Item Type:

Article

Uncontrolled Keywords:

Broadcast channel; multiple access channel; non-orthogonal multiple access; successive interference cancellation; Broadcast channels; Computationally efficient; Joint maximum likelihood; Multiple access channels; Radio frequencies; Spectral efficiencies; Successive interference cancellation(SIC); Visible light communications (VLC) Engineering main heading

Subjects:

Electrical Engineering
Electrical Engineering > Wireless Communication

Divisions:

Department of Electrical Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

06 Jul 2021 09:01

Last Modified:

06 Jul 2021 09:01

URI:

http://raiithold.iith.ac.in/id/eprint/8136