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

[img] Text

Download (1MB)


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 CreatorsORCiD
Natarajan, Lakshmi Prasad
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
Publisher URL:
OA policy:
Related URLs:

Actions (login required)

View Item View Item
Statistics for RAIITH ePrint 8136 Statistics for this ePrint Item