English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

OFDM Visible light communication (VLC) systems can achieve both illumination and data transmission simultaneously via light emitting diodes (LEDs). Orthogonal frequency-division multiplexing (OFDM) has been considered as a promising multi-carrier modulation technique for VLC due to its ability to boost data rates and efficiently combat inter-symbol-interference (ISI). However, the peak-to-average power ratio (PAPR) is the main problem of the OFDM-based VLC system. In this paper, a combined discrete Hartley transform (DHT) precoding and companding transform scheme is proposed to reduce the PAPR of OFDM-based VLC systems. The performance of the proposed PAPR reduction scheme is studied via simulation. Simulation results show that the proposed scheme may obtain significant PAPR reduction compared to the previously proposed DHT spread (DHTS) and conventional companding transform (CT) in terms of PAPR reduction capability. The bit error rate (BER) performance of the OFDM-based VLC system with combined DHT precoding and companding is also evaluated over an indoor dispersive VLC channel model. The simulation shows that the BER of the proposed scheme outperforms that of the companding scheme used alone.

PAPR Reduction of OFDM Signal for Visible Light Communication by Using Hartley Transform and Companding Techniques