Academic Journal
The Novel PAPR Reduction Schemes for O‐OFDM‐Based Visible Light Communications
| Title: | The Novel PAPR Reduction Schemes for O‐OFDM‐Based Visible Light Communications |
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| Authors: | Zhang, Tian |
| Source: | MODID-6d55e02e354:IntechOpen |
| Publisher Information: | IntechOpen |
| Publication Year: | 2017 |
| Subject Terms: | Technology & Engineering / Optics, bisacsh:TEC030000 |
| Description: | In this chapter, we propose two novel peak-to-average power ratio (PAPR) reduction schemes for the asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) scheme used in the visible light communications (VLC) system. In the first scheme, we implement the Toeplitz matrix based Gaussian blur method to reduce the high PAPR of ACO-OFDM at the transmitter and use the orthogonal matching pursuit algorithm to recover the original ACO-OFDM frame at the receiver. Simulation results show that for the 256-subcarrier ACO-OFDM system a ~6 dB improvement in PAPR is achieved compared with the original ACO-OFDM in terms of the complementary cumulative distribution function (CCDF), while maintaining a competitive bit-error rate performance compared with the ideal ACO-OFDM lower bound. In the second scheme, we propose an improved hybrid optical orthogonal frequency division multiplexing (O-OFDM) and pulse-width modulation (PWM) scheme to reduce the PAPR for ACO-OFDM. The bipolar O-OFDM signal without negative clipping is converted into a PWM format where the leading and trailing edges carry the frame synchronization and modulated information, respectively. The simulation and experimental results demonstrate that the proposed OFDM-PWM scheme offers a significant PAPR reduction compared to the ACO-OFDM with an improved bit error rate. |
| Document Type: | article in journal/newspaper |
| File Description: | application/pdf |
| Language: | English |
| ISBN: | 978-953-51-3407-7 953-51-3407-8 |
| DOI: | 10.5772/intechopen.68763 |
| Availability: | https://openresearchlibrary.org/viewer/9a8c5c9d-5bfb-4c63-a37a-9d910d8542a3 https://openresearchlibrary.org/ext/api/media/9a8c5c9d-5bfb-4c63-a37a-9d910d8542a3/assets/external_content.pdf https://doi.org/10.5772/intechopen.68763 |
| Rights: | https://creativecommons.org/licenses/by/4.0/legalcode |
| Accession Number: | edsbas.684019A4 |
| Database: | BASE |
| ISBN: | 9789535134077 9535134078 |
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| DOI: | 10.5772/intechopen.68763 |