Abstract
In order to circumvent the throughput limitation imposed on visible light communication (VLC) systems by the limited LED bandwidth, optical orthogonal frequency division multiplexing (OFDM) with non-uniform bit-loading is studied in this paper. By using lower order modulation on subcarriers that suffer the most distortion, we show that it is possible to establish a high throughput and reliable OFDM based VLC link at a sampling rate of six times the available system bandwidth. The high signal peak-to-average-power-ratio (PAPR) that accompanies the OFDM signal is however reduced by adopting the pilot symbol phase rotation technique previously proposed by the authors. With this, over 4 dB reduction in the electrical PAPR is attainable. This combined approach thus make it possible to achieve high throughput without incurring the high PAPR penalties.
| Original language | English |
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| Pages | 1322-1326 |
| Number of pages | 5 |
| DOIs | |
| Publication status | Published - 14 Sep 2015 |
| Event | IEEE International Conference on Communication Workshop, ICCW 2015 - London, United Kingdom Duration: 8 Jun 2015 → 12 Jun 2015 |
Conference
| Conference | IEEE International Conference on Communication Workshop, ICCW 2015 |
|---|---|
| Country/Territory | United Kingdom |
| City | London |
| Period | 8/06/15 → 12/06/15 |
Keywords
- bandwidth
- frequency division multiplexing
- light
- light emitting diodes
- optical communication
- throughput
- visible light communication, High throughput
- optical orthogonal frequency division multiplexing (OFDM)
- peak to average power ratio
- phase rotation
- pilot symbols
- sampling rates
- system bandwidth
- visible light communications (VLC), Orthogonal frequency division multiplexing