Visible light communication (VLC) is considered
one of the newest wireless communication technologies that
provides transmitted signals with high data rate. Orthogonal
frequency division multiplexing (OFDM) is used extensively in
VLC due to its ability to support high speed transmission and it
gets ride of the inter-symbol interference [1]. OFDM
enhancement with wavelet based on discrete wavelet transform
(DWT) has achieved remarkable performance compared to
OFDM due to interesting wavelet characteristics. OFDM suffers
from the issue of peak to average power ratio (PAPR) which
reduces the system efficiency especially in VLC system due to the
nonlinearity of light emitting diode (LED) which distorts the
signal. Wavelet proved an improvement in PAPR reduction of
the radiated signal. In our study, an exponential companding
PAPR reduction technique is applied on a wavelet-OFDM which
satisfies better enhancement in PAPR reduction of the
transmitted signal. |
