An Adaptively Biased OFDM Based on Hartley Transform for Visible Light Communication Systems

An Analytical Approach for Efficient OFDM Modulator and Demodulator Communication Systems Based On Discrete Hartley Transform

The main drawback of OFDM is its high peak to average power ratio (PAPR). High PAPR of OFDM makes it unusable in non-linear systems. So the clipping signals scheme is one useful and simple method to reduce the PAR. In the widely used OFDM (Orthogonal Frequency Division Multiplexing) systems, the FFT and IFFT pair are used to modulate and demodulate the data constellation on the subcarriers. Thi...

An adaptive scaling and biasing scheme for OFDM-based visible light communication systems.

Orthogonal frequency-division multiplexing (OFDM) has been widely used in visible light communication systems to achieve high-rate data transmission. Due to the nonlinear transfer characteristics of light emitting diodes (LEDs) and owing the high peak-to-average-power ratio of OFDM signals, the transmitted signal has to be scaled and biased before modulating the LEDs. In this contribution, an a...

An overview of visible light communication systems

Visible Light Communication (VLC) has gained great interest in the last decade due to the rapid developments in Light Emitting Diodes (LEDs) fabrication. Efficiency, durability and long life span of LEDs make them a promising residential lighting equipment as well as an alternative cheap and fast data transfer equipment. Appliance of visual light in data communication by means of LEDs has been ...

Indoor Localization Based on Visible Light Communication

PAPR Reduction Using Pre - Coder Based Discrete Hartley Transform in Optical OFDM Systems

In many wireless network applications Optical Orthogonal Frequency Divison Multiplexing (O-OFDM) plays an important role. It is a promising modulation technique for handling rapidly growing internet traffic. But higher peak to average power ratio (PAPR) is a major drawback in O-OFDM systems, which in results increases the complexity of digital to analog converters (DAC) and analog to digital co...