Abstract
In this paper, a novel optical Orthogonal Frequency Division Multiplexing (OFDM) modulation approach is presented. This method uses the Optical Spatial Modulation (OSM) technique to obtain positive and real-valued signals which are required by an Optical Wireless Communication (OWC) system. In comparison to existing OFDM methods applied to the OSM system, the new scheme, Non-DC-biased OFDM (NDC-OFDM), has significant advantages. Compared to DC-biased Optical OFDM (DCO-OFDM), NDC-OFDM avoids DC-biasing and, thus, improves the power efficiency. Moreover, the spectral and power efficiency of the new approach are better than the well-known unipolar optical modulation scheme, Asymmetrically Clipped Optical OFDM (ACO-OFDM). The bit-error ratio (BER) performances of these three methods are compared. Compared to ACO-OFDM and DCO-OFDM, NDC-OFDM has an energy saving gain of at least 5 dB for the same spectral efficiency. The improvement comes at the expense of additional hardware at the transmitter and receiver. However, visible light communication (VLC) systems typically are equipped with multiple low-cost Light Emitting Diodes (LEDs) to fulfill minimum indoor lighting conditions.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.