Abstract
The authors investigate space frequency block code (SFBC) with frequency-switched transmit diversity (FSTD) in indoor visible light communications (VLCs) in order to mitigate the co-channel interference (CCI) through a cooperative transmission and thereby improve system reliability. In addition, the authors explore the influence of parameters, the semi-angle at half power and the position of the light emitting diodes (LEDs), on the bit error rate (BER) performance. Although VLC is a promising technology for indoor wireless communications, it is necessary to cope with the CCI that occurs when the coverage areas of multiple LEDs overlap and the LEDs are sending different signals. The desired signal experiences serious interference from other LEDs to the point that it is impossible to recover the signal without coding. They investigate SFBC-FSTD in a multiple-input single-output-VLC system composed of four LEDs and one photodiode. It is effective in this scenario because the data rate is not affected by the code rate. Through computer simulations, SFBC-FSTD exhibits great improvement in the BER performance, requiring a lower signal-to-noise ratio than SFBC and single-input single-output. Furthermore, SFBC-FSTD is more power efficient.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
