Non-Hermitian symmetry OFDM for indoor space division multiplexing visible light communications
- Resource Type
- Conference
- Authors
- Zhong, Wen-De; Chen, Chen; Wu, Dehao
- Source
- 2016 18th International Conference on Transparent Optical Networks (ICTON) Transparent Optical Networks (ICTON), 2016 18th International Conference on. :1-4 Jul, 2016
- Subject
- Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
Photonics and Electrooptics
OFDM
Integrated optics
Optical receivers
Visible light communication
LED lamps
High-speed optical techniques
Transceivers
visible light communication
space division multiplexing
non-Hermitian symmetry orthogonal frequency division multiplexing
communication coverage
- Language
- ISSN
- 2161-2064
We propose a non-Hermitian symmetry orthogonal frequency division multiplexing (NHS-OFDM) scheme for indoor space division multiplexing based visible light communication (SDM-VLC) systems. NHS-OFDM removes the constraint of Hermitian symmetry and generates light-emitting diode (LED) compatible real-valued signals by parallelly transmitting the real (Re) part and the imaginary (Im) part of a complex-valued OFDM signal via a pair of white LED lamps. Compared with conventional Hermitian symmetry based OFDM (HS-OFDM), NHS-OFDM has lower computational complexity and less power consumption, due to its 50% reduced transceiver complexity. The analytical results show that an indoor two-channel SDM-VLC system using the proposed NHS-OFDM achieves 15.9% reduction in the transmitted optical power and 27.9% improvement in the communication coverage for a target BER of 10 −3 than the system using conventional HS-OFDM.