Journal
IEEE TRANSACTIONS ON COMMUNICATIONS
Volume 68, Issue 6, Pages 3706-3719Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCOMM.2020.2979845
Keywords
Indexes; Modulation; Wireless communication; Adaptive optics; Ultrafast optics; Optical pulses; Light emitting diodes; PAM; frequency domain equalization; index modulation; optical wireless communication
Funding
- Indonesian Endowment Fund for Education (LPDP)
- Zodiac Inflight Innovations (TriaGnoSys GmbH)
- Engineering and Physical Sciences Research Council (EPSRC) [EP/R007101/1]
- Wolfson Foundation
- Royal Society
- EPSRC [EP/S016570/1]
- EPSRC [EP/S016570/1, EP/R007101/1] Funding Source: UKRI
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A novel modulation scheme for an indoor optical wireless communication (OWC) system referred to as generalized time slot index modulation (GTIM) is proposed for single-carrier frequency domain equalization (SC-FDE) systems. This scheme is further referred to as SC-GTIM. In SC-GTIM, information bits are flexibly encoded onto both the amplitudes and positions of pulses. A set partitioning algorithm is proposed to construct a codebook for the SC-GTIM system. In this paper, SC-GTIM will be compared with the conventional pulse amplitude modulation-based SC-FDE (SC-PAM) and time slot index modulation-based SC-FDE (SC-TIM). By considering a multipath optical wireless channel and the limited dynamic range of a light emitting diode (LED), a considerable bit error ratio (BER) gain can be achieved by SC-GTIM. It is concluded that SC-GTIM is a promising technique for low to medium spectral efficiency transmission and uplink schemes.
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