Sushanth, KVSS and Jacob, S and Chockalingam, A (2019) Space-Time Indexed Multiple-LED Complex Modulation Schemes for VLC Systems. In: 88th IEEE Vehicular Technology Conference, VTC-Fall 2018, 27 - 30 August 2018, Chicago.
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Abstract
This paper proposes two index modulation schemes for multiple-input multiple-output (MIMO) visible light communication (VLC) systems, referred to as time index modulated DCM (TIM-DCM) and space-time index modulated DCM (STIM-DCM) schemes. The proposed schemes use dual-LED complex modulator (DCM) as a basic unit (termed as DCM block) to transmit complex modulation symbols. In TIM-DCM scheme, a time slot in given frame can be used or unused, and the pattern in which the slots are used for transmission also conveys information bits (referred to as slot index bits) besides the information bits conveyed through complex modulation symbols. In STIM-DCM scheme, in addition to the slot index bits and modulation bits, spatial index bits are conveyed by activating one among the available DCM blocks in every used time slot. Hence, the proposed schemes can achieve high rates. We study the bit error rate (BER) performance of the proposed schemes and compare with that of the state-of-art modulation schemes such as spatial modulation DCM (SM-DCM) scheme. Results show that the proposed schemes can achieve better BER performance. Also, results on the spatial distribution of best performing modulation scheme indicates that the proposed schemes are favorable for different receiver locations across the room.
Item Type: | Conference Paper |
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Publication: | IEEE Vehicular Technology Conference |
Publisher: | Institute of Electrical and Electronics Engineers Inc. |
Additional Information: | The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc. |
Keywords: | Bit error rate; Light emitting diodes; MIMO systems; Visible light communication, Bit error rate (BER) performance; Complex modulation; Index modulation; Modulation schemes; Receiver location; Spatial indexes; Spatial modulations; Visible light communications (VLC), Modulation |
Department/Centre: | Division of Electrical Sciences > Electrical Communication Engineering |
Date Deposited: | 08 Aug 2022 08:44 |
Last Modified: | 08 Aug 2022 08:44 |
URI: | https://eprints.iisc.ac.in/id/eprint/75476 |
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