Channel Estimation and Physical Layer Security in Optical MIMO-OFDM based LED Index Modulation
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Date
2023
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IEEE
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Abstract
In this paper, we propose a new and low-complexity channel estimation algorithm for the generalized LED index modulation (GLIM), recently proposed for visible-light communication systems based on multi-input multi-output (MIMO) and orthogonal frequency-division multiplexing (OFDM). For this scheme, denoted by GLIM-OFDM, we investigate the bit-error rate (BER), the mean-square error (MSE) of channel estimation, as well as the Cramer-Rao bound on the latter. Furthermore, we present a novel physical layer security (PLS) technique for the GLIM-OFDM scheme using precoding at the transmitter assuming it has the channel state information (CSI) between the LEDs and a legitimate user, but no knowledge of the CSI corresponding to eavesdroppers. The efficiency of the proposed PLS technique is demonstrated through numerical results.
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22nd IEEE Statistical Signal Processing Workshop (SSP) -- JUL 02-05, 2023 -- VNU Univ Engn & Technol, Hanoi, VIETNAM
Keywords
Visible light communication(VLC), Orthogonal frequency division multiplexing(OFDM), Transmission, Generalized LED index modulation OFDM(GLIM-OFDM), Channel Estimation (CE), Transmission, Physical Layer Security (PLS)
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2023 Ieee Statistical Signal Processing Workshop, Ssp
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Start Page
641
End Page
645