TY - JOUR A2 - Dat, Pham Tien AU - Muneer, P. AU - Thafasal Ijyas, V. P. AU - Abbas, Mohamed AU - Loukil, Hassen AU - Algahtani, Ali AU - Kessentini, Amir AU - Mohammed, Abdul Wase PY - 2020 DA - 2020/07/09 TI - A Novel Non-DC Biased Intensity Modulated Indoor MIMO-VLC System Using Walsh Precoder SP - 1437049 VL - 2020 AB - In this paper, we propose an indoor visible light communication (VLC) system which makes use of Walsh precoding and multiple light-emitting diodes (LEDs) at the transmitter for multiplexing the data. The proposed VLC system is based on intensity modulation and uses the notion of spatial modulation for communicating the positive and negative values of the synthesized transmit signal using signal processing technique at the transmitter. We also illustrate the flexibility, ability, and easiness of the system to configure well in a multiuser environment. We have also developed a near-maximum likelihood (ML) detection technique for efficiently decoding the data bits at the receiver. The proposed near-ML reduces the search space involved in ML technique by using the initial ZF solution. The results of the simulation studies illustrate that the proposed technique offers a higher data rate and good bit error rate (BER) performance in indoor VLC environments. SN - 1530-8669 UR - https://doi.org/10.1155/2020/1437049 DO - 10.1155/2020/1437049 JF - Wireless Communications and Mobile Computing PB - Hindawi KW - ER -