A Gigabit/s Indoor Wireless Transmission Using MIMO-OFDM Visible-Light Communications

Azhar, Ahmad Helmi; Tran, Thai; O’Brien, Dominic

doi:10.1109/lpt.2012.2231857

Cited by 446 publications

(195 citation statements)

References 17 publications

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“…Hence, the research of advanced MIMO transmission techniques has also been intensified in the optical domain [103]- [115]. In particular, the authors of [104] and [105] investigated the free-space optical MIMO systems equipped with multiple lasers and PDs, while the treatises [106]- [110] are based on VLC systems. Explicitly, Zeng et al [106] studied and compared the non-imaging and imaging MIMO techniques 5 , which provided deep insights concerning optical MIMO systems.…”

Section: Multiuser Signal Processingmentioning

confidence: 99%

“…Furthermore, Azhar et al [109] were the first authors, who demonstrated a MIMO-OFDM-based imaging receiver, which achieved a transmission rate of 220 Mbits/s. Then they improved the attainable system performance by optimizing the pre-equalization weight of each carrier, where a transmission rate of 1 Gb/s was achieved experimentally by a MIMO system, as reported in [110].…”

Section: Multiuser Signal Processingmentioning

confidence: 99%

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Optimization of Visible-Light Optical Wireless Systems: Network-Centric Versus User-Centric Designs

Zhang

Hanzo

2018

IEEE Commun. Surv. Tutorials

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Abstract-In order to counteract the explosive escalation of wireless tele-traffic, the communication spectrum has been gradually expanded from the conventional radio frequency (RF) band to the optical wireless (OW) domain. By integrating the classic RF band relying on diverse radio techniques and optical bands, the next-generation heterogeneous networks (HetNets) are expected to offer a potential solution for supporting the ever-increasing wireless tele-traffic. Owing to its abundant unlicensed spectral resources, visible light communications (VLC) combined with advanced illumination constitute a competent candidate for complementing the existing RF networks. Although the advantages of VLC are multi-fold, some challenges arise when incorporating VLC into the classic RF HetNet environments, which may require new system architectures. The user-centric (UC) design principle for VLC environments constitutes a novel and competitive design paradigm for the super dense multi-tier cell combinations of HetNets. The UC concept may be expected to become one of the disruptive techniques to be used in the forthcoming fifthgeneration era. This paper provides a comprehensive survey of visible-light-aided OW systems with special emphasis on the design and optimization of VLC networks, where the radically new UC design philosophy is reviewed. Finally, design guidelines are provided for VLC systems.

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Section: Multiuser Signal Processingmentioning

confidence: 99%

Section: Multiuser Signal Processingmentioning

confidence: 99%

Optimization of Visible-Light Optical Wireless Systems: Network-Centric Versus User-Centric Designs

Zhang

Hanzo

2018

IEEE Commun. Surv. Tutorials

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“…The beginning of the transmission block has the high fidelity modulated sub carrier. In [5] 2013 Multiple Input and Multiple Output (MIMO) are determined in the matrix format. It has low frequency, with relative average speed of the electrical amplitude; the frequency of the Signal Noise Ratio (SNR) is limited across the frequency spectrum.…”

Section: IImentioning

confidence: 99%

Visible Light Communication Using Li-Fi

Shankari¹

2018

IJRASET

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Abstract:The main problem during the data transfer is security. In early days various data transferring techniques has been used like wired data transfer, wireless data transfer, satellite based data transfer etc. But each techniques has some drawbacks like security, data transfer rate, data loss etc. The most important problem is the security and data breaching. In order to overcome these problems, Light Fidelity (Li-Fi) is introduced in this proposed work. It is a new technique to transfer secured data using lights. For data transfer, LED (Light Emitting Diode) is used, both in transmitting as well as in the receiving end. Light from the device that can display and communicates to the color sensor on the consumer product, it then converts the light into digital information. The speed is sufficient for the humans to visibly read a file. This portable device is more powerful and can be widely used for communication

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“…The orthogonal frequency division multiplexing (OFDM) scheme widely and successfully used in RF systems [8,9] has also been adopted in VLC systems to combat multipath distortion and boost the data rate without any bandwidth or power expansion [10][11][12][13][14]. In OFDM-VLC systems, the received signal is usually distorted by the wireless channel.…”

Section: Introductionmentioning

confidence: 99%

Efficient frequency‐domain channel equalisation methods for OFDM visible light communications

et al. 2017

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Abstract:We present efficient frequency domain channel estimation methods based on the intra-symbol frequency-domain averaging (ISFA), minimum mean squared error (MMSE) and weighted inter-frame averaging (WIFA) schemes for the orthogonal frequency division multiplexing (OFDM) visible light communications (VLC) system. OFDM-VLC with quadrature phase shift keying, 16-and 64-quadrature amplitude modulation mapping is experimentally demonstrated. Compared with the conventional least square channel estimation method, ISFA, MMSE and WIFA offer improved performance with MMSE offering the best performance in term of the error vector magnitude but at the cost of high complexity. We show that the WIFA can improve the estimation accuracy of time-varying VLC optical channel.

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A Gigabit/s Indoor Wireless Transmission Using MIMO-OFDM Visible-Light Communications

Cited by 446 publications

References 17 publications

Optimization of Visible-Light Optical Wireless Systems: Network-Centric Versus User-Centric Designs

Optimization of Visible-Light Optical Wireless Systems: Network-Centric Versus User-Centric Designs

Visible Light Communication Using Li-Fi

Efficient frequency‐domain channel equalisation methods for OFDM visible light communications

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