Multiuser Visible Light Communication Systems Using OFDMA

Lian, Jie; Brandt-Pearce, Maïté

doi:10.1109/jlt.2020.3008290

Cited by 30 publications

(12 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 is removing the DC-level and the way of arranging the data. This arrangement results in asymmetric output samples from the IFFT block, as represented in (2). Derivation for (2), is found in [26].…”

Section: B Aco-ofdmmentioning

confidence: 99%

“…The demand for wireless communications are growing day by day and currently, most researchers are looking for a new spectrum for wireless communication systems instead of the radio frequency (RF) spectrum as it will be fully occupied by 2035 [1]. Therefore, Visible Light Communications (VLC) research attracts more attention over the last ten years [2], as the visible light spectrum ranges from (4x10 14 ) to (8 x10 14 ) Hz [3], that is ten times wider than the RF spectrum. In VLC, data is transmitted using non-coherent sources at the transmitter such as Light Emitting Diode (LED) due to its high efficiency, low-cost, and easy implementation for frontend devices [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Novel Unipolar Optical Modulation Techniques for Enhancing Visible Light Communication Systems Performance

et al. 2022

View full text Add to dashboard Cite

Visible Light Communications (VLC) are receiving increased attention in the wireless communications research community. VLC is secured, power efficient, and operates in the visible light range, thus RF communication bandwidth limitation is overcome. In this article, the authors enhance the data rate, system complexity, power efficiency, and spectrum efficiency in VLC systems. An innovative unipolar transceiver system is proposed, mathematically analyzed, and compared with other existing techniques and it demonstrates to have a very high data rate ratio (43.75%) with a good system bit energy to noise ratio (𝐸 𝑏 /𝑁 𝑂 ) compared to other existing techniques. Development for the traditional asymmetrically and symmetrically clipping optical (ASCO-OFDM) system is also proposed, which involves combining a modified receiver with the ASCO-OFDM system traditional transmitter. The proposed receiver reduces the system complexity by O (𝑁 log 2 𝑁) with better 𝐸 𝑏 /𝑁 𝑂 than the conventional ASCO-OFDM. Detailed analysis, simulation results, and comparison of the proposed systems with the existing systems are presented beside a brief assessment of existing techniques.

show abstract

Section: B Aco-ofdmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel Unipolar Optical Modulation Techniques for Enhancing Visible Light Communication Systems Performance

et al. 2022

View full text Add to dashboard Cite

show abstract

“…To accommodate multiple access in VLC systems, multiple techniques have been proposed in the literature, such as OFDM, Time-Division Multiple Access (TDMA), and Code Division Multiple Access (CDMA) [ 17 , 20 , 21 , 22 , 23 , 24 , 25 ]. The source allocation for CDMA and PD-NOMA is shown in Figure 2 .…”

Section: Introductionmentioning

confidence: 99%

Deep Learning-Based Next-Generation Waveform for Multiuser VLC Systems

Asif

Affan

Tarhuni

et al. 2022

Sensors

View full text Add to dashboard Cite

Due to the growing number of users, power, and spectral effectiveness, most communication systems are complex and difficult to implement on a large scale. Artificial Intelligence (AI) has played an outstanding role in the implementation of theoretical systems in the real world, with less complexity achieving better results. In this direction, we compare the Non-Orthogonal Multiple Access (NOMA) technique for a multiuser Visible Light Communication (VLC) system with Successive Interference Cancellation (SIC) for two types of detectors: (1) the deep learning-based system and (2) the traditional maximum likelihood (ML) decoder-based system. For multiplexing, we compare the variations of novel Orbital Angular Momentum (OAM) multiplexing and Orthogonal Frequency Division Multiplexing (OFDM) with Index Modulation (IM). In this article, we implement OFDM-IM and OAM-IM for four users for the Gaussian fading MIMO Line-of-Sight (LoS) and Non-Line-of-Sight (NLoS) VLC channels. The suggested systems’ bit error rate (BER) performances are compared in simulations for a wide range of Signal-to-Noise Ratios (SNRs), which shows that deep learning-based systems outperform the ML-based system for both users to ensure better decoding at the receiver end, especially at higher SNR values. The detection error is lower in a deep learning-based system at around 20% and around 30% for low SNR and high SNR values, respectively.

show abstract

“…Research on orthogonal frequency division multiplexing (OFDM) can enhance the utilization of the VLC frequency. In [12], orthogonal frequency division multiple access (OFDMA) was explored for VLC due to its high spectrum utilization efficiency and potentially high transmission data rate. A power line communication-VLC hybrid high data rate transmission approach with discrete wavelet transform (DWT)-based OFDM was designed and proposed for 5G communication systems in [13].…”

Section: Introductionmentioning

confidence: 99%