scholarly journals Spectral Efficient Asymmetrically Clipped Hybrid FBMC for Visible Light Communication

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Sanjeev Kumar ◽  
Preeti Singh
Keyword(s):  
Visible Light ◽  
Amplitude Modulation ◽  
Spectral Efficiency ◽  
Filter Bank ◽  
Direct Detection ◽  
Average Power ◽  
Pulse Amplitude ◽  
Visible Light Communication ◽  
Discrete Multitone ◽  
Filter Bank Multicarrier

Filter bank multicarrier (FBMC) modulation has shown sufficient potential for wireless communication. A hybrid optical FBMC technique is proposed to improve the spectral efficiency of a visible light communication (VLC) system. In this technique, a hybrid asymmetrically clipped optical offset quadrature amplitude modulation FBMC (HACO-OQAM-FBMC) modulation technique is used. Asymmetrically clipped optical FBMC (ACO-FBMC) is used for odd subcarriers, and pulse amplitude modulation-discrete multitone (PAM-DMT) is used for the even subcarriers. The proposed hybrid scheme uses an intensity modulation/direct detection (IM/DD) channel. It is shown that there is no interference on odd subcarriers using the proposed method and receiver demodulation is similar to that of ACO-FBMC receiver. However, clipping noise of ACO-FBMC falls on PAM-DMT subcarriers, which can be cancelled at receiver processing after estimation. The analytical performance of the proposed technique is compared using parameters, namely, bit error rate (BER), spectral efficiency, computational complexity, and peak to average power ratio (PAPR). It is found that HACO-OQAM-FBMC is more spectral efficient than ACO-FBMC and other OFDM-based techniques.

Peak to average power ratio (PAPR) reduction in filter bank multicarrier (FBMC) and orthogonal frequency division multicarrier (OFDM) based visible light communication systems

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Haitham F. Abdalla ◽  
Emad S. Hassan ◽  
Moawad I. Dessouky
Keyword(s):  
Visible Light ◽  
Communication Systems ◽  
Filter Bank ◽  
Average Power ◽  
Visible Light Communication ◽  
Power Ratio ◽  
Frequency Division ◽  
Filter Bank Multicarrier ◽  
Optical Ofdm ◽  
Ber Performance

AbstractFilter bank multicarrier (FBMC) is a new waveform candidate in the visible light communication system (VLC). FBMC is a particular sort of multi-carrier modulation that can be viewed as an option in contrast to orthogonal frequency division multicarrier (OFDM) with CP (cyclic prefix). The point is to defeat some innate disadvantages of the normally utilized optical OFDM schemes. The principles of key transceiver should be intended to suit the necessities of the channel of IM/DD. Peak to average power ratio (PAPR) and bit error rate (BER) performance of FBMC based VLC are discussed and compared with scheme of optical OFDM. FBMC based VLC system with clipping technique has the lowest PAPR and good BER performance compared to conventional system in this paper. This paper recommends that FBMC based VLC has an incredible potential for optical wireless communication systems with high-speed. Matlab program simulations confirm the analysis. The results may shed light into potential research line on FBMC based VLC systems.

scholarly journals Experimental Demonstration of Special-Shaped 32-Quadrature Amplitude Modulation Constellations for Visible Light Communications

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Xinyue Guo ◽  
Shuangshuang Li ◽  
Yang Guo
Keyword(s):  
Visible Light ◽  
Amplitude Modulation ◽  
High Speed ◽  
Light Emitting Diode ◽  
Rapid Development ◽  
Average Power ◽  
Visible Light Communication ◽  
Quadrature Amplitude Modulation ◽  
Visible Light Communications ◽  
Transmission Distance

With the rapid development of light-emitting diode, visible light communication (VLC) has become a candidate technology for the next generation of high-speed indoor wireless communication. In this paper, we investigate the performance of the 32-quadrature amplitude modulation (32-QAM) constellation shaping schemes for the first time, where two special circular constellations, named Circular (4, 11, 17) and Circular (1, 5, 11, 15), and a triangular constellation are proposed based on the Shannon’s criterion. Theoretical analysis indicates that the triangular constellation scheme has the largest minimum Euclidian distance while the Circular (4, 11, 17) scheme achieves the lowest peak-to-average power ratio (PAPR). Experimental results show that the bit error rate performance is finally decided by the value of PAPR in the VLC system due to the serious nonlinearity of the LED, where the Circular (4, 11, 17) scheme always performs best under the 7% preforward error correction threshold of 3.8 × 10−3 with 62.5Mb/s transmission data rate and 1-meter transmission distance.

scholarly journals Superposed pulse amplitude modulation for visible light communication

2013 ◽  
Vol 21 (25) ◽  
pp. 31006 ◽  
Author(s):  
J. F. Li ◽  
Z. T. Huang ◽  
R. Q. Zhang ◽  
F. X. Zeng ◽  
M. Jiang ◽  
...  
Keyword(s):  
Visible Light ◽  
Amplitude Modulation ◽  
Pulse Amplitude ◽  
Visible Light Communication ◽  
Pulse Amplitude Modulation

Trellis-coded pulse amplitude modulation for indoor visible light communication

2013 ◽  
Author(s):  
Yu Wang ◽  
Aiying Yang ◽  
Yongsheng Wu ◽  
Lihui Feng ◽  
Yu-nan Sun ◽  
...  
Keyword(s):  
Visible Light ◽  
Amplitude Modulation ◽  
Pulse Amplitude ◽  
Visible Light Communication ◽  
Pulse Amplitude Modulation ◽  
Trellis Coded

Peak-to-Average Power Ratio Distribution of OFDM Visible Light Communication Systems

2014 ◽  
Vol 519-520 ◽  
pp. 987-990
Author(s):  
Bing Yan Yu ◽  
Hong Ming Zhang
Keyword(s):  
Visible Light ◽  
Communication Systems ◽  
Orthogonal Frequency Division Multiplexing ◽  
Direct Detection ◽  
Average Power ◽  
Visible Light Communication ◽  
Closed Form Expression ◽  
Power Ratio ◽  
Ratio Distribution ◽  
Ofdm Signal

This paper studies the Peak-to-Average Power Ratio (PAPR) distribution in orthogonal frequency division multiplexing (OFDM) signal of visible light communication (VLC) systems with intensity modulation direct detection (IM/DD). In this paper, a closed form expression of PAPR distribution in OFDM-VLC signals is derived, with unequal power allocation to subcarriers is considered. Simulation with different number of subcarriers is conducted. The numerical results show the proposed distribution expression matches well with the result obtained by simulation.

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