Abstract

Layered asymmetrically clipped optical orthogonal frequency division multiplexing (LACO-OFDM) has a high spectral efficiency. However, an iterative detection with a pair of fast Fourier transform (FFT) and inverse fast Fourier transform (IFFT) is required for LACO-OFDM, which increases the complexity for the receiver of LACO-OFDM. In this paper, the performance of the receiver with a single FFT is analyzed for LACO-OFDM in visible light communications. In the single-FFT receiver, the different layers of ACO-OFDM signals are distinguished in time domain without the FFT/IFFT pair. Because only one FFT is employed in the proposed receiver, the complexity of O(Nlog₂N) can be achieved, which is much lower than the complexity of the conventional LACO-OFDM receiver. Simulation results illustrate that the proposed scheme has a signal-to-noise ratio (SNR) penalty of 1dB ∼ 3dB compared with the conventional solution in additive white Gaussian noise (AWGN) channel. However, the proposed receiver outperforms conventional LACO-OFDM solution in light emitting diode (LED) nonlinearity channel.

Exploring the effect of LED nonlinearity on the performance of layered ACO-OFDM

Mohammed Abd Elkarim, M. M. Elsherbini, Hala M. AbdelKader, and Moustafa H. Aly
Appl. Opt. 59(24) 7343-7351 (2020)

Layered ACO-OFDM for intensity-modulated direct-detection optical wireless transmission

Qi Wang, Chen Qian, Xuhan Guo, Zhaocheng Wang, David G. Cunningham, and Ian H. White
Opt. Express 23(9) 12382-12393 (2015)

Layered antisymmetry-constructed clipped optical OFDM for low-complexity VLC systems

Ruowen Bai and Steve Hranilovic
Opt. Express 29(7) 10613-10630 (2021)

PAPR analysis for OFDM visible light communication

Jiaheng Wang, Yang Xu, Xintong Ling, Rong Zhang, Zhi Ding, and Chunming Zhao
Opt. Express 24(24) 27457-27474 (2016)

Comparisons of spectrally-enhanced asymmetrically-clipped optical OFDM systems

Arthur James Lowery
Opt. Express 24(4) 3950-3966 (2016)