Paper Info
Title
Low-Complexity and Robust PAPR Reduction and LED Nonlinearity Mitigation for UACO-OFDM LiFi Systems
Abstract
We propose a low-complexity and high-performance joint peak-to-average power ratio (PAPR) reduction and light emitting diode (LED) nonlinearity mitigation approach for unipolar asymmetrically clipped optical-orthogonal frequency division multiplexing (UACO-OFDM) based light fidelity (LiFi) systems. This is the first reported work to apply nonlinear compression based on mu-law companding for UACO-OFDM LiFi systems to reduce PAPR. In order to avoid the effect of the nonlinearity of LED, the transmitted signals are compressed further linearly. The signal distortion caused by nonlinear and linear compression is compensated for using multiple LEDs for simultaneous transmission. The proposed joint PAPR reduction and LED nonlinearity mitigation approach provides low complexity, searching is not required. Also, it is spectrum- and energy- efficient, requiring no pilot and consuming no extra transmission power. Simulation results show that the proposed approach significantly outperforms the state-of-the-art methods in terms of complementary cumulative distribution function (CCDF) and bit error rate (BER), and that it is more robust against the LED nonlinearity than conventional UACO-OFDM LiFi systems and other methods in the literature.
Year
DOI
Venue
2019
10.1109/ICC.2019.8761898
IEEE International Conference on Communications
Field
DocType
ISSN
Nonlinear system,Computer science,Frequency-division multiplexing,Electronic engineering,Real-time computing,Cumulative distribution function,Companding,Light-emitting diode,Distortion,Orthogonal frequency-division multiplexing,Bit error rate
Conference
1550-3607
Citations 
PageRank 
References 
0
0.34
0
Authors
4
Name
Order
Citations
PageRank
Hongkun Liu100.34
Yufei Jiang23222.37
Xu Zhu337147.63
Tong Wang413933.85