DocumentCode :
2612655
Title :
High Power Efficiency and Low Nonlinear Distortion for Wireless Visible Light Communication
Author :
Ryu, Sang-Burm ; Choi, Jae-Hoon ; Bok, Junyeong ; Lee, HuiKyu ; Ryu, Heung-Gyoon
Author_Institution :
Dept. of Electron. Eng., Chungbuk Nat. Univ., Cheongju, South Korea
fYear :
2011
fDate :
7-10 Feb. 2011
Firstpage :
1
Lastpage :
5
Abstract :
High power efficiency and low nonlinear distortion is very important for wireless visible light communication system. OFDM (orthogonal frequency division multiplexing) system has been studied a lot as the method to transmit high speed data in wireless visible light communication system. However, OFDM system has drawbacks which are non-linear distortion by high PAPR characteristic and ICI problem occurred by RF impairments. In wireless visible light communication system, output power of visible light which is generated by driven current of LED (light emission diode) has non-linear characteristic. Therefore, transmitted signal is distorted by it. Researches for receive performance of visible light output which is emitted by non-linear LED transfer function and OFDM signal have been studied. In this paper, we suggest a new PAPR reduction technique to reduce non-linear distortion of LED for reducing the PAPR. Also, we propose an adaptive ICI suppression algorithm in order to improve receive performance through enhanced SNR (signal to noise power ratio) by an adaptive channel estimation method of proposed algorithm. Improved performance of proposed system is verified through computer simulation.
Keywords :
OFDM modulation; adaptive estimation; channel estimation; intercarrier interference; interference suppression; light emitting diodes; nonlinear distortion; optical communication; optical distortion; transfer functions; LED; OFDM system; PAPR reduction technique; RF impairments; SNR; adaptive ICI suppression algorithm; adaptive channel estimation method; computer simulation; high PAPR characteristic; high power efficiency; light emission diode; low nonlinear distortion reduction; nonlinear LED transfer function; orthogonal frequency division multiplexing system; signal to noise power ratio; wireless visible light communication system; Bit error rate; Discrete Fourier transforms; Light emitting diodes; Modulation; Nonlinear distortion; Peak to average power ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
New Technologies, Mobility and Security (NTMS), 2011 4th IFIP International Conference on
Conference_Location :
Paris
ISSN :
2157-4952
Print_ISBN :
978-1-4244-8705-9
Electronic_ISBN :
2157-4952
Type :
conf
DOI :
10.1109/NTMS.2011.5720581
Filename :
5720581
Link To Document :
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