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    Journals >Laser & Optoelectronics Progress >Volume 58 >Issue 23 >Page 2306008 > Article
    • Laser & Optoelectronics Progress
    • Vol. 58, Issue 23, 2306008 (2021)
    Pairwise Maximum Likelihood Receiver for Flip/Unipolar Orthogonal Frequency Division Multiplexing in Visible Light Communication
    Jianfeng Li1, Xiaoshuang Liu1、*, Yahao Ren1, and Zhitong Huang2
    Author Affiliations
  • 1Information Technology College, Hebei University of Economics and Business, Shijiazhuang , Hebei 050061, China
  • 2State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
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    DOI: 10.3788/LOP202158.2306008 Cite this Article Set citation alerts
    Jianfeng Li, Xiaoshuang Liu, Yahao Ren, Zhitong Huang. Pairwise Maximum Likelihood Receiver for Flip/Unipolar Orthogonal Frequency Division Multiplexing in Visible Light Communication[J]. Laser & Optoelectronics Progress, 2021, 58(23): 2306008 Copy Citation Text show less

    Abstract

    A pairwise maximum likelihood (ML) receiver is proposed for flip/unipolar orthogonal frequency division multiplexing (Flip/U-OFDM) system in visible light communication (VLC). Parts of Flip/U-OFDM signal are set at zero by pairwise ML in time domain, which can get some signal to noise ratio (SNR) gain. And the pairwise ML is a simple signal processing method, which will not increase the complexity for the receiver. Simulation results show that SNR gain of 2 dB can be available for the pairwise ML receiver in additive white Gaussian noise (AWGN) channel. SNR gain of 2 dB-3 dB will be achieved for the pairwise ML receiver in amplitude clipping channel and light emitting diode (LED) nonlinearity channel.

    Keywords

    X=[0,X1,X2,⋯,Xk,⋯,XN-1],
    xn=1N∑k=0N-1Xkexpj2πknN, n=0,1,2,…,N-1，
    xn+=xn,0,xn≥0xn<0,n=0,1,2,…,N-1。
    xn-=xn,0,xn<0xn≥0,n=0,1,2,…,N-1。
    x̂n=xn+,-xn-,n=0,1,2,…,N-1n=N,N+1,…,2N-1。
    yn=x̂n+en,    n=0,1,2,…,2N-1，
    Hn=1,0,yn≥yn+Nyn<yn+N, n=0,1,2,…,N-1，
    Hn+N=1-Hn,    n=0,1,2,…,N-1，
    ŷn=ynHn,    n=0,1,2,…,2N-1。
    y¯n=ŷn-ŷn+N,    n=0,1,2,…,N-1，
    Y¯k=1N∑n=0N-1y¯nexp-j2πknN,    k=0,1,2,…,N-1。
    x¯n=x̂n,A,     x̂n<Ax̂n≤A ，
    RCR=20lgAδ ,
    In=f(x̂n)1+f(x̂n)/Imax2a1/2a, 0,x̂n>0x̂n≤0,
    β=20lgImaxδ 。
    Abstract
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    Jianfeng Li, Xiaoshuang Liu, Yahao Ren, Zhitong Huang. Pairwise Maximum Likelihood Receiver for Flip/Unipolar Orthogonal Frequency Division Multiplexing in Visible Light Communication[J]. Laser & Optoelectronics Progress, 2021, 58(23): 2306008
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    Paper Information
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