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A Novel Approach for PAPR Reduction in OFDM-Based Visible Light Communications

机译:基于OFDM的可见光通信中降低PAPR的新方法

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One of the best techniques to increase data rate and improve spectral efficiency for indoor visible light communication (VLC) is by employing Orthogonal Frequency Division Multiplexing (OFDM). To efficiently exploit the optical bandwidth, we propose a novel transmission approach for OFDM based VLC that increases the bandwidth efficiency by 50% compared to conventional optical OFDM systems. Unlike existing approaches of OFDM-based VLC systems, the real and positive signal is obtained without the Hermitian symmetry and signal clipping. Through simulation results, the proposed scheme shows significant peak-to-average power ratio (PAPR) reduction can be achieved, namely up to 10dB compared to the conventional asymmetrically clipped optical OFDM (ACO-OFDM) and 5dB compared to DC biased optical OFDM (DCO-OFDM) at complementary cumulative distribution function (CCDF) of 10-1 with acceptable bit-error-rate (BER) performance.
机译:为室内可见光通信(VLC)增加数据速率并提高频谱效率的最佳技术之一是采用正交频分复用(OFDM)。为了有效地利用光带宽,我们为基于OFDM的VLC提出了一种新颖的传输方法,与传统的光学OFDM系统相比,该方法将带宽效率提高了50%。与基于OFDM的VLC系统的现有方法不同,在没有Hermitian对称性和信号削波的情况下获得了真实信号和正信号。通过仿真结果,所提出的方案显示可以实现显着的峰均功率比(PAPR)降低,即与传统的非对称削波光学OFDM(ACO-OFDM)相比可降低10dB,与DC偏置光OFDM相比可降低5dB(互补累积分布函数(CCDF)为10-1且具有可接受的误码率(BER)性能。

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