A post-coding scheme for peak-to-average power ratio reduction in intensity modulated optical OFDM systems

A post-coding scheme for peak-to-average power ratio reduction in intensity modulated optical OFDM systems

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摘要 An efficient post-coding strategy is proposed in this letter to reduce the peak-to-average power ratio(PAPR) of orthogonal frequency division multiplexing(OFDM) signals for optical intensity modulated direct detection(IM/DD) systems. The post-coding scheme based on discrete cosine transform(DCT) is employed after the inverse fast Fourier transform(IFFT) in the transmitter to reduce the PAPR of OFDM signals. This method is different from the conventional pre-coding scheme which is employed before IFFT operation. Numerical simulations demonstrate that the new DCT post-coding strategy can significantly reduce the PAPR than the conventional pre-coding scheme. Meantime, the bit error rate(BER) performance of the proposed post-coding system can be improved compared with the conventional pre-coding scheme. An efficient post-coding strategy is proposed in this letter to reduce the peak-to-average power ratio （PAPR） of orthogonal frequency division multiplexing （OFDM） signals for optical intensity modulated direct detection （IM/DD） systems. The post-coding scheme based on discrete cgsine transform （DCT） is employed after the inverse fast Fourier transform （IFFT） in the transmitter to reduce the PAPR of OFDM signals. This method is different from the conventional pre-coding scheme which is employed before IFFT operation. Numerical simulations demonstrate that the new DCT post-coding strategy can significantly reduce the PAPR than the conventional pre-coding scheme. Meantime, the bit error rate （BER） performance of the proposed post-coding system can be improved compared with the conventional pre-coding scheme.

作者陈芳妮王中鹏

机构地区 School of Information and Electronic Engineering Zhejiang University of Science and Technology State Key Laboratory of Millimeter Waves Southeast University

出处《Optoelectronics Letters》 EI 2014年第4期295-298,共4页 光电子快报（英文版）

基金 supported by the Open Fund of the State Key Laboratory of Millimeter Waves(No.K201214) Zhejiang Provincial Natural Science Foundation of China(No.LY13F050005)

关键词 OFDM系统峰均功率比编码策略平均强度 OFDM信号调光比降正交频分复用

分类号 TN929.1 [电子电信—通信与信息系统]

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Optoelectronics Letters

2014年第4期

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A post-coding scheme for peak-to-average power ratio reduction in intensity modulated optical OFDM systems

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