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随着可见光通信(Visible Light Communication,VLC)技术的迅速发展,正交频分复用(Orthogonal Frequency-Division Multiplexing,OFDM)技术因为其抗多径衰落和频谱利用率高等优点被广泛应用于VLC系统中,但其高峰均比(Peak-to-Average Power Radio,PAPR)对系统性能影响较大。因此,针对可见光OFDM系统中PAPR抑制技术进行了综述研究。对可见光OFDM系统、可见光OFDM系统中PAPR的概念与模型、PAPR对可见光OFDM系统的影响以及PAPR抑制技术等方面进行了分析,着重讨论了可见光OFDM系统中PAPR抑制技术的研究进展,总结并分析了目前PAPR抑制技术的研究中需亟待解决的问题,为进一步进行相关研究提供理论指导。 相似文献
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A novel phase noise (PN) compensation algorithm based on the decision feedback (DF) algorithm and the linear combination self cancellation (LCSC) algorithm is proposed to improve the system performance degradation caused by laser linewidth in coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. In this proposed LCSC-DF algorithm, the LCSC algorithm is used to precode the subcarrier information at the transmitter and decode the demodulation information and inter-carrier interference (ICI) related information at the receiver. And then the pilot information is used to obtain the final compensation signal by the improved DF algorithm. The simulation results show that the PN compensation performance of the proposed LCSC-DF algorithm is better than that of the DF algorithm. Furthermore, with the increase of the signal to noise ratio (SNR), its bit error rate (BER) performance approaches to that of the SC-DF algorithm at the larger PN linewidth. The subcarriers utilization ratio of the proposed algorithm is higher than that of the SC-DF algorithm. As a result, the proposed algorithm can effectively improve the performance of the system. 相似文献
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