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Twofold peak-to-average power ratio reduction technique in direct-detection optical orthogonal frequency division multiplexing system

机译：直接检测光学正交频分复用系统中峰均功率比降低两倍的技术

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摘要

High peak-to-average power ratio (PAPR) of the orthogonal frequency division multiplexing (OFDM) signal is one of the limitations to the transmission performance of an optical OFDM system. Many PAPR reduction techniques have been proposed in previous works. However, most of them only consider a single scheme while overlooking the complementary features of these techniques. We propose a twofold PAPR reduction technique called Hadamard transform combined with a partial transmit sequence (PTS) (HTCP). The proposed HTCP scheme combines the merits of two complementary techniques, i.e., Hadamard transform and PTS, to improve the performance of the optical OFDM system in terms of PAPR and bit error rate (BER). Furthermore, the side information generated in PTS is transmitted by pilot sequences which increase the utilization of subcarriers. Least square estimation is used to estimate the pilot signal's phase to recover the side information. The HTCP scheme is theoretically analyzed in a direct-detection optical OFDM system. Simulation results show that the HTCP scheme has a better performance with regards to PAPR and BER compared with the case of applying only the Hadamard transform or PTS technique
机译：正交频分复用（OFDM）信号的高峰均功率比（PAPR）是对光学OFDM系统的传输性能的限制之一。在先前的工作中已经提出了许多降低PAPR的技术。但是，大多数人在忽略这些技术的互补功能时只考虑一种方案。我们提出了一种称为Hadamard变换的双重PAPR缩减技术，该技术与部分传输序列（PTS）（HTCP）相结合。提出的HTCP方案结合了Hadamard变换和PTS两种互补技术的优点，从PAPR和误码率（BER）方面改善了光OFDM系统的性能。此外，在PTS中生成的辅助信息通过导频序列发送，这增加了子载波的利用率。最小二乘估计用于估计导频信号的相位以恢复辅助信息。 HTCP方案在直接检测光学OFDM系统中进行了理论分析。仿真结果表明，与仅应用Hadamard变换或PTS技术的情况相比，HTCP方案在PAPR和BER方面具有更好的性能。

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  • 来源
    《Optical engineering》 |2015年第3期|036102.1-036102.9|共9页
  • 作者

    Lei Guo; Hui Li; Yejun Liu; Xiaoxue Gong; Yufang Zhou;

  • 作者单位

    Northeastern University, College of Information Science and Engineering, Shenyang 110819, China;

    Northeastern University, College of Information Science and Engineering, Shenyang 110819, China;

    Northeastern University, College of Information Science and Engineering, Shenyang 110819, China;

    Northeastern University, College of Information Science and Engineering, Shenyang 110819, China;

    Northeastern University, College of Information Science and Engineering, Shenyang 110819, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    optical orthogonal frequency division multiplexing; Hadamard transform; partial transmit sequence; peak-to-average power ratio;

    机译：光正交频分复用;哈达玛变换部分发送序列;峰均功率比;

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