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A New Nonlinear Companding Algorithm Based on Tangent Linearization Processing for PAPR Reduction in OFDM Systems

  • 编号:
    0023087E72819F21D62EC55850FB8831
  • 作者:
    Liu, KaiMing(刘凯明)#*[1,2] Wang, Li(王莉)[1] Liu, Yuan'an[1,2]
  • 地址:

    [1]Beijing Univ Posts & Telecommun, Sch Elect Engn, Beijing 100876, Peoples R China.

    [2]Beijing Univ Posts & Telecommun, Beijing Key Lab Work Safety Intelligent Monitorin, Beijing 100876, Peoples R China.

  • 语种:
    英文
  • 期刊:
    CHINA COMMUNICATIONS ISSN:1673-5447 2020 年 17 卷 8 期 (133 - 146) ; AUG
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  • 关键词:
  • 摘要:

    In this paper. a novel nonlinear companding transform (NCT) is proposed to reduce the Peak-to-Average Power Ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. The companding function is designed based on continuously differentiable reshaping of the probability density function (PDF) of signal amplitudes. The original PDF is cut off for PAPR reduction, and lower and medium segments of original PDF are scaled and linearized respectively, for maintaining power and cumulative distribution constraints. The linearized segment is set to be the tangent of the scaled version at the inflexion point, so as to reduce the out-of-band (OOB) radiation as much as possible. Parameters of the proposed scheme are solved under joint constraints of constant power and unity cumulative distribution. A new receiving method is also proposed to improve the bit error rate (BER) performance of OFDM systems. Simulation results indicate the proposed scheme can achieve better OOB radiation and BER performance at same PAPR levels, compared with existing similar companding algorithms.

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  • 基金信息:
    National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [61821001]; Science and Technology Key Project of Guangdong Province, China [2019B010157001]
  • 推荐引用方式
    GB/T 7714:
    Liu Kaiming,Wang Li,Liu Yuan'an, et al. A New Nonlinear Companding Algorithm Based on Tangent Linearization Processing for PAPR Reduction in OFDM Systems [J].CHINA COMMUNICATIONS,2020,17(8):133-146.
  • APA:
    Liu Kaiming,Wang Li,Liu Yuan'an.(2020).A New Nonlinear Companding Algorithm Based on Tangent Linearization Processing for PAPR Reduction in OFDM Systems .CHINA COMMUNICATIONS,17(8):133-146.
  • MLA:
    Liu Kaiming, et al. "A New Nonlinear Companding Algorithm Based on Tangent Linearization Processing for PAPR Reduction in OFDM Systems" .CHINA COMMUNICATIONS 17,8(2020):133-146.
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