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首页> 外文期刊>電子情報通信学会技術研究報告 >PAPR reduction and Pre-distortion techniques against Non-linear Distortion of Satellite WiBro
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PAPR reduction and Pre-distortion techniques against Non-linear Distortion of Satellite WiBro

机译：针对卫星WiBro非线性失真的PAPR降低和预失真技术

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摘要

A major drawback of Orthogonal Frequency Division Multiplexing (OFDM) system is high peak-to-average power ratio (PAPR) of the transmitted signal which introduces inevitable non-linear distortion in the transmission due to the amplifier non-linear property. This causes both in-band distortion and out of band spectrum re-growth. A polynomial based pre-distortion is estimated using the non-linear and inverse non linear polynomial achieved through the Least Square Error (LSE) method. A new technique of PAPR reduction called 'Phase Realignment' (PR) is proposed which has a optimal effect in improving the BER performance as well as considerable reduction in the PAPR. In this paper we used the PR method along with the 'Peak Clipping' (PC) method is used before the pre-distortion to remove the high peak present in the non constant amplitude of the OFDM signal responsible to drive the amplifier in near saturation region for better performance of the system.
机译：正交频分复用（OFDM）系统的主要缺点是发射信号的峰均功率比（PAPR）高，由于放大器的非线性特性，它在传输中不可避免地引入了非线性失真。这会导致带内失真和带外频谱重新增长。使用通过最小二乘误差（LSE）方法实现的非线性和逆非线性多项式，估算基于多项式的预失真。提出了一种新的PAPR降低技术，称为“相位重新对准”（PR），它在提高BER性能以及显着降低PAPR方面具有最佳效果。在本文中，我们在预失真之前使用了PR方法以及“削峰”（PC）方法，以消除OFDM信号非恒定幅度中存在的高峰值，该峰值负责驱动放大器在接近饱和区域以获得更好的系统性能。

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  • 来源
    《電子情報通信学会技術研究報告》 |2008年第274期|p.145-154|共10页
  • 作者

    Robin Shrestha; Myung Hwan Seo; Gyeong Wan Go; Byung Seub Lee;

  • 作者单位

    School of Information and Telecommunication Engineering, Korea Aerospace University 200-1 Hwajeon-dong Deogyang-gu Goyang-city Geonggi-do, KOREA412-791;

    School of Information and Telecommunication Engineering, Korea Aerospace University 200-1 Hwajeon-dong Deogyang-gu Goyang-city Geonggi-do, KOREA 412-791;

    School of Information and Telecommunication Engineering, Korea Aerospace University 200-1 Hwajeon-dong Deogyang-gu Goyang-city Geonggi-do, KOREA412-791;

    School of Information and Telecommunication Engineering, Korea Aerospace University 200-1 Hwajeon-dong Deogyang-gu Goyang-city Geonggi-do, KOREA412-791;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    satellite WiBro; OFDM; LSE; phase realignment; pre-distortion;

    机译：卫星WiBro;OFDM;LSE;相位调整预失真;

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