中国邮电高校学报(英文)

• Wireless •    下一篇

Threshold-based piecewise companding transform for PAPR reduction in OFDM systems

刘淑华1,张海林1,李勇朝2,2,刘英挺2,2   

  1. 1. 西安电子科技大学
    2.
  • 收稿日期:2012-09-06 修回日期:2012-12-10 出版日期:2013-04-30 发布日期:2013-04-26
  • 通讯作者: 刘淑华 E-mail:liu.shuhua@126.com
  • 基金资助:

    This work was supported by the National Natural Science Foundation of China (61072069), the Fundamental Research Funds for the Central Universities (72105242), and the 111 Project (B08038)

Threshold-based piecewise companding transform for PAPR reduction in OFDM systems

  • Received:2012-09-06 Revised:2012-12-10 Online:2013-04-30 Published:2013-04-26
  • Contact: Shu-Hua LIU E-mail:liu.shuhua@126.com
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (61072069), the Fundamental Research Funds for the Central Universities (72105242), and the 111 Project (B08038)

摘要:

Piecewise companding transform is a flexible and efficient way to solve the high peak-to-average power ratio (PAPR) problem for orthogonal frequency division multiplexing (OFDM) systems. A novel threshold-based piecewise companding transform is proposed in this paper. Based on the statistical characteristics of amplitudes, OFDM signals are classified into three groups (i.e., small, average and large signals). Different from conventional approaches, two dedicated designed thresholds are set to amplify the small signals and compress the large signals, respectively. Simulation results verify the improvement in PAPR reduction of the proposed scheme. Moreover, a lower bit error rate (BER) performance loss can be obtained by introducing the iterative detection with a moderate increase in complexity.

关键词:

OFDM, PAPR, companding transform, iterative detection

Abstract:

Piecewise companding transform is a flexible and efficient way to solve the high peak-to-average power ratio (PAPR) problem for orthogonal frequency division multiplexing (OFDM) systems. A novel threshold-based piecewise companding transform is proposed in this paper. Based on the statistical characteristics of amplitudes, OFDM signals are classified into three groups (i.e., small, average and large signals). Different from conventional approaches, two dedicated designed thresholds are set to amplify the small signals and compress the large signals, respectively. Simulation results verify the improvement in PAPR reduction of the proposed scheme. Moreover, a lower bit error rate (BER) performance loss can be obtained by introducing the iterative detection with a moderate increase in complexity.

Key words:

OFDM, PAPR, companding transform, iterative detection