• DocumentCode
    597015
  • Title

    Adaptive slope and threshold companding technique for PAPR reduction in OFDM systems

  • Author

    Yenamandra, V. ; Feiran Lei ; Al-Araji, Saleh ; Ali, Nawazish ; Ismail, Mahamod

  • Author_Institution
    Analog VLSI Lab., Ohio State Univ., Columbus, OH, USA
  • fYear
    2012
  • fDate
    9-12 Dec. 2012
  • Firstpage
    312
  • Lastpage
    315
  • Abstract
    High Peak to Average Power Ratio (PAPR) of transmitted signals is a major drawback for multi-carrier modulation systems such as orthogonal frequency division multiplexing (OFDM) systems. Companding technique has been recently used to reduce PAPR. In this work, an adaptive slope and threshold (AST) companding transform is proposed to increase the reduction in PAPR with minimum degradation of received bit error rate (BER). The key idea is to adaptively vary both the slope of expansion and the threshold for expansion of the input signal amplitude to optimize the PAPR/BER tradeoff. This is implemented by selecting slope and threshold ratios in real-time from a look-up table (LUT) on the basis of the received feedback, making it adaptive.
  • Keywords
    OFDM modulation; error statistics; feedback; AST; LUT; OFDM systems; PAPR reduction; PAPR-BER tradeoff; adaptive slope; adaptive slope and threshold; bit error rate; companding transform; high peak to average power ratio; look-up table; multicarrier modulation systems; orthogonal frequency division multiplexing; received feedback; threshold companding technique; transmitted signals; Adaptive systems; Bit error rate; Peak to average power ratio; Receivers; Signal to noise ratio; Transforms; Adaptive Companding; BER Improvement; MIMO; OFDM; PAPR Reduction;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Electronics, Circuits and Systems (ICECS), 2012 19th IEEE International Conference on
  • Conference_Location
    Seville
  • Print_ISBN
    978-1-4673-1261-5
  • Electronic_ISBN
    978-1-4673-1259-2
  • Type

    conf

  • DOI
    10.1109/ICECS.2012.6463739
  • Filename
    6463739