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

Vivek Yenamandra, Feiran Lei, Saleh Al-Araji, Nazar Ali, Mohammed Ismail

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

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.

Original languageBritish English
Title of host publication2012 19th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2012
Pages312-315
Number of pages4
DOIs
StatePublished - 2012
Event2012 19th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2012 - Seville, Seville, Spain
Duration: 9 Dec 201212 Dec 2012

Publication series

Name2012 19th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2012

Conference

Conference2012 19th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2012
Country/TerritorySpain
CitySeville, Seville
Period9/12/1212/12/12

Keywords

  • Adaptive Companding
  • BER Improvement
  • MIMO
  • OFDM
  • PAPR Reduction

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