PAPR reduction of amplify-and-forward relay OFDM system using subcarrier pairing method

Norharyati Binti Harum, Kouki Yuda, Tomoaki Ohtsuki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Best-to-worst (BTW) subcarrier pairing (SCP) has been discussed as a technique in orthogonal frequency division multiplexing (OFDM)-based amplify-and-forward (AF) relay networks, owing to a good bit error rate (BER) performance. However, the technique does not consider peak to average power ratio (PAPR), where the PAPR must be kept as low as possible to use a low cost power amplifier (PA) at relay node (RN). PAPR reduction technique should be applied in RN, because lower PAPR in source node (SN) using PAPR reduction technique might not be maintained in RN owing to channel effects between SN and RN. We propose a new approach of BTW SCP technique, S-BTW (shifted BTW) that can perform a low PAPR as well as good BER performance. After BTW reordering, we calculate PAPR and compare the value with a threshold value. If the PAPR cannot achieve the required PAPR value, the subcarrier is one-by-one circularly shifted until reaching a maximum number of shifts. For the case that the required PAPR cannot be achieved after reaching maximum number of shifts, we propose a combination of the S-BTW and clipping. Both simulation and theoretical analysis is performed to prove the validity of our proposal.

Original languageEnglish
Title of host publication2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013
Pages2005-2010
Number of pages6
DOIs
Publication statusPublished - 2013 Dec 1
Event2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013 - London, United Kingdom
Duration: 2013 Sep 82013 Sep 11

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

Other

Other2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013
CountryUnited Kingdom
CityLondon
Period13/9/813/9/11

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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    Harum, N. B., Yuda, K., & Ohtsuki, T. (2013). PAPR reduction of amplify-and-forward relay OFDM system using subcarrier pairing method. In 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013 (pp. 2005-2010). [6666473] (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC). https://doi.org/10.1109/PIMRC.2013.6666473