TY - GEN
T1 - PAPR reduction of amplify-and-forward relay OFDM system using subcarrier pairing method
AU - Harum, Norharyati Binti
AU - Yuda, Kouki
AU - Ohtsuki, Tomoaki
PY - 2013/12/1
Y1 - 2013/12/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84893208690&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84893208690&partnerID=8YFLogxK
U2 - 10.1109/PIMRC.2013.6666473
DO - 10.1109/PIMRC.2013.6666473
M3 - Conference contribution
AN - SCOPUS:84893208690
SN - 9781467362351
T3 - IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
SP - 2005
EP - 2010
BT - 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013
T2 - 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013
Y2 - 8 September 2013 through 11 September 2013
ER -