TY - GEN
T1 - Peak power reduction method based on structure of parity-check matrix for LDPC coded OFDM transmission
AU - Muta, Osamu
AU - Akaiwa, Yoshihiko
PY - 2007/8/2
Y1 - 2007/8/2
N2 - In this paper, we propose a peak power reduction method for LDPC coded OFDM system, where transmit data sequence is grouped into several clusters based on structure of a low density parity-check matrix and the phase of each cluster is adjusted so as to minimize PAPR of OFDM signal by multiplying weighting factors (WFs). At the receiver, WFs are estimated with sufficient accuracy by exploiting the decoding property of LDPC code. The proposed method can be applied to not only systematic coded signal but also non-systematic one. Computer simulation results show that, when LDPC code with code-rate of R ≈ 1/2 is used, PAPR of OFDM signal can be reduced by about 2.4dB without significant degradation in BLER performance as compared to perfect WF estimation in attenuated 12-path Rayleigh fading condition.
AB - In this paper, we propose a peak power reduction method for LDPC coded OFDM system, where transmit data sequence is grouped into several clusters based on structure of a low density parity-check matrix and the phase of each cluster is adjusted so as to minimize PAPR of OFDM signal by multiplying weighting factors (WFs). At the receiver, WFs are estimated with sufficient accuracy by exploiting the decoding property of LDPC code. The proposed method can be applied to not only systematic coded signal but also non-systematic one. Computer simulation results show that, when LDPC code with code-rate of R ≈ 1/2 is used, PAPR of OFDM signal can be reduced by about 2.4dB without significant degradation in BLER performance as compared to perfect WF estimation in attenuated 12-path Rayleigh fading condition.
UR - http://www.scopus.com/inward/record.url?scp=34547275079&partnerID=8YFLogxK
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U2 - 10.1109/VETECS.2007.583
DO - 10.1109/VETECS.2007.583
M3 - Conference contribution
AN - SCOPUS:34547275079
SN - 1424402662
SN - 9781424402663
T3 - IEEE Vehicular Technology Conference
SP - 2841
EP - 2845
BT - 2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring
T2 - 2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring
Y2 - 22 April 2007 through 25 April 2007
ER -