TY - GEN
T1 - A Low-Complexity PAPR Reduction Scheme for Multi-User MIMO-OFDM Systems
AU - Zhang, Xi
AU - Zheng, Zhong
AU - Fei, Zesong
AU - Yu, Weihua
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Multi-user multiple-input multiple-output orthogonal frequency division multiplexing (MU-MIMO-OFDM) is an attractive technique for high-data-rate transmission. However, one main disadvantage of the MU-MIMO-OFDM system is the high peak-to-average power ratio (PAPR), which causes inefficient power amplifier utilization and limits the transmit power. To address this issue, some effective PAPR reduction schemes, such as the conventional active constellation extension (ACE), can be applied for the MU-MIMO-OFDM systems, which limits the maximum amplitude of the signals by iteratively modifying the signal constellation. However, the iterative signal processing procedures induce excessive computation complexity and delay, which is prohibited in high data rate communications. In this paper, we propose a low-complexity PAPR reduction method, where an improved tone reservation (ITR) scheme based on least square approximation (LSA) is first performed, and then the modified ACE scheme is appiled to further decrease the PAPR. Compared to the conventional ACE scheme, simulation results show that the proposed method significantly reduces computational complexity without sacrificing BER, and achieves better PAPR.
AB - Multi-user multiple-input multiple-output orthogonal frequency division multiplexing (MU-MIMO-OFDM) is an attractive technique for high-data-rate transmission. However, one main disadvantage of the MU-MIMO-OFDM system is the high peak-to-average power ratio (PAPR), which causes inefficient power amplifier utilization and limits the transmit power. To address this issue, some effective PAPR reduction schemes, such as the conventional active constellation extension (ACE), can be applied for the MU-MIMO-OFDM systems, which limits the maximum amplitude of the signals by iteratively modifying the signal constellation. However, the iterative signal processing procedures induce excessive computation complexity and delay, which is prohibited in high data rate communications. In this paper, we propose a low-complexity PAPR reduction method, where an improved tone reservation (ITR) scheme based on least square approximation (LSA) is first performed, and then the modified ACE scheme is appiled to further decrease the PAPR. Compared to the conventional ACE scheme, simulation results show that the proposed method significantly reduces computational complexity without sacrificing BER, and achieves better PAPR.
KW - MU-MIMO-OFDM
KW - active constellation extension
KW - peak-to-average power ratio
KW - tone reservation
UR - http://www.scopus.com/inward/record.url?scp=85173005240&partnerID=8YFLogxK
U2 - 10.1109/ICCC57788.2023.10233292
DO - 10.1109/ICCC57788.2023.10233292
M3 - Conference contribution
AN - SCOPUS:85173005240
T3 - 2023 IEEE/CIC International Conference on Communications in China, ICCC 2023
BT - 2023 IEEE/CIC International Conference on Communications in China, ICCC 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE/CIC International Conference on Communications in China, ICCC 2023
Y2 - 10 August 2023 through 12 August 2023
ER -