A Generalized Piecewise Linear Companding Transform for PAPR Reduction in OFDM Systems
A Generalized Piecewise Linear Companding Transform for PAPR Reduction in OFDM Systems
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正交频分复用系统中用于降低 PAPR 的广义分段线性压扩变换
DOI:
10.1109/tbc.2019.2909183
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发表时间:
2020-03
影响因子:
4.5
通讯作者:
张海林
中科院分区:
文献类型:
--
作者:
胡梅霞;王伟;程文驰;张海林
Companding is a well-known technique for the peak-to-average-power ratio (PAPR) reduction of orthogonal frequency division multiplexing (OFDM) signals. Piecewise linear companding (PLC) scheme, compared with other companding schemes, can effectively reduce PAPR with much lower complexity, while achieving improved bit-error-rate (BER) performance. However, when the PAPR target value for companded signals is relatively small, such as 4 dB for 16-QAM or 5 dB for 64-QAM, there is a clear error floor of PLC in high SNR region for high-order QAM modulation. Focusing on this problem, we first analyze the reason for the error floor of PLC. Based on the analysis, we propose a generalized PLC scheme to reduce the distortion in decompanded signals with the relaxation of the constraint on the conservation of the average signal power. Finally, we formulate the optimization problems to obtain the parameters of the companding function in the pursuit of a preferable tradeoff between the BER and power spectral density performance under the constraint on PAPR. Simulation results verify that the proposed generalized PLC can significantly improve the BER performance while maintaining the same PAPR performance as PLC.
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DOI:
10.1109/vetecf.2010.5594446
发表时间:
2010-10
期刊:
2010 IEEE 72nd Vehicular Technology Conference - Fall
影响因子:
--
作者:
T. Helaly;R. Dansereau;M. El-Tanany
通讯作者:
T. Helaly;R. Dansereau;M. El-Tanany
DOI:
10.1109/tbc.2012.2198976
发表时间:
2012-06
期刊:
IEEE trans. on Broadcasting
影响因子:
--
作者:
王勇
通讯作者:
王勇
影响因子:
4.5
作者:
S. Jeng;Jia-Ming Chen
通讯作者:
S. Jeng;Jia-Ming Chen
影响因子:
4.5
作者:
Hu, Meixia;Li, Yongzhao;Zhang, Hailin
通讯作者:
Zhang, Hailin
影响因子:
1.6
作者:
Hu Meixia;Li Yongzhao;Liu Yi;Zhang Hailin
通讯作者:
Zhang Hailin