Companding transform for reduction in peak-to-average power ratio of OFDM signals

A general companding transform method is proposed to effectively reduce peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. By compressing large signals while enhancing small signals along with taking into account their statistical characteristics, this m...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2004-11, Vol.3 (6), p.2030-2039
Main Authors: Xiao Huang, Jianhua Lu, Junli Zheng, Letaief, K.B., Jun Gu
Format: Article
Language:English
Subjects:
Additive noise
Applied sciences
Bit error rate
Channels
Companding
Companding transform
Compressing
Degradation
Exact sciences and technology
Frequency division multiplexing
Gaussian noise
Information, signal and communications theory
Multiplexing
Noise level
OFDM
Optical wavelength conversion
Orthogonal Frequency Division Multiplexing
orthogonal frequency division multiplexing (OFDM)
Peak to average power ratio
peak-to-average power ratio (PAPR)
Reduction
Signal and communications theory
Signal processing
Simulation
Telecommunications and information theory
Transforms
Wireless communication
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Summary:A general companding transform method is proposed to effectively reduce peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. By compressing large signals while enhancing small signals along with taking into account their statistical characteristics, this method can achieve significant reduction in PAPR with low implementation complexity. Specifically, we present the design criteria of the transform, which enable effective tradeoff between reduction in PAPR and bit-error rate performance of the OFDM system. It is shown by simulations that the proposed method may significantly improve the performance of OFDM systems in radio channels by carefully choosing the companding form and parameters.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2004.837619