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Novel Nonlinear Companding Transform for PAPR Reduction
2019In this paper, a novel technique to control the Peak-to-Average Power Ratio (PAPR) in Non-Continuous Orthogonal Frequency Division Multiplexing with Offset Quadrature Amplitude Modulation (NC-OFDM/OQAM) is proposed. When compared with conventional NC-OFDM systems the corresponding PAPR seems to be increasing which is a disadvantage.
N. Renuka, M. Satya Sairam
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PAPR Reduction in Universal Filtered Multicarrier Systems with Companding Transform
2020 Third International Conference on Advances in Electronics, Computers and Communications (ICAECC), 2020Universal filtered multi carrier (UFMC) is an alternative waveform for both orthogonal frequency division multiplexing and filter bank multi carrier. High spectral efficiency is the attractive feature of 5G UFMC system. However, UFMC undergoes with high peak-to-average power ratio (PAPR), which affects the efficiency of power amplifier.
Vijaya Durga Chintala, Anuradha Sundru
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Exponential Companding Transform to Mitigate PAPR in SC-FDMA Systems
2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring), 2019Long Term Evolution (LTE) chose Single Carrier Frequency Division Multiple Access (SC-FDMA) for uplink communications due to lower signal envelope changes in SC-FDMA signal. This enables low peak to average power ratio (PAPR) in SC-FDMA in contrast to Orthogonal Frequency Division Multiple Access (OFDMA).
K. Shri Ramtej, S. Anuradha
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Nonlinear Companding Transform Using Hyperbolic Tangent Function in OFDM Systems
2012 8th International Conference on Wireless Communications, Networking and Mobile Computing, 2012A new nonlinear companding transform (NCT) scheme is proposed to reduce the peak-to-average power ratio (PAPR) of transmitted signals in orthogonal frequency division multiplexing (OFDM) systems. Its companding transfer curve is based on the specified hyperbolic tangent function.
Y. Wang, J.-H Ge, L.-H. Wang, B. Ai
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Companding transform for PAPR reduction in coherent optical OFDM system
2012 21st Annual Wireless and Optical Communications Conference (WOCC), 2012µ-law companding and de-companding, which enlarges small signals and compresses large signals, can work successfully in the CO-OFDM transmission system, and µ=1 is the optimal companding coefficient for PAPR reduction.
Xinying Li +8 more
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Two-piecewise companding transform for PAPR reduction of OFDM signals
2011 7th International Wireless Communications and Mobile Computing Conference, 2011To reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals, a two-piecewise companding (TPWC) transform is proposed so as to compress large signal amplitudes and expand small ones with two different linear functions.
Pinlu Yang, Aiqun Hu
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Reversible Data Hiding Using Integer Wavelet Transform and Companding Technique
2005This paper presents a novel reversible data-embedding method for digital images using integer wavelet transform and companding technique. This scheme takes advantage of the Laplacian-like distribution of integer wavelet coefficients in high frequency subbands, which facilitates the selection of compression and expansion functions and keeps the ...
Guorong Xuan +4 more
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A High-Rate Optimal Transform Coder With Gaussian Mixture Companders
IEEE Transactions on Audio, Speech and Language Processing, 2007This paper examines the problem of designing fixed-rate transform coders for sources whose distributions are unknown and presumably non-Gaussian, under input-weighted squared error distortion measures. As a component of this system, a flexible scalar compander based on Gaussian mixtures is proposed.
Ethan R. Duni, Bhaskar D. Rao
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Companding Transform Assisted Constant Envelope OFDM
2023 IEEE 97th Vehicular Technology Conference (VTC2023-Spring), 2023Chongda Huang, Lilin Dan, Yue Xiao
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A Novel Piecewise Nonlinear Companding Transform for PAPR Reduction in GFDM
2018 10th International Conference on Wireless Communications and Signal Processing (WCSP), 2018Similar to the widely used orthogonal frequency division multiplexing (OFDM) scheme, Generalized Frequency Division Multiplexing (GFDM) system suffers from the problem of the high peak-to-average power ratio (PAPR). In this paper, we propose an efficient piecewise nonlinear companding transform for PAPR reduction of GFDM signals and a novel iterative ...
Yinghua Li, WeiFeng Deng
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