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An Efficient Nonlinear Companding Transform for Reducing PAPR of OFDM Signals
IEEE Transactions on Broadcasting, 2012In this paper, an efficient nonlinear companding scheme is proposed to reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. By transforming the statistics of original signals into a specified distribution form along with remaining an unchanged average output power level, this scheme can achieve ...
Y. Wang, L.-H. Wang, J.-H. Ge, B. Ai
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Iterative companding transform and filtering for reducing PAPR of OFDM signal
IEEE Transactions on Consumer Electronics, 2015In this paper, an efficient Iterative Companding Transform and Filtering (ICTF) technique is proposed for reducing the Peak-to-Average Power Ratio (PAPR) of Orthogonal Frequency Division Multiplexing (OFDM) signal. By means of a specially designed iterative procedure, ICTF is able to obtain both an improved Bit Error Rate (BER) and minimized Out-of ...
Yong Wang, Chao Yang, Bo Ai
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A novel quadrilateral companding transform for PAPR reduction in OFDM systems
Digital Signal Processing, 2019Abstract One of the major limitations of Orthogonal Frequency Division Multiplexing (OFDM) signal is high Peak-to-Average-Power-Ratio (PAPR). Non-linear companding transforms that expand small signals and compress the peak signals reduce the PAPR significantly.
Ashish Goel +2 more
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Nonlinear companding transform for PAPR reduction of OTFS signals
Journal of Optical Communications, 2022Abstract Peak-to-Average Power Ratio (PAPR) is one of the major limitations of an Orthogonal time frequency space (OTFS) signals. To reduce the PAPR, a simple non-linear companding transform is proposed in this paper. The proposed companding transform mainly compresses the large amplitudes and slightly enhances the small amplitudes such ...
Hanumantharao Bitra +2 more
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An adaptive companding transform for OFDM systems
Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication (IEEE Cat. No.04EX710), 2004A novel adaptive companding transform scheme is proposed to efficaciously reduce the peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) signals. The feasible adaptive companding algorithm is proposed and discussed too.
null Gang Yang +2 more
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Bit-Error-Rate Performance of Companding Transforms for OFDM
IEEE Transactions on Vehicular Technology, 2013This paper provides a comprehensive analytical framework to assess the relative bit-error-rate (BER) performance of companding transforms (CTs) employed to reduce the peak-to-average-power ratio (PAPR) in orthogonal frequency-division multiplexing (OFDM) systems.
Yasir Rahmatallah +2 more
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Companding transformation display for 12 bit image data
Optics and Precision Engineering, 2011Based on the digital communication companding transformation principle,a 16-polygonal line geometric partition method which maps 12-bit image data to 8-bit data was proposed to display 12-bit image information on a 8-bit gray scale monitor.The formulas for calculating the linear and nonlinear quantization Signal to Noise Ratio(SNRs) were derived.By ...
范赐恩 FAN Ci-en +4 more
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PAPR Reduction in OFDM Systems via Nonlinear Companding Transform
2012 8th International Conference on Wireless Communications, Networking and Mobile Computing, 2012Companding transform technique is commonly used to reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. This paper proposes a novel nonlinear companding transform method. By transforming original signals into a specified distribution while remaining a constant average output power level, this ...
Y. Wang, L.-H. Wang, J.-H. Ge, B. Ai
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PAPR Reduction in LTE Uplink Communications by Airy Companding Transform
2018 9th International Conference on Computing, Communication and Networking Technologies (ICCCNT), 2018Long Term Evolution uses Single Carrier Frequency Division Multiple Access (SC-FDMA) for uplink communications as it has low peak to average power ratio (PAPR). But PAPR is still an issue for higher order modulations in localized SC-FDMA systems. Companding is an attractive technique to reduce PAPR.
K. Shri Ramtej, S. Anuradha
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High-Rate Design of Transform Coders with Gaussian Mixture Companders
2006 IEEE International Conference on Acoustics Speed and Signal Processing Proceedings, 2006This paper examines the problem of designing fixed-rate transform coders for sources with arbitrary distributions, under input-weighted squared error distortion measures. As a component of this system, a flexible scalar compander using Gaussian mixtures is proposed.
E.R. Duni, B.D. Rao
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