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Performance Comparison of Companding-Based PAPR Suppression Techniques in OFDM Systems
2019 8th International Conference on Modern Circuits and Systems Technologies (MOCAST), 2019The suppression of high peak-to-average-power-ratio (PAPR) values is crucial to the performance of orthogonal frequency division multiplexing (OFDM) systems. High PAPR gives rise to the non-linear clipping-induced harmonic distortions which degrade the end-to-end bit error rate performance.
Abdulwahid Mohammed +3 more
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Adaptive slope and threshold companding technique for PAPR reduction in OFDM systems
2012 19th IEEE International Conference on Electronics, Circuits, and Systems (ICECS 2012), 2012High Peak to Average Power Ratio (PAPR) of transmitted signals is a major drawback for multi-carrier modulation systems such as orthogonal frequency division multiplexing (OFDM) systems. Companding technique has been recently used to reduce PAPR. In this work, an adaptive slope and threshold (AST) companding transform is proposed to increase the ...
Vivek Yenamandra +4 more
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Integer DCT-based reversible watermarking for images using companding technique
SPIE Proceedings, 2004We present a high capacity reversible watermarking scheme using companding technique over integer DCT coefficients of image blocks. This scheme takes advantage of integer DCT coefficients' Laplacian-shape-like distribution, which permits low distortion between the watermarked image and the original one caused by the bit-shift operations of the ...
Bian Yang +4 more
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Lossless Data Hiding Based on Companding Technique and Difference Expansion of Triplets
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2007A reversible data hiding scheme based on the companding technique and the difference expansion (DE) of triplets is proposed in this paper. The companding technique is employed to increase the number of the expandable triplets. The capacity consumed by the location map recording the expanded positions is largely decreased.
ShaoWei Weng +2 more
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PAPR Reduction in MIMO-OFDM Based on Polar Codes and Companding Technique
2019 International Conference on Advanced Communication Technologies and Networking (CommNet), 2019MIMO-OFDM is a method adopted by new highspeed communications technologies such as IEEE802.11, IEEE 802.16 and 4G. Among the advantages of MIMO-OFDM, its ability to increase the transmission rate, and its adaptation to multipath channel with fading. Unfortunately the signals modulated by the OFDM technique generate high values of Peak-to-Average Power ...
Brahim Bakkas +2 more
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Companding and Pulse shaping technique for PAPR reduction in FBMC systems
2015 International Conference on Control, Instrumentation, Communication and Computational Technologies (ICCICCT), 2015Multicarrier modulation systems have become a fast growing field in the modern communication field. The most popular multicarrier modulation technique, OFDM has low bandwidth efficiency due to the insertion of cyclic prefix and poor spectral containment and high narrow band interference due to the use of IFFT.
Neenu Raju, Sakuntala S. Pillai
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Implementation of Non Linear Companding Technique for Reducing PAPR of OFDM
Materials Today: Proceedings, 2018Abstract High Peak-to-Average Power Ratio (PAPR) of transmitted signal is one of the foremost problems to implement Orthogonal Frequency Division Multiplexing (OFDM) System. To transform the OFDM signal into anticipated statistics form that are identified by a linear piecewise function, the new Non-Linear Companding transform (NCT) set of rules is ...
D. Madhavi, M. Ramesh Patnaik
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Generalized Trapezoidal Companding Technique for PAPR Reduction in OFDM Systems
Journal of Optical Communications, 2018AbstractThe main drawback in the performance of the Orthogonal Frequency Division Multiplexing (OFDM) system is the higher Peak-to-Average Power Ratio (PAPR) of the OFDM signals at the transmitter side. Companding is a well-known technique useful for reducing PAPR in the OFDM signal. This paper proposes a new nonlinear companding scheme that transforms
Saruti Gupta, Ashish Goel
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A hybrid companding transform technique for PAPR reduction of OFDM signals
2015 13th International Conference on Electromagnetic Interference and Compatibility (INCEMIC), 2015Orthogonal Frequency Division Multiplexing (OFDM) is an attractive technique for wireless communication applications. However, an OFDM signal has a large Peak-to-Average Power Ratio (PAPR), which can result in significant distortion when passed through a nonlinear device, such as a transmitter power amplifier. Number of techniques has been proposed for
D. Durga Prasad, M. V. Nageswara Rao
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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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