Results 11 to 20 of about 322 (180)
PALM CLIPPING AND NONLINEAR COMPANDING TECHNIQUES BASED PAPR REDUCTION IN OFDM-DCSK SYSTEM
Journal of Engineering and Sustainable Development, 2021 The main drawback of the Orthogonal Frequency Division Multiplexing (OFDM) with Differential Chaos Shift Keying (DCSK) that is named (OFDM-DCSK) is the high Peak to Average Power Ratio (PAPR).
Sajjad R. Abdulridha, Fadhil S. Hasan
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Low-Voltage CMOS Log-Companding Techniques for Audio Applications [PDF]
Analog Integrated Circuits and Signal Processing, 2004 This paper presents a collection of novel current-mode circuit techniques for the integration of very low-voltage (down to 1 V) low-power (few hundreds of μA) complete SoCs in CMOS technologies. The new design proposal is based on both, the Log Companding theory and the MOSFET operating in subthreshold.
Serra Graells, Francesc +2 more
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Reduction of PAPR in OTFS using rooting companding techniques
International Journal of Electronics Letters, 2022 Peak-to-average power ratio (PAPR) is one of the major limitations of an orthogonal time frequency space (OTFS) system. To reduce the PAPR, this paper proposes three companding techniques, namely, logarithmic rooting companding, rooting companding, and ...
Hanumantharao Bitra +2 more
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On the selection of the best companding technique for PAPR reduction in OFDM systems [PDF]
Journal of Information and Telecommunication, 2019 Orthogonal frequency division multiplexing (OFDM) is used in high data rate applications due to its ability to cope with frequency-selective channels. However, OFDM suffers from the high peak-to-average power ratio (PAPR) problem, which reduces the power
Mohamed Mounir, Mohamed Bakry El_Mashade
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Reversible Data Hiding for DICOM Image Using Lifting and Companding
Cryptography, 2019 In this work, a reversible watermarking technique is proposed for DICOM (Digital Imaging and Communications in Medicine) image that offers high embedding capacity (payload), security and fidelity of the watermarked image.
Amit Phadikar +2 more
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On the performance of companding techniques for DMT optical links
Optics Communications, 2022 Abstract In this paper the performance of Discrete Multi-Tone (DMT) optical links using nonlinear companding schemes for peak-to-average power ratio (PAPR) reduction is investigated. First, it is developed an analytical expression to evaluate the total distortion at the demodulation stage introduced by the expansion process, and also to estimate the ...
G. Zoireff +2 more
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Root-Based Nonlinear Companding Technique for Reducing PAPR of Precoded OFDM Signals [PDF]
IEEE Access, 2018 Orthogonal frequency division multiplexing (OFDM) signals are characteristically independent and identically distributed Gaussian random variables that follow Rayleigh distribution. The signals also exhibit high peak-to-average power ratio (PAPR) problem
Kelvin Anoh +3 more
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Performance Analysis of the Two-Piecewise Linear Companding Technique on Filtered-OFDM Systems [PDF]
IEEE Access, 2021 Filtered orthogonal frequency division multiplexing (F-OFDM) is one of the most prominent waveform candidates when it comes to fifth-generation (5G) wireless communication and beyond.
Mishal Al-Gharabally +2 more
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A HYBRID TECHNIQUE FOR PAPR REDUCTION OF OFDM USING DHT PRECODING WITH PIECEWISE LINEAR COMPANDING [PDF]
ICTACT Journal on Communication Technology, 2016 Orthogonal Frequency Division Multiplexing (OFDM) is a fascinating approach for wireless communication applications which require huge amount of data rates.
Thammana Ajay, K. Murali Krishna
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Companding technique for PAPR reduction in OFDM systems based on an exponential function
GLOBECOM '05. IEEE Global Telecommunications Conference, 2005., 2005 In this paper, a new non-linear companding technique, called "exponential companding", is proposed to reduce the high peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. Unlike the mu-law companding scheme, which enlarges only small signals so that increases the average power, the schemes based on ...
Tao Jiang 0001 +2 more
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