Results 51 to 60 of about 241 (175)
A Low-Complexity Hybrid DCT and Companding-Based PAPR Reduction Technique for AFDM Systems
IEEE AccessThe recently proposed multi-chirp-based physical layer waveform, affine frequency division multiplexing (AFDM), has attracted significant attention for enabling efficient and reliable communication over doubly dispersive (DD) channels while maintaining ...
Vundela Madhava Reddy +1 more
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IEEE Access, 2017 Generally, the probability density function (PDF) of orthogonal frequency division multiplexing (OFDM) signal amplitudes follow the Rayleigh distribution, thus, it is difficult to correctly predict the existence of impulsive noise (IN) in powerline ...
Kelvin Anoh +4 more
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An Enhanced Companding Algorithm for Universal Filtered Multi-Carrier System
ETRI JournalThis paper proposes a new companding scheme called three μ-law compand-ing to reduce the peak-to-average power ratio (PAPR) in a universal filtered multicarrier system. The proposed scheme is more flexible and provides better PAPR reduction and bit error
Vijaya Durga Chintala +3 more
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On Optimizing the PAPR of OFDM Signals With Coding, Companding, and MIMO
IEEE Access, 2019 One main disadvantage of the multiple-input-multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) system is that the signals transmitted on each antenna may experience high peak-to-average-power ratio (PAPR). We will present a new hybrid
Francisco Sandoval +2 more
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Nonlinear companding transform for PAPR reduction in lattice-OFDM system
Tongxin xuebao, 2015 Since the inherent higher peak-to-average power ratio (PAPR) in lattice OFDM (LOFDM) is higher than that of conventional OFDM systems, a novel continuous and differentiable nonlinear companding scheme is investigated and analyzed when employing the ...
Si-ming PENG +4 more
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IEEE AccessFor optical communication, the transmitted signal must be real-valued that can be achieved by employing Hermitian symmetry (HS). But the HS results in increased power consumption and decreased spectral efficiency (SE). Therefore, a HS free asymmetrically
Vijaya Durga Chintala +4 more
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Piecewise-linear companding transform for peak-to-average power ratio reduction of OFDM signals
Tongxin xuebao, 2011 In order to reduce the peak-to-average power ratio（PAPR） of orthogonal frequency division multiplexing（OFDM） signals,a piecewise-linear companding transform was proposed.Small amplitudes were multiplied by a scale factor,while large ones were not only ...
YANG Pin-lu, HU Ai-qun
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IEEE Access, 2019 Reliable wireless data transmission in intelligent transportation systems (ITS) has drawn a wide concern in recent years. As an efficient wireless transmission technology, multi-carrier communication (MCM) finds its way in many applications. However, the
Jun Hou +5 more
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ICT ExpressThe filter bank multi-carrier with offset quadrature amplitude modulation (FBMC/OQAM) is extensively utilized in communication scenarios characterized by severe Doppler interference, owing its remarkable ability for precise time–frequency positioning ...
Xinyu Liu +4 more
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Performance Analysis of Hybrid Peak to Average Power Ratio Reduction Techniques in 5G UFMC Systems
IEEE Access, 2019 The universal filtered multi-carrier (UFMC) technique has been proposed as a prominent waveform candidate for fifth generation (5G) communication techniques.
Ali F. Almutairi +2 more
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