Results 111 to 120 of about 25,708 (247)
Journal of Applied Engineering & Technology (JAET), 2019 Orthogonal Frequency Division Multiplexing (OFDM) signal is considered a good candidate for wireless systems because it offers diversity gain in frequency selective channels. As in other multicarrier schemes, however, OFDM suffers from high peak to average power ratio (PAPR).
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TRELLIS CODED MAPPING FOR PEAK TO AVERAGE POWER REDUCTION IN SFBC MIMO OFDM SYSTEMS
ICTACT Journal on Communication Technology, 2016 Space frequency block code orthogonal frequency division multiplexing (SFBC-OFDM) systems has inherit drawbacks of high peak-to average power ratio (PAPR) signals, and constellation shaping with trellis is a promising approach for reducing both peak ...
P. N. Kota, A. N. Gaikwad, B. P. Patil
doaj
A Practical Algorithm for Physical Layer Encryption Under Constant Envelope Constraint
IEEE AccessPhysical Layer Encryption (PLE) techniques have gained increasing attention recently as they ensure security without requiring heavy coordination or time-consuming secret key establishment.
Clement Leroy +3 more
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Peak To Average Power Ratio (PAPR) Reduction Technique Using Selective Mapping in OFDM System
INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENTOFDM is an excellent, interference-free multicarrier modulation technique that is very efficient with the available spectrum. When practical power amplifiers are employed at the transmitter, the high peak to average power ratio (PAPR) of OFDM systems causes power inefficiency and signal distortion, which is a significant disadvantage. A distortion-free
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Peak-to-Average Power Ratio analysis in MIMO systems [PDF]
, 2006 International audienceIn this paper, we analyze the Peak-to-Average Power Ratio (PAPR) in Multiple Input Multiple Output (MIMO) systems based on Alamouti diversity scheme. This analysis is at both transmitter and re- ceiver sides with channel influences.
Louët, Yves, Rihawi, Basel
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Tongxin xuebao, 2023 To solve the problem of limited number of sequences in the mutually orthogonal complementary code set and high peak-to-average power ratio (PAPR) in MC-CDMA system, a construction of asymptotically optimal a periodic binary QCSS with low column vector ...
Yubo LI +3 more
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PERFORMANCE IMPROVEMENT OF OFDM SYSTEM BY PEAK TO AVERAGE POWER REDUCTION THROUGH PULSE SHAPING TECHNIQUE [PDF]
ICTACT Journal on Communication Technology, 2010 OFDM is a form of multicarrier modulation technique with high spectral efficiency, robustness to channel fading, immunity to impulse interference, uniform average spectral density capacity of handling very strong echoes and non-linear distortion. Despite
Susmita Das +2 more
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A Comparison of Several Gradient Based Optimization Algorithms for PAPR Reduction in OFDM Systems
, 2012 International audienceThe aim of this paper is to evaluate and compare different optimization algorithms for Peak to Average Power Ratio (PAPR) reduction in Orthogonal Frequency Division Multiplexing (OFDM) systems. Based on Tone Reservation (TR) method,
Bachir, Smail +4 more
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A Novel Approach to Deducing of the Data- PAPR Relation for OFDM System
Journal of Engineering and Sustainable Development, 2012 Orthogonal Frequency Division Multiplexing (OFDM) is a very attractive technique for high-data-rate transmission in wireless and wired applications. The main drawback of the OFDM technique is its high peak to average power ratio (PAPR).
Dhafer R. Zaghar, Tahreer Sh. Mahmoud
doaj
L'optimalité de l'OFDM en termes de performance en PAPR [PDF]
, 2015 National audienceLes systèmes multi-porteuses, et en particulier leur structure de modulation, connaissent un intérêt croissant. Suivant la forme d'onde considérée, plusieurs mesures de performance peuvent changer comme le PAPR (Peak-to-Average Power ...
Chafii, Marwa +2 more
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