Results 91 to 100 of about 9,227 (221)
New SLM scheme to reduce the PAPR of OFDM signals using a genetic algorithm
ICT Express, 2016 Selected mapping (SLM) is a popular peak-to-average power ratio (PAPR) reduction technique suitable for use in orthogonal frequency division multiplexing (OFDM) systems as it achieves good PAPR reduction performance without signal distortion.
Insoo Sohn
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International Journal of Computer Applications, 2016 In this paper various Hybrid techniques of keying and coding algorithm have been implemented to efficiently reduce the peak-to-average-power ratio (PAPR) problem that exists in MIMO-OFDM. A novel Selective Level Method (SLM) method is used as a basic technique which has been combined with other keying and transform techniques. Square root technique and
Shabir Ahmad +4 more
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Al-Khawarizmi Engineering Journal, 2019 One of the serious problems in any wireless communication system using multi carrier modulation technique like Orthogonal Frequency Division Multiplexing (OFDM) is its Peak to Average Power Ratio (PAPR).It limits the transmission power due to the ...
Ahmed K. Hassan
doaj
Al-Khawarizmi Engineering Journal, 2008 One of the serious problems in any wireless communication system using multi carrier modulation technique like Orthogonal Frequency Division Multiplexing (OFDM) is its Peak to Average Power Ratio (PAPR).It limits the transmission power due to the ...
Ahmed K. Hassan
doaj
A mathematical PAPR estimation of OTFS network using a machine learning SVM algorithm
Results in OpticsThe article presents a Support Vector Machine (SVM) algorithm to lower the peak-to-average power ratio (PAPR) in networks that work in orthogonal time frequency space (OTFS). High PAPR makes power amplifiers less efficient and lowers signal quality. This
Arun Kumar +2 more
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A PAPR Reduction Method With EVM Constraints for OFDM Systems
IEEE Access, 2019 In orthogonal frequency division multiplexing (OFDM) systems, high peak to average power ratio (PAPR) is one of its core issues. The OFDM signal with high PAPR passes high-power amplifier (HPA) will result in severely nonlinear distortions, which not ...
Yajun Wang, Mengmeng Wang, Zhibin Xie
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Square Complex Orthogonal Designs with Low PAPR and Signaling Complexity
, 2008 Space-Time Block Codes from square complex orthogonal designs (SCOD) have been extensively studied and most of the existing SCODs contain large number of zero.
Das, Smarajit, Rajan, B. Sundar
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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
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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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