Results 101 to 110 of about 9,490 (213)

A NEW DISCRETE HARTLEY TRANSFORM PRECODING BASED INTERLEAVED-OFDMA UPLINK SYSTEM WITH REDUCED PAPR FOR 4G CELLULAR NETWORKS [PDF]

, 2011
High peak-to-average power ratio (PAPR) reduction is one of the major challenges in orthogonal frequency division multiple access (OFDMA) systems since last decades. High PAPR increases the complexity of analogue-to-digital (A/D) and digital-to-analogue (
IMRAN BAIG, VARUN JEOTI
core  

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  

Widely Linear Selective Mapping (SLM) Scheme for Minimization of Peak-to-Average Power Ratio (PAPR) in OFDM System

International Journal of Advance Research and Innovation
Orthogonal Frequency Division Multiplexing (OFDM) is a promising modulation technique widely used in modern wireless communication systems due to its robustness against multipath fading and high spectral efficiency. However, a major drawback of OFDM is its high Peak-toAverage Power Ratio (PAPR), which leads to nonlinear distortion when passing through ...
Velagandhula Suchithra, Kusuma Chandhu, Barthupaka Praveen, Sripathi Shivani, Bommana Ranjith   +4 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 MANAGEMENT
OFDM 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
openaire   +1 more source

Constellation Compaction Design to Reduce Both PAPR and Average Power in OFDM Systems

EURASIP Journal on Wireless Communications and Networking, 2010
This paper proposes a novel way to compact the constellation points in QAM modulation schemes and exploits this compaction to reduce the peak to average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems.
Al-Shaikhi Ali
doaj  

Peak to Average Power Ratio (PAPR) Reduction Technique in Orthogonal Frequency Division Multiplexing (OFDM) Using Block Coding

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).
openaire   +1 more source

Simulation and comparative study for peak to average power ratio (PAPR) reduction techniques in OFDM for wireless communications

, 2020
Orthogonal Frequency Division Multiplexing (OFDM) is an effective method for transmission data with high speed rate. OFDM system uses orthogonal subcarrier to transfer data which make this system more efficient than multi carrier system, by exploit all the carrier frequency band.
openaire   +1 more source

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, Duvanaud, Claude, Koussa, Badreddin, Perrine, Clency, Vauzelle, Rodolphe   +4 more
core   +1 more source

Deep Learning Integration in PAPR Reduction in 5G Filter Bank Multicarrier Systems [PDF]

Iranian Journal of Electrical and Electronic Engineering
High peak-to-average power ratio (PAPR) has been a major drawback of Filter bank Multicarrier (FBMC) in the 5G system. This research aims to calculate the PAPR reduction associated with the FBMC system.
Mohamed Hussien Moharam, AYA W. wafik
doaj  

Companding transform technique combined with iterative filtering for reducing PAPR of OFDM signals

Tongxin xuebao, 2015
Considering the drawbacks of the traditional companding transforms，an efficient companding scheme combined with iterative filtering was proposed to reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals.
Chao YANG, Yong WANG, Jian-hua GE
doaj