Results 21 to 30 of about 88,236,480 (283)

Hybrid Peak-to-Average Power Ratio Reduction Techniques: Review and Performance Comparison

open access: yesIEEE Access, 2017
Orthogonal frequency division multiplexing (OFDM) is an efficient multi-carrier modulation technique for wireless communication. However, one of the main drawbacks encountered in implementing it is its resultant high peak-to-average power ratio (PAPR ...
Francisco Sandoval   +2 more
doaj   +1 more source

Time Reduction for SLM OFDM PAPR Based on Adaptive Genetic Algorithm in 5G IoT Networks

open access: yesSensors, 2023
In this paper, a new peak average power and time reduction (PAPTR) based on the adaptive genetic algorithm (AGA) strategy is used in order to improve both the time reduction and PAPR value reduction for the SLM OFDM and the conventional genetic algorithm
Esam A. A. Hagras   +4 more
doaj   +1 more source

A Novel Clipping-Based Method to Reduce Peak-To-Average Power Ratio of OFDM Signals

open access: yesInformation, 2020
Orthogonal frequency division multiplexing (OFDM) is a widely used technology for wireless broadband communications. However, it also suffers from some drawbacks.
Bo Tang   +3 more
doaj   +1 more source

A Closed Form Selected Mapping Algorithm for PAPR Reduction in OFDM Multicarrier Transmission

open access: yesEnergies, 2022
Nowadays, the demand for communication multi-carriers’ channels, where the sub-channels are made mutually independent by using orthogonal frequency division multiplexing (OFDM), is widespread both for wireless and wired communication systems.
Sara Carcangiu   +2 more
doaj   +1 more source

Multi-Carrier Waveform Design for Directional Modulation Under Peak to Average Power Ratio Constraint

open access: yesIEEE Access, 2019
Multi-carrier-based waveform design for directional modulation (DM) is studied, where simultaneous data transmission over multiple frequencies can be achieved, with given phase distribution at the main lobe and as random as possible over sidelobe regions
Bo Zhang, Wei Liu, Qiang Li
doaj   +1 more source

A peak-to-average power ratio reduction method for mixed-numerology multi-carrier systems

open access: yesDianxin kexue, 2023
In order to support diverse service demands of communication scenarios, 5G adopts the mixed-numerology system based on orthogonal frequency division multiplexing (OFDM).The mixed-numerology systems still have the problem of high peak-to-average power ...
Nan SHI   +4 more
doaj   +2 more sources

Two-Stage Companding Scheme to Reduce Peak-to-Average Power Ratio for Safety Transportation Scenarios

open access: yesIEEE 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
doaj   +1 more source

Spreading Code Design for a MC-CDMA Based GNSS Pilot Signal [PDF]

open access: yes, 2010
MC-CDMA can represent an alternative to classical DS-CDMA for the design of GNSS ranging signals. A first requirement MC-CDMA signals must fulfill is that their generation on a satellite payload be feasible.
Meurer, Michael   +7 more
core   +1 more source

Partial Transmit Sequences for Peak-to-Average Power Ratio Reduction in Multiantenna OFDM

open access: yesEURASIP Journal on Wireless Communications and Networking, 2007
The major drawback of orthogonal frequency-division multiplexing (OFDM) is its high peak-to-average power ratio (PAR), which gets even more substantial if a transmitter with multiple antennas is considered.
Christian Siegl, Robert F. H. Fischer
doaj   +1 more source

Investment of Cyclic Prefix to Reduce the Peak-to-Average Power Ratio and Recover Original Phases Blindly

open access: yesJournal of Communications Software and Systems, 2022
When dealing with the phenomenon of unexpected high peak-to-average power ratio (PAPR) caused by multicarrer techniques, it is rarely to find a proposed solution that addresses the most important challenges together, that are; reducing the PAPR ...
Mohammed I. Al-Rayif
doaj   +1 more source

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