Results 1 to 10 of about 2,226 (173)

Energy Harvesting for TDS-OFDM in NOMA-Based Underwater Communication Systems [PDF]

open access: yesSensors, 2022
Non-orthogonal multiple access (NOMA) is considered a promising multiple access technique for fifth generation (5G) mobile networks and tactical internet due to its high spectral efficiency.
Hamada Esmaiel, Haixin Sun
doaj   +2 more sources

Convolutional Code Based PAPR Reduction Scheme for Multicarrier Transmission with Higher Number of Subcarriers [PDF]

open access: yesMehran University Research Journal of Engineering and Technology, 2017
Multicarrier transmission technique has become a prominent transmission technique in high-speed wireless communication systems. It is due to its frequency diversity,small inter-symbol interference in the multipath fading channel, simple equalizer ...
SAJJAD ALIMEMON   +2 more
doaj   +1 more source

Design of an Integrated System for Spaceborne SAR Imaging and Data Transmission [PDF]

open access: yesSensors
In response to the conflicting demands between real-time satellite communication and high-resolution synthetic aperture radar (SAR) imaging, we propose a method that aligns the data transmission rate with the imaging data volume.
Qixing Wang   +3 more
doaj   +2 more sources

A Simplified Scheme of Estimation and Cancellation of Companding Noise for Companded Multicarrier Transmission Systems [PDF]

open access: yesRadioengineering, 2015
Nonlinear companding transform is an efficient method to reduce the high peak-to-average power ratio (PAPR) of multicarrier transmission systems. However, the introduced companding noise greatly degrades the bit-error-rate (BER) performance of the ...
S. Peng   +4 more
doaj   +1 more source

Dual-Carrier-Paired Point-to-Multipoint Transmission Over ROADM Systems: Frequency-Polarization Coding and Frequency Collaborative Control

open access: yesIEEE Photonics Journal, 2022
In dual-carrier (DC)-paired fiber optic long-reach transmission, which extends a point-to-multipoint coherent system to a cascaded reconfigurable optical add-drop multiplexing (ROADM) system, a narrow passband causes severe performance degradation of the
Takahiro Kodama, Ryosuke Matsumoto
doaj   +1 more source

BER and PSD Improvement of FBMC with Higher Order QAM Using Hermite Filter for 5G Wireless Communication and beyond

open access: yesJournal of Electrical and Computer Engineering, 2023
Nowadays, multicarrier modulation schemes are being widely used in wireless communication system than single-carrier modulation techniques. Single-carrier modulation schemes are less capable of dealing with multipath fading channels than multicarrier ...
Hise Teferi Dumari   +3 more
doaj   +1 more source

Highly focussed beampattern synthesis in FDA‐MIMO radar with multicarrier transmission

open access: yesIET Radar, Sonar & Navigation, 2023
Multicarrier technology is widely used for improving the performance of beampattern synthesis in frequency diverse array multiple‐input and multiple‐output (FDA‐MIMO) Radar.
Langhuan Geng   +4 more
doaj   +1 more source

Effects of Carrier Frequency Offset, Timing Offset, and Channel Spread Factor on the Performance of Hexagonal Multicarrier Modulation Systems

open access: yesEURASIP Journal on Wireless Communications and Networking, 2009
Hexagonal multicarrier modulation (HMM) system is the technique of choice to overcome the impact of time-frequency dispersive transmission channel. This paper examines the effects of insufficient synchronization (carrier frequency offset, timing offset ...
Xu Kui, Shen Yuehong
doaj   +2 more sources

Discrete Fourier Transform-Based Block Faster-Than- Nyquist Transmission for 5G Wireless Communications

open access: yesApplied Sciences, 2020
Faster-than-Nyquist (FTN) signaling is regarded as a potential candidate for improving data rate and spectral efficiency of 5G new radio (NR). However, complex detectors have to be utilized to eliminate the inter symbol interference (ISI) introduced by ...
Yaqiu Peng, Mingqi Li
doaj   +1 more source

Low-complexity LSMR equalisation of FrFT-based multicarrier systems in doubly dispersive channels [PDF]

open access: yes, 2011
The discrete fractional Fourier transform (FrFT) has been suggested to enhance performance over DFT-based multicarrier systems when transmitting over doubly-dispersive channels.
Weiss, Stephan   +7 more
core   +1 more source

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