Results 11 to 20 of about 3,552 (166)

Generalized Filter Bank Orthogonal Frequency Division Multiplexing: Low-Complexity Waveform for Ultra-Wide Bandwidth and Flexible Services [PDF]

Entropy
Terahertz (THz) communication is a crucial technique in sixth generation (6G) mobile networks, which allow for ultra-wide bandwidths to enable ultra-high data rate wireless communication.
Yu Xin, Jian Hua, Tong Bao, Yaxing Hao, Ziheng Xiao, Xin Nie, Fanggang Wang   +6 more
doaj   +2 more sources

A Survey on Physical Layer Techniques and Challenges in Underwater Communication Systems

Journal of Marine Science and Engineering, 2023
In the past decades, researchers/scientists have paid attention to the physical layer of underwater communications (UWCs) due to a variety of scientific, military, and civil tasks completed beneath water.
Naveed Ur Rehman Junejo, Mariyam Sattar, Saifullah Adnan, Haixin Sun, Abuzar B. M. Adam, Ahmad Hassan, Hamada Esmaiel   +6 more
doaj   +1 more source

ADAPTIVE CYCLIC PREFIX LENGTH FOR CONVOLUITIONAL CODE OFDM SYSTEM IN FREQUENCY SELECTIVE CHANNEL

Journal of Engineering, 2023
Orthogonal Frequency Division Multiplexing (OFDM) is one of recent years multicarrier modulation used in order to combat the Inter Symbol Interference (ISI) introduced by frequency selective mobile radio channel.
Ashwaq A. Abed Aljanaby, Malathe Salah AL -Deen Salah AL -Deen   +1 more
doaj   +1 more source

Analysis of Doppler and Multipath on Orthogonal Chirp Division Multiplexing in Shallow Water Acoustic Channel

IEEE Access, 2022
In the scenario of underwater acoustic communication, Orthogonal Frequency Division Multiplexing (OFDM) is widely used for its high spectral efficiency and high transmission rate.
Bai Yiqi, He Chuanlin
doaj   +1 more source

Orthogonal Frequency Division Multiplexing (OFDM) Development and Teaching Platform [PDF]

2011 ASEE Annual Conference & Exposition Proceedings, 2020
Orthogonal Frequency Division Multiplexing (OFDM) Development and Teaching PlatformThe computer engineering technology program has a very robust course sequence in digital andembedded systems design with a strong emphasis on hands-on experience for the students.
Antonio Francisco Mondragon-Torres, Mahesh Nandan Kommi, Tamoghna Bhattacharya   +2 more
openaire   +2 more sources

FDSS-Based DFT-s-OFDM for 6G Wireless Sensing

Sensors, 2023
Integrated sensing and communications (ISAC) is emerging as a key technology of 6G. Owing to the low peak-to-average power ratio (PAPR) property, discrete Fourier transform spread orthogonal frequency-division multiplexing (DFT-s-OFDM) is helpful to ...
Lu Chen, Jianxiong Pan, Jing Zhang, Junfeng Cheng, Luyan Xu, Neng Ye   +5 more
doaj   +1 more source

A Novel partial sequence technique based Chaotic biogeography optimization for PAPR reduction in generalized frequency division multiplexing waveform

Heliyon, 2023
For Orthogonal Frequency Division Multiplexing (OFDM) systems, the most significant problem is the peak-to-average power ratio. The utilisation of partial transmission sequence, often known as PTS, is an efficient method for reducing PAPR.
Xingsi Xue, SatheeshKumar Palanisamy, Manikandan A, DhanaSekaran Selvaraj, Osamah Ibrahim Khalaf, Ghaida Muttashar Abdulsahib   +5 more
doaj   +1 more source

Spectrum-Efficient Triple-Layer Hybrid Optical OFDM for IM/DD-Based Optical Wireless Communications

IEEE Access, 2020
In this paper, a triple-layer hybrid optical orthogonal frequency division multiplexing (THO-OFDM) for intensity modulation with direct detection (IM/DD) systems with a high spectral efficiency is proposed.
Tian Zhang, Han Ji, Zabih Ghassemlooy, Xuan Tang, Bangjiang Lin, Shuang Qiao   +5 more
doaj   +1 more source

Time-and-Frequency Hybrid Multiplexing for Flexible Ambiguity Controls of DFT-coded MIMO OFDM Radar

IEEE Access, 2021
A time-and-frequency hybrid multiplexing technique for a multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) radar is proposed. Discrete Fourier transform (DFT)-coded OFDM waveforms are introduced, which allow it to be
Junseuk Suh, Jungah Lee, Gye-Tae Gil, Songcheol Hong   +3 more
doaj   +1 more source

Comparison of traffic performance of QPSK and 16-QAM modulation techniques for OFDM system

Journal of Telecommunications and Information Technology, 2005
Orthogonal frequency division multiplexing (OFDM) provides better spectral efficiency than frequency division multiplexing (FDM), while maintaining orthogonal relation between carriers; hence traffic is better carried by OFDM than FDM within the same ...
Imdadul Islam, Siddique Hossain
doaj   +1 more source