Results 21 to 30 of about 140,441 (346)
Capacity limit for faster-than-Nyquist non-orthogonal frequency-division multiplexing signaling. [PDF]
Sci Rep, 2017 Faster-than-Nyquist (FTN) signal achieves higher spectral efficiency and capacity compared to Nyquist signal due to its smaller pulse interval or narrower subcarrier spacing. Shannon limit typically defines the upper-limit capacity of Nyquist signal.
Zhou J +6 more
europepmc +3 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 +6 more
doaj +1 more source
Orthogonal frequency division multiplexing with subcarrier power modulation for doubling the spectral efficiency of 6G and beyond networks [PDF]
Transactions on Emerging Telecommunications Technologies, 2020 With the emergence of new applications (eg, extended reality [XR] and haptics), which require to be simultaneously served not just with low latency and sufficient reliability, but also with high spectral efficiency, future networks (ie, 6G and beyond ...
Jehad M. Hamamreh +2 more
semanticscholar +1 more source
Index modulation for OFDM RadCom systems
The Journal of Engineering, 2021 This paper studies a novel Radar and wireless communication fusion system namely, RadCom, using orthogonal frequency division multiplexing index modulation waveforms.
Gaojian Huang +3 more
doaj +1 more source
Interleaved orthogonal frequency division multiplexing system [PDF]
IEEE International Conference on Acoustics Speech and Signal Processing, 2002 A new orthogonal frequency division multiplexing (OFDM) system for wireless communications over frequency selective fading channels is presented. The proposed interleaved orthogonal frequency division multiplexing (IOFDM) system promises higher code rate as compared to the conventional OFDM system without bandwidth expansion and with very slight ...
Prasad, VGS, Hari, KVS
openaire +5 more sources
Advanced Materials Interfaces, EarlyView., 2023 This review discusses the use of Surface‐Enhanced Raman Spectroscopy (SERS) combined with Artificial Intelligence (AI) for detecting antimicrobial resistance (AMR). Various SERS studies used with AI techniques, including machine learning and deep learning, are analyzed for their advantages and limitations.
Zakarya Al‐Shaebi +4 more
wiley +1 more source
Analysis of GFDM as a robust 5G communication technique in noisy environment [PDF]
, 2020 One of the challenges of modulation techniques used in Fifth-Generation (5G) is their robustness in noisy environment. Conventional Orthogonal Frequency Division Multiplexing (OFDM) cannot be considered as a 5G waveform in its original form because of ...
Ayaz, Ferheen, Ayaz, Saqib
core +1 more source
Spectrum-Efficient Triple-Layer Hybrid Optical OFDM for IM/DD-Based Optical Wireless Communications [PDF]
, 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.
Ghassemlooy, Zabih +5 more
core +2 more sources
Polarized deep diffractive neural network for classification, generation, multiplexing and de-multiplexing of orbital angular momentum modes [PDF]
, 2022 The multiplexing and de-multiplexing of orbital angular momentum (OAM) beams are critical issues in optical communication. Optical diffractive neural networks have been introduced to perform classification, generation, multiplexing and de-multiplexing of OAM beams. However, conventional diffractive neural networks cannot handle OAM modes with a varying
arxiv +1 more source
A REVIEW STUDY ON ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING [PDF]
PARIPEX INDIAN JOURNAL OF RESEARCH, 2021 The advancement in the up-grading of technology and proliferation in data accessibility is changing the economics of digital communication; therefore, this enables the reexamining of the previous design and approach to network architectures. This research paper focused on advancements in technology in the past few years and concentrate on OFDM ...
Vishal Ghode +2 more
openaire +1 more source