Results 1 to 10 of about 66,312 (263)

Space-Time Multiple-Mode Orthogonal Frequency Division Multiplexing With Index Modulation

IEEE Access, 2017
Multiple-mode orthogonal frequency division multiplexing with index modulation (MM-OFDM-IM) improves the spectral efficiency of the conventional OFDM-IM scheme by considering multiple distinguishable constellations for signal modulation.
Jun Li, Miaowen Wen, Xueqin Jiang, Wei Duan   +3 more
doaj   +3 more sources

Orthogonal Frequency Division Multiplexing Techniques Comparison for Underwater Optical Wireless Communication Systems. [PDF]

Sensors (Basel), 2019
Optical wireless communication is an energy-efficient and cost-effective solution for high-speed and highly-secure wireless connections. In this paper, we compare, discuss, and analyze three popular optical orthogonal frequency division multiplexing ...
Lian J, Gao Y, Wu P, Lian D.
europepmc   +2 more sources

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, Qiao Y, Yang Z, Cheng Q, Wang Q, Guo M, Tang X.   +6 more
europepmc   +3 more sources

Square-Wave Spatial Optical Orthogonal Frequency-Division Multiplexing [PDF]

IEEE Photonics Journal
Visible light communication (VLC) systems leverage illumination devices, such as light-emitting diodes (LEDs), to serve a dual role as indoor high-speed communication downlinks.
Mohammed S. A. Mossaad, Kaichen Su, Warren Pawlikowski, Zhenyu Charlus Zhang, Steve Hranilovic, Lutz Lampe   +5 more
doaj   +2 more sources

Eigenvalue-Decomposition-Precoded Ultra-Dense Non-Orthogonal Frequency-Division Multiplexing [PDF]

IEEE Transactions on Wireless Communications, 2020
This paper proposes a novel ultra-dense non-orthogonal frequency-division multiplexing (NOFDM) transmission, where subcarrier spacing is set significantly lower than that of orthogonal frequency-division multiplexing (OFDM).
Seichiroh Osaki, Takumi Ishihara, Shinya Sugiura   +2 more
openalex   +2 more sources

Conditional generative adversarial network technology for OFDM system receiver signal detection. [PDF]

PLoS ONE
In response to the limited detection accuracy of traditional orthogonal frequency division multiplexing systems in complex wireless channel environments, this study first uses conditional generative adversarial networks to construct a single input/output
Yang Liu, Peng Liu, Yu Shi, Xue Hao
doaj   +2 more sources

A Novel Space–Time Coding Echo Separation Scheme with Orthogonal Frequency Division Multiplexing Chirp Waveforms for Multi-Input Multi-Output Synthetic Aperture Radar [PDF]

Sensors (Basel)
Kai Yao, Chang Liu
openalex   +2 more sources

Orthogonal Frequency Division Diversity and Multiplexing for 6G OWC: Principle and Underwater Use Case [PDF]

Photonics
In this paper, we, for the first time, propose and demonstrate an orthogonal frequency division diversity and multiplexing (OFDDM) scheme for the sixth-generation (6G) underwater optical wireless communication (UOWC) systems.
Jiamin Chen, Chen Chen, Zhihong Zeng, Min Liu, Jia Ye, Cuiwei He, Shenjie Huang, H. Y. Fu, Harald Haas   +8 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

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, A. Hajar, Mohamedou Abewa   +2 more
semanticscholar   +1 more source