Results 91 to 100 of about 4,109,115 (314)

Flexible digital modulation and coding synthesis for satellite communications [PDF]

open access: yes
An architecture and a hardware prototype of a flexible trellis modem/codec (FTMC) transmitter are presented. The theory of operation is built upon a pragmatic approach to trellis-coded modulation that emphasizes power and spectral efficiency.
Budinger, James   +3 more
core   +1 more source

SIMULASI SISTEM MODULASI DIGITAL DENGAN DSK TMS320C6713 [PDF]

open access: yes, 2011
The continued development of communication systems, particularly in the field of digital modulation requires the practitioners (students) who explore the field of telecommunications to understand more clearly the digital modulation.
LAZEARDY, AHMAD BAHTIAR   +2 more
core  

Digital Signal Modulation Classification With Data Augmentation Using Generative Adversarial Nets in Cognitive Radio Networks

open access: yesIEEE Access, 2018
Automated modulation classification plays a very important part in cognitive radio networks. Deep learning is also a powerful tool that we could not overlook its potential in addressing signal modulation recognition problem.
Bin Tang, Ya Tu, Zhaoyue Zhang, Yun Lin
semanticscholar   +1 more source

Organic Electrochemical Transistor Channel Materials: Copolymerization Versus Physical Mixing of Glycolated and Alkoxylated Polymers

open access: yesAdvanced Functional Materials, EarlyView.
This work discusses the use of blended channel materials in OECTs. It explores how mixing glycolated and alkoxylated polymers in various ratios offers a simpler and more efficient route to tuning OECT properties. The performance of the polymer blends is compared to the corresponding copolymers, demonstrating similar OECT characteristics, swelling ...
Lize Bynens   +14 more
wiley   +1 more source

An Overview of Satellite Link Budget Sensitivity Based on Digital Modulation Schemes in Multi-Orbit Satellite Networks

open access: yesApplied Sciences
With the rapid development of multi-orbit satellite networks, efficient and reliable communication systems have become essential for ensuring the link connectivity.
Denis Stanescu, Alexandra Buzducea
doaj   +1 more source

Ideal Molecular Sieving with a Dense MOF for Helium Upgrading with Highly Diffusion Selective Mixed Matrix Membranes

open access: yesAdvanced Functional Materials, EarlyView.
The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal   +10 more
wiley   +1 more source

Bit-error rate performance analysis of spectrum based detector for FSK digital modulation [PDF]

open access: yes, 2003
FSK is widely used digital modulation technique due to its simplicity in implementation using noncoherent detection. Further availability of digital signal processing algorithms such as the FFT (Fast Fourier Transform) and necessary supporting technology
Sha'ameri, Ahmad Zuri
core  

Ferrocene Derivatives Enable Ultrasensitive Perovskite Photodetectors with Enhanced Reverse Bias Stability

open access: yesAdvanced Functional Materials, EarlyView.
Novel ferrocene derivatives (e.g., FcPhc2) are used as an ultrathin layer hole‐blocking layer, reducing hole injection from the Ag contact. This results in an ultralow noise spectral density of 1.2 × 10−14 A Hz−1/2, and a high specific detectivity of 8.1 × 1012 Jones at −0.5 V.
Eunyoung Hong   +16 more
wiley   +1 more source

A Novel Four-Dimensional Modulation Format Based on Subset Selection

open access: yesIEEE Access, 2019
Coherent optical transmission systems have a four-dimensional (4-D) signal space (two quadratures in two polarizations), which can be used to create 4-D modulation formats that have better sensitivity than traditional two-dimensional modulation signal ...
Guijun Hu, Zhaoxi Li
doaj   +1 more source

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