Results 71 to 80 of about 4,863,781 (309)

Implementasi dan Evaluasi Kinerja Frequency Hopping Spread Spectrum (FHSS) Menggunakan WARP

Jurnal Teknik ITS, 2015
Proses pengiriman informasi dari pengirim ke penerima terkadang terdapat gangguan, maka untuk mengatasi masalah tersebut dapat menggunakan metode Spred Spectrum, yang merupakan teknik pengiriman sinyal yang tahan terhadap gangguan berupa noise maupun ...
Rini Nurpita Sari, Suwadi Suwadi, Titiek Suryani   +2 more
doaj  

Chirp-Based FHSS Receiver with Recursive Symbol Synchronization for Underwater Acoustic Communication

Sensors, 2018
In this paper, we propose a covert underwater acoustic communication method that is robust to fading using a chirp signal combined with a frequency-hopping spread spectrum scheme.
Geunhyeok Lee, Woongjin Park, Taewoong Kang, Kiman Kim, Wanjin Kim   +4 more
doaj   +1 more source

Securing Physical Layer for FHSS Communication System Using Code andPhase Hopping Techniques in CDMA, System Design and Implementation

Journal of Engineering, 2020
The Frequency-hopping Spread Spectrum (FHSS) systems and techniques are using in military and civilianradar recently and in the communication system for securing the information on wireless communications link channels, for example in the Wi-Fi 8.02.X ...
Saifuldeen A. Mohammed
doaj   +1 more source

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

Advanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

Slow Frequency-Hopping Multicarrier DS-CDMA for Transmission over Nakagami Multipath Fading Channels

, 2001
A novel multiple access scheme based on slow frequency hopping multicarrier direct-sequence code division multiple access (SFH/MC DS-CDMA) is proposed and investigated, which can be rendered compatible with the existing second-generation narrowband CDMA ...
Yang, L-L., Hanzo, L.
core   +1 more source

DESIGN AND SIMULATION OF ASK 31 CHANNEL FREQUENCY HOPPING SPREAD SPECTRUM (FH/SS) TRANSCIEVER SYSTEM USING CONTIGUOUS BAND PASS FILTER BANKS

Diyala Journal of Engineering Sciences, 2010
This paper propose a design and simulation of Amplitude Shift Keying (ASK ) 31 channel frequency hopping spread spectrum (FH/SS) transceiver system. The proposed design is implemented using Matlab/Simulink package.
Khalid Humood
doaj  

Resistance to Overdoping Allows Over 2000 S cm−1 Conductivity in P(g3BTTT) With Anion‐Exchange Doping

Advanced Materials, EarlyView.
Anion‐exchange doping of conjugated polymers is an effective way to achieve high conductivities. Here, we report over 2000 S cm−1 electrical conductivity for doped P(g3BTTT). In addition, we show that P(g3BTTT) sustains exceptionally high doping levels without any drop in the charge mobility.
Basil Hunger, Maximilian M. Horn, Eva Röck, Diego Rosas Villalva, Lize Bynens, Jochen Vanderspikken, Christina Kousseff, Silène Gobeil, Olivier Bardagot, Nesibe Akmanşen‐Kalayci, Sarah H. Tolbert, Iain McCulloch, Wouter Maes, Demetra Tsokkou, Natalie Banerji   +14 more
wiley   +1 more source

The algorithm of radioelectronic suppression of radiostations with frequency-hopping spread spectrum

Доклады Белорусского государственного университета информатики и радиоэлектроники, 2019
The algorithm for suppressing tactical radiostations with frequency-hopping spread spectrum (FHSS) was developed. The effectiveness impact of polyharmonic unmodulated interference on the radiotransmission of a radio station with FHSS was estimated.
A. L. Matyushkov, V. O. Senyuk, K. V. Stupin   +2 more
doaj  

Organic Materials of Tomorrow: Horizons of Artificial Intelligence

Advanced Materials, EarlyView.
This review examines machine learning techniques accelerating the discovery of organic semiconductors by linking molecular structure to properties. Key methods include graph neural networks, generative models, and active learning. Applications to organic photovoltaics demonstrate practical impact.
Harold Mena, J. Terence Blaskovits, Kun‐Han Lin, Denis Andrienko   +3 more
wiley   +1 more source

Why Is the Mechanism Underlying the Chiral‐Induced Selectivity Effect Still Challenging?

Advanced Materials, EarlyView.
The chiral‐induced spin selectivity (CISS) effect is observed in many experimental configurations and for different materials. However, there are theoretical challenges in attempting to explain those results. A qualitative framework for explaining all the results is presented.
Ron Naaman, Yossi Paltiel
wiley   +1 more source