Results 41 to 50 of about 3,313 (180)

Routing and Downlink Resource Allocation for Multicast Traffic in LEO Satellite Constellations

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT In this work, we optimize unicast and multicast traffic delivery over non‐terrestrial networks (NTNs) to users on the ground through direct satellite downlink (DL). We consider a gateway‐free mesh architecture with low Earth orbit (LEO) satellites interconnected via inter‐satellite links (ISLs), where unicast and multicast services compete for
Federico Lozano‐Cuadra, Israel Leyva‐Mayorga, Jimmy Jessen Nielsen, Beatriz Soret   +3 more
wiley   +1 more source

DrLS: Distortion‐Resistant Lossless Steganography via Colour Depth Interpolation

CAAI Transactions on Intelligence Technology, EarlyView.
ABSTRACT The lossless data steganography is to hide a certain amount of information into a container image. Previous lossless steganography methods fail to strike a balance between capacity, imperceptibility, accuracy, and robustness, commonly vulnerable to distortion on container images.
Youmin Xu, Xuanyu Zhang, Xiandong Meng, Jian Zhang   +3 more
wiley   +1 more source

On BER Performance of EBPSK-MODEM in AWGN Channel

Sensors, 2010
In order to satisfy the higher and higher demand for communication systems, an Extended Binary Phase Shift Keying (EBPSK) system with very high spectra efficiency has been proposed. During the research, a special kind of filters was found, which can amplify the signal characteristics and remove utmost noise, i.e., at the point of the phase jumping ...
Wu, Feng
openaire   +4 more sources

Image Steganography Based on NR-Polar DCSK System over Multipath Fading Channel

Journal of Communications Software and Systems
Protecting sensitive data has become an urgent necessity in wireless communication, which predates the emergence of Internet development, where signals transmitted over a channel are distorted by fading, noise, attackers, and interference, which leads to
Noor Dheyaa Majeed, Ali Jaber Al-Askery, Fadhil Sahib Hasan   +2 more
doaj   +1 more source

Hyperspectral Unmixing with Bandwise Generalized Bilinear Model

Remote Sensing, 2018
Generalized bilinear model (GBM) has received extensive attention in the field of hyperspectral nonlinear unmixing. Traditional GBM unmixing methods are usually assumed to be degraded only by additive white Gaussian noise (AWGN), and the intensity of ...
Chang Li, Yu Liu, Juan Cheng, Rencheng Song, Hu Peng, Qiang Chen, Xun Chen   +6 more
doaj   +1 more source

CLEAR Interference Cancellation in a Wideband Dual‐Channel Receiver for Independent Satellite Multi‐Connectivity Links

International Journal of Satellite Communications and Networking, Volume 44, Issue 6, Page 689-699, November/December 2026.
ABSTRACT In this paper, the correlation learning estimation and adaptive reduction (CLEAR) of interference, an adaptive, blind and transparent interference compensation method applied in a wideband dual‐channel receiver, is studied for a pair of independent satellite multi‐connectivity links, using the same carrier frequency and signal bandwidth in use
Svilen Dimitrov
wiley   +1 more source

Feedback Capacity of OU-Colored AWGN Channels

2023 IEEE International Symposium on Information Theory (ISIT), 2023
2023 IEEE International Symposium on Information Theory (ISIT) 25-30 June 2023, Taipei ...
Su, Jun, Han, Guangyue, Shamai Shitz, Shlomo   +2 more
openaire   +2 more sources

Comparative analysis of the effectiveness of BPG, AGU, AVIF and HEIF compression methods for medical images corrupted by noise of two types

Радіоелектронні і комп'ютерні системи
The subject matter is lossy compression using the BPG, AGU, AVIF, and HEIF encoders for medical images with different levels of visual complexity corrupted by additive Gaussian and Poisson noise.
Viktoriia Naumenko, Volodymyr Lukin, Vitalii Naumenko, Nadiia Kozhemiakina, Mykyta Solodovnyk   +4 more
doaj   +1 more source

Space‐Time Metasurface Antenna Enabled High‐Dimensional Electromagnetic Modulation for Intrinsic Physical Layer Security

Advanced Science, Volume 13, Issue 57, 14 October 2026.
The concept of high‐dimensional EM modulation using the STMA for physical layer secure communication is illustrated in figure. The STMA consists of a series of programmable unit cells, with 1‐bit reconfigurable phase states (0/π). The STMA is excited by a monochromatic continuous wave (CW) at frequency fc and controlled by a field‐programmable gate ...
Xinyu Fang, Yiqing Sun, Chenfeng Yang, Siran Wang, Zheng Xing Wang, Kaixu Wang, Geng‐Bo Wu   +6 more
wiley   +1 more source

Noise Reduction in Audio

Journal of Computing Research and Innovation, 2018
Noise reduction in audio is a process of minimizing the presence of noise in the audio signal. Noise reduction approach helps user understand how to remove noise from the signal.
Zulfikri Paidi, Nurhasyimah Idrus
doaj