Results 11 to 20 of about 429,305 (296)

Gap Analysis in Satellite Communication Services [PDF]

فصلنامه علوم و فناوری فضایی, 2023
The national information network is being implemented with the aim of providing the services needed by the people through internal infrastructure and independent of international internet platforms.
Leila Mohammadi, Parvin Sojoodi, Mohammad Bod, saeed sheikhzadeh   +3 more
doaj   +1 more source

Reweighted Nuclear Norm and Total Variation Regularization With Sparse Dictionary Construction for Hyperspectral Anomaly Detection

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Hyperspectral anomaly detection is an important technique in the field of remote sensing image processing. Over the last few years, low rank and sparse matrix decomposition (LRSMD) has played an increasingly significant role in hyperspectral anomaly ...
Xiaoyi Wang, Liguo Wang, Jiawen Wang, Kaipeng Sun, Qunming Wang   +4 more
doaj   +1 more source

A Novel Weighted KNN Algorithm Based on RSS Similarity and Position Distance for Wi-Fi Fingerprint Positioning

IEEE Access, 2020
In Wi-Fi fingerprint positioning, what we should most care about is the distance relationship between the user and the reference points (RP). However, most of the existing weighted k-nearest neighbor (WKNN) algorithms use the Euclidean distance of ...
Boyuan Wang, Xingli Gan, Xuelin Liu, Baoguo Yu, Ruicai Jia, Lu Huang, Haonan Jia   +6 more
doaj   +1 more source

Carrier Aggregation in Multi-Beam High Throughput Satellite Systems [PDF]

, 2019
Carrier Aggregation (CA) is an integral part of current terrestrial networks. Its ability to enhance the peak data rate, to efficiently utilize the limited available spectrum resources and to satisfy the demand for data-hungry applications has drawn ...
Al-Hraishawi, Hayder, Chatzinotas, Symeon, Kibria, Mirza Golam, Lagunas, Eva, Maturo, Nicola, Spano, Danilo   +5 more
core   +2 more sources

On the virtualization and dynamic orchestration of satellite communication services [PDF]

, 2016
Key features of satellite communications such as wide-scale coverage, broadcast/multicast support and high availability, together with significant amounts of new satellite capacity coming online, anticipate new opportunities for satellite communications ...
Ahmed, Toufik, Duros, Emmanuel, Ferrús Ferré, Ramón Antonio, Gélard, Patrick, Koumaras, Harilaos, Kuhn, Nicolas, Rasheed, Tinku, Riggio, R., Sallent Roig, Oriol   +8 more
core   +2 more sources

Blind recognition of BCH codes in faster‐than‐Nyquist signalling system

Electronics Letters, 2016
Proposed is a blind recognition method for Bose–Chaudhuri–Hocquenghem (BCH) codes in the faster‐than‐Nyquist (FTN) signalling system which is based on the Galois field Fourier transform of the code polynomial.
Gang Wu, Bangning Zhang, Daoxing Guo, Xiaohu Liang   +3 more
doaj   +1 more source

Analysis of Quasi-Zenith Satellite System Signal Acquisition and Multiplexing Characteristics in China Area

Sensors, 2020
On the basis of realizing regional navigation, the Quasi-Zenith Satellite System (QZSS) has advanced navigation function, which leads to the broadcasting of more signals in a single frequency of QZSS signals. Current signal transmission technology cannot
Hongjun Ye, Xiaojun Jing, Liang Liu, Maolei Wang, Shuo Hao, Xingkang Lang, Baoguo Yu   +6 more
doaj   +1 more source

A Modified Regular Perturbation Model for the Single-Span Fiber Transmission Using Learnable Methods

Photonics
In fiber optic communication systems, the dispersion and nonlinear interaction of optical signals are critical to modeling fiber optic communication, and the regular perturbation (RP) model is a simplified modeling method composed of parallel branches ...
Shuhong He, Zhongya Li, Sizhe Xing, An Yan, Yingjun Zhou, Jianyang Shi, Chao Shen, Ziwei Li, Zhixue He, Wei Chen, Nan Chi, Junwen Zhang   +11 more
doaj   +1 more source

High symbol-rate polarization interference cancelation for satellite-to-ground remote sensing data transmission system

EURASIP Journal on Wireless Communications and Networking, 2018
To remove the impacts of polarization interference on satellite-to-ground high-speed data transmission systems, the major factors that affect polarization interference are concluded, the deteriorations of bit error rate (BER) of different modulation ...
Zhisong Hao, Zhiming Zheng
doaj   +1 more source

Methodology to Enhance the Predictability of I/O Data Exchange Between Device and Tasks [PDF]

Journal of Astronomy and Space Sciences, 2007
Data coming from devices shall be transported to a specific task to be used in a software with the most accurate time and data integrity. During this process, a potential cause for invoking structured hazard and performance degradation is dormant.
Cheol-Hea Koo, Koon-Ho Yang, Seong-Bong Choi   +2 more
doaj   +1 more source