Results 11 to 20 of about 36,689 (267)

Satellite Communications

EURASIP Journal on Wireless Communications and Networking, 2008
The call for papers resulted in a high number of submis- sions, from which we have been able to select 12 excellent papers dealing with the different aspects of satellite commu- nications and navigation. Multiple-input multiple-output (MIMO) techniques are attracting a considerable amount of attention from within the terrestrial wireless community. The
Ray E. Sheriff, Anton Donner, Alessandro Vanelli-Coralli   +2 more
openaire   +3 more sources

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

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

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

SMG-UAV: Sparse Mutual Guided RGB–Event Fusion for Robust UAV Detection in Challenging Dynamic Environments

Drones
Robust unmanned aerial vehicle (UAV) detection in real low-altitude anti-UAV scenarios remains challenging due to motion blur, extreme illumination, cluttered backgrounds, and tiny target sizes.
Ruizhi Zhang, Jinghua Hou, Yan Shi, Xiping Dai, Ke Zhang, Jingjing Diao   +5 more
doaj   +1 more source

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

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