Results 11 to 20 of about 404,248 (295)

Spectrum Awareness in Cognitive Radio Systems [PDF]

open access: yesInternational Journal of Electronics and Telecommunications, 2020
The paper addresses the issue of the Electromagnetic Environment Situational Awareness techniques. The main focus is put on sensing and the Radio Environment Map. These two dynamic techniques are described in detail.
M. Suchański   +4 more
doaj   +1 more source

DeepREM: Deep-Learning-Based Radio Environment Map Estimation From Sparse Measurements

open access: yesIEEE Access, 2023
Radio environment maps depict the coverage area of cellular networks. They are usually estimated by interpolating sparse measurements gathered in test drives.
Andrea Chaves-Villota   +1 more
doaj   +1 more source

Algorithm for Dynamic Fingerprinting Radio Map Creation Using IMU Measurements

open access: yesSensors, 2021
While a vast number of location-based services appeared lately, indoor positioning solutions are developed to provide reliable position information in environments where traditionally used satellite-based positioning systems cannot provide access to ...
Peter Brida   +3 more
doaj   +1 more source

UAV-Aided Radio Map Construction Exploiting Environment Semantics

open access: yesIEEE Transactions on Wireless Communications, 2023
This paper constructs a full dimensional (6D) radio map to predict the channel gain between any transmitter location and any receiver location based on received signal strength (RSS) measurements between low-altitude aerial nodes and ground nodes.
Wenjie Liu, Junting Chen
openaire   +3 more sources

An Improvement of Security Scheme for Radio Environment Map Under Massive Attacking

open access: yesIEEE Access, 2022
Radio environment maps (REM) are widely used to enhance communication efficiency in spatial spectrum sharing. This can be generated using reports from the terminals.
Ying Gao, Takeo Fujii
doaj   +1 more source

Building accurate radio environment maps from multi-fidelity spectrum sensing data [PDF]

open access: yes, 2015
In cognitive wireless networks, active monitoring of the wireless environment is often performed through advanced spectrum sensing and network sniffing. This leads to a set of spatially distributed measurements which are collected from different sensing ...
Couckuyt, Ivo   +9 more
core   +2 more sources

Radio Environment Map Construction Using Super-Resolution Imaging for Intelligent Transportation Systems

open access: yesIEEE Access, 2020
Radio environment map (REM) has emerged as a crucial technology to improve the robustness of intelligent transportation systems (ITS) by enhancing network planning and spectrum resource utilization.
Yubing Deng   +6 more
doaj   +1 more source

Incumbent user active area detection for Licensed Shared Access [PDF]

open access: yes, 2016
© 2015 IEEE. Licensed Shared Access is a European standardisation effort which promotes repository based quasi-static hierarchical spectrum sharing. In this scheme the sharing time base is in the order of months if not years.
Dutkiewicz, E   +2 more
core   +1 more source

A Kriging-Based Radio Environment Map Construction and Channel Estimation System in Threatening Environments

open access: yesIEEE Access, 2023
Radio environment map (REM) provides detailed information on the coverage of the primary terminals of wireless communication systems. The spatial estimation of the channel condition is directly related to the radio environment.
Ying Gao, Takeo Fujii
doaj   +1 more source

Indirect Methods for Constructing Radio Environment Map [PDF]

open access: yes2018 IEEE Canadian Conference on Electrical & Computer Engineering (CCECE), 2018
This paper presents the indirect methods for constructing radio environment maps (REMs), which utilize known model information, to first estimate the primary transmitter parameters and then generate REMs. Two indirect methods under lognormal shadowing are presented and compared.
Safwan Alfattani, Abbas Yongacoglu
openaire   +1 more source

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