Results 31 to 40 of about 4,915,463 (326)

3D Spatial Reuse of Multi-Millimeter-Wave Spectra by Ultra-Dense In-Building Small Cells for Spectral and Energy Efficiencies of Future 6G Mobile Networks

open access: yesEnergies, 2020
The sixth-generation (6G) mobile networks are expected to operate at a higher frequency to achieve a wider bandwidth and to enhance the frequency reuse efficiency for improved spectrum utilization.
Rony Kumer Saha
doaj   +1 more source

On Maximizing Energy and Spectral Efficiencies Using Small Cells in 5G and Beyond Networks

open access: yesSensors, 2020
Addressing high capacity at low power as a key design goal envisages achieving high spectral efficiency (SE) and energy efficiency (EE) for the next-generation mobile networks.
Rony Kumer Saha
doaj   +1 more source

Is re-farming the answer to the spectrum shortage conundrum? [PDF]

open access: yes, 2008
Radio spectrum has become one of the engines of economic growth. However, rapid technological change, ever increasing demands for new wireless services and the nature of spectrum as a scarce resource necessitate an urgent re-examination of issues such as
Curwen, Peter   +4 more
core   +3 more sources

A Hybrid System and Technique for Sharing Multiple Spectrums of Satellite Plus Mobile Systems With Indoor Small Cells in 5G and Beyond Era

open access: yesIEEE Access, 2019
In this paper, we propose multiple communication systems incorporating an integrated satellite-mobile system (iSMS) and an autonomous terrestrial-mobile system (aTMS), and a technique to share multiple reused spectrum bands of iSMS and aTMS with in ...
Rony Kumer Saha
doaj   +1 more source

On Exploiting Millimeter-Wave Spectrum Trading in Countrywide Mobile Network Operators for High Spectral and Energy Efficiencies in 5G/6G Era

open access: yesSensors, 2020
In this paper, we propose a dynamic exclusive-use spectrum access (DESA) method to improve the overall licensed millimeter-wave (mmWave) spectrum utilization of all mobile network operators (MNOs) in a country.
Rony Kumer Saha
doaj   +1 more source

A deep learning method for the recognition of solar radio burst spectrum [PDF]

open access: yesPeerJ Computer Science, 2022
Solar radiation is the excitation source that affects the weather in the atmosphere of the earth, and some solar activities such as flares and coronal mass ejections are often accompanied by radio bursts. The spectrum of solar radio bursts is helpful for
Jun-Cheng Guo   +4 more
doaj   +2 more sources

Understanding the Radio Spectrum of Thunderstorm Narrow Bipolar Events

open access: yesJournal of Geophysical Research - Atmospheres, 2019
This paper reports a study to understand the radio spectrum of thunderstorm narrow bipolar events (NBEs) or compact intracloud discharges, which are powerful sources of high‐frequency (HF) and very high frequency (VHF) electromagnetic radiation.
Ning-Yu Y. Liu   +7 more
semanticscholar   +1 more source

Deep Learning for Spectrum Sensing in Cognitive Radio

open access: yesSymmetry, 2021
The detection of primary user signals is essential for optimum utilization of a spectrum by secondary users in cognitive radio (CR). The conventional spectrum sensing schemes have the problem of missed detection/false alarm, which hampers the proper ...
Surendra Solanki   +2 more
semanticscholar   +1 more source

Improvement of Signal Reception Reliability at Satellite Spectrum Monitoring System

open access: yesIEEE Access, 2022
Extensively increasing numbers of radio electronic devices significantly complicate the electromagnetic situation under conditions of radio frequency spectrum deficiency and require improvement in the functions and mechanisms of spectrum monitoring ...
Kulakayeva Aigul   +4 more
doaj   +1 more source

Temporal prediction for spectrum environment maps with moving radiation sources

open access: yesIET Communications, 2023
Spectrum resources are becoming harder to come by for wireless communications. The spectrum environment map (SEM), which depicts the electromagnetic environment's current state and future trend, is a valuable technique for managing and allocating ...
Yi Zhao   +6 more
doaj   +1 more source

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