Results 31 to 40 of about 44,293 (214)

Analytical Model of ALOHA and Time- and Frequency-Asynchronous ALOHA with Forward Error Correction for IoT Systems

open access: yesSensors, 2022
The blooming of internet of things (IoT) services calls for a paradigm shift in the design of communications systems. Short data packets sporadically transmitted by a multitude of low-cost low-power terminals require a radical change in relevant aspects ...
Federico Clazzer, Marcel Grec
doaj   +1 more source

Secured operating regions of Slotted ALOHA in the presence of interfering signals from other networks and DoS attacking signals

open access: yesJournal of Advanced Research, 2011
It is expected that many networks will be providing services at a time in near future and those will also produce different interfering signals for the current Slotted ALOHA based systems.
Jahangir H. Sarker, Hussein T. Mouftah
doaj   +1 more source

An Uplink Random Access Scheme Based on ALOHA System Assisted by Gain Division Multiple Access

open access: yesIEEE Access, 2023
Gain division multiple access (GDMA) is a non-orthogonal multiple access (NOMA) technique for uplink communications. In GDMA, the receiver employs both the magnitudes and phases of channel gains associated to the users to separate users.
Mao-Chao Lin   +3 more
doaj   +1 more source

Occupational exposures to solvents and metals are associated with fixed airflow obstruction

open access: yesScandinavian Journal of Work, Environment & Health, 2017
OBJECTIVES: This study investigated the associations between occupational exposures to solvents and metals and fixed airflow obstruction (AO) using post-bronchodilator spirometry. METHODS: We included 1335 participants from the 2002–2008 follow-up of the
Sheikh M Alif   +20 more
doaj   +1 more source

Analysis of guest satisfaction through the service quality of the Aloha department at Aloft Bali Seminyak

open access: yesJournal of Applied Sciences in Travel and Hospitality, 2022
This research discusses the assessment of guest satisfaction through the service quality that is provided by the Aloha department at Aloft Bali Seminyak.
Gede Aditya Gunawan   +3 more
doaj   +1 more source

The throughput of slotted aloha with diversity [PDF]

open access: yes2013 51st Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2013
Accepted for publications at 51st Annual Allerton Conference on Communication, Control, and ...
Munari, Andrea   +3 more
openaire   +3 more sources

A mobile controlled algorithm for improving the throughput in a s-aloha ds-cdma system [PDF]

open access: yes, 1996
This paper presents a novel adaptive DS-CDMA slotted-ALOHA packet random access scheme with transmitter-based spreading codes for mobiles. It is aimed at improving the throughput and message delay delivery when traffic load values below the saturation ...
Agustí Comes, Ramon   +1 more
core   +1 more source

ALOHA With Collision Resolution(ALOHA-CR): Theory and Software Defined Radio Implementation

open access: yes, 2009
A cross-layer scheme, namely ALOHA With Collision Resolution (ALOHA-CR), is proposed for high throughput wireless communications in a cellular scenario.
Dandekar, Kapil R.   +3 more
core   +2 more sources

Exploiting Regional Differences: A Spatially Adaptive Random Access [PDF]

open access: yes, 2015
In this paper, we discuss the potential for improvement of the simple random access scheme by utilizing local information such as the received signal-to-interference-plus-noise-ratio (SINR).
Kim, Dong Min, Kim, Seong-Lyun
core   +1 more source

Performance Evaluation of LoRaWAN for Green Internet of Things

open access: yesIEEE Access, 2019
LoRa is a long-range, low power and single-hop wireless technology that has been envisioned for Internet of Things (IoT) applications having battery driven nodes.
Zulfiqar Ali   +4 more
doaj   +1 more source

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