Results 1 to 10 of about 2,093,139 (198)

RIS-Assisted Cooperative Time-Division Multiple Access [PDF]

open access: yesSensors, 2023
Reconfigurable intelligent surface-aided communication systems have been intensively investigated to improve capacity, coverage, and energy efficiency via optimal controlling of phase shifts for passive reflecting elements. However, there are few studies
Hyukmin Son, Beom Kwon
doaj   +4 more sources

Time-Hopping Multicarrier Code-Division Multiple Access [PDF]

open access: yesIEEE Transactions on Vehicular Technology, 2007
A time-hopping multicarrier code-division multiple-access (TH/MC-CDMA) scheme is proposed and investigated. In the proposed TH/MC-CDMA, each information symbol is transmitted by a number of time-domain pulses with each time-domain pulse modulating a subcarrier.
Lie-liang Yang, Senior Member
openaire   +6 more sources

Distributed Time-Frequency Division Multiple Access Protocol for Wireless Sensor Networks [PDF]

open access: yesIEEE Wireless Communications Letters, 2012
It is well known that biology-inspired self-maintaining algorithms in wireless sensor nodes achieve near optimum time division multiple access (TDMA) characteristics in a decentralized manner and with very low complexity. We extend such distributed TDMA approaches to multiple channels (frequencies).
Buranapanichkit, D, Andreopoulos, Y
openaire   +7 more sources

Iterative Interference Cancellation for Time Reversal Division Multiple Access

open access: yesIEEE Access, 2023
Time Reversal (TR) has been proposed as a competitive precoding strategy for low-complexity devices, relying on ultra-wideband waveforms. This transmit processing paradigm can address the need for low power and low complexity receivers, which is ...
Ali Mokh   +6 more
doaj   +4 more sources

Distributed Passive Positioning and Sorting Method for Multi-Network Frequency-Hopping Time Division Multiple Access Signals [PDF]

open access: yesSensors
When there are time division multiple access (TDMA) signals with large bandwidth, waveform aliasing, and fast frequency-hopping in space, current methods have difficulty achieving the accurate localization of radiation sources and signal-sorting from ...
Jiaqi Mao, Feng Luo, Xiaoquan Hu
doaj   +2 more sources

Contention-based Time Division Multiple Access MAC Protocol in Vehicular Ad Hoc Networks [PDF]

open access: yesJisuanji gongcheng, 2021
The high speed of vehicle movement and fast change of network topology make it a challenge to design a reliable Medium Access Control(MAC) protocol to meet the low latency and high throughput requirements of Vehicular Ad Hoc Networks(VANETs).This paper ...
ZHANG Benhong, WU Haohao, YU Lei
doaj   +1 more source

Analyses of Space Division Multiple Access (SDMA) Schemes for Global Mobile Satellite Communications (GMSC) [PDF]

open access: yesTransNav, 2020
This paper describes analyzes of the Space Division Multiple Access (SDMA) technique and their hybrids with other Multiple Access Technique (MAT) such as Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), and Code Division ...
Stojce Dimov Ilcev
doaj   +1 more source

Joint Power and Time Allocation in Hybrid NoMA/OMA IoT Networks for Two-Way Communications

open access: yesEntropy, 2022
This article investigates two-way communications between an access point (AP) and multiple terminals in low-cost Internet of Things (IoT) networks. The main issues considered are the asymmetric transmission traffic on the uplink (UL) and downlink (DL ...
Dong-Hua Chen, En-Hua Jiang
doaj   +1 more source

Implementation of Multiple Access Techniques Applicable for Maritime Satellite Communications [PDF]

open access: yesTransNav, 2013
In this paper are introduced fundamentals, characteristics, advantages and disadvantages of Multiple Access (MA) employed as transmission techniques in the Maritime Mobile Satellite Communications (MMSC) between ships and Coast Earth Station (CES) via ...
Stojce Dimov Ilcev
doaj   +1 more source

A Link Distance Division Based Time Division Multiple Access Protocol for Directional Aeronautical Relay Networks

open access: yesXibei Gongye Daxue Xuebao, 2020
In directional aeronautical relay networks, the airplane relay explores the advantages of the directional antenna, in terms of long transmission distance, low transmission power, small interference range and so on, to help the ground nodes transmitting ...

doaj   +1 more source

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