Results 21 to 30 of about 995,022 (301)

Optimal Subcarrier Allocation Algorithm for OFDMA Systems [PDF]

open access: yesEngineering and Technology Journal, 2013
An optimal subcarrier allocation algorithm is proposed for orthogonal frequency division multiple access systems over Rayleigh fading channels with channel state information feedback. The transmitted orthogonal frequency division multiple access frame is
Sahar Salman Mahmood
doaj   +1 more source

Energy-efficiency improvements for optical access [PDF]

open access: yes, 2014
This article discusses novel approaches to improve energy efficiency of different optical access technologies, including time division multiplexing passive optical network (TDM-PON), time and wavelength division multiplexing PON (TWDM-PON), point-to ...
Anthapadmanabhan, P   +8 more
core   +1 more source

Block Interleaved Frequency Division Multiple Access for Power Efficiency, Robustness, Flexibility, and Scalability

open access: yesEURASIP Journal on Wireless Communications and Networking, 2009
The multiple access solution in an IMT-Advanced mobile radio system has to meet challenging requirements such as high throughput, low delays, high flexibility, good robustness, low computational complexity, and a high power efficiency, especially in
Tommy Svensson   +5 more
doaj   +2 more sources

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

open access: yesTransNav, 2020
This paper introduces analyzes of the Frequency Division Multiple Access (FDMA) applicable in Global Mobile Satellite Communications (GMSC). In satellite systems, as a rule, especially in GMSC many users are active at the same time.
Stojce Dimov Ilcev
doaj   +1 more source

A novel frequency-domain implementation of Tomlinson-Harashima precoding for SC-FDMA [PDF]

open access: yes, 2009
There is considerable interest in the use of single carrier frequency division multiple access (SC-FDMA) as the uplink transmission scheme in the 3GPP Long Term Evolution standard. This interest is justified by the inherent single carrier structure of SC-
Nix, AR, Noune, MB
core   +2 more sources

General Signal Model for Multiple-Input Multiple-Output GMTI Radar

open access: yesSensors, 2018
Multiple-input multiple-output (MIMO) ground moving target indication (GMTI) radar has been studied recently because of its excellent performance. In this paper, a general signal model is established for the MIMO GMTI radar with both fast-time and slow ...
Fuyou Li   +4 more
doaj   +1 more source

Hybrid model for throughput evaluation of orthogonal frequency division multiple access networks

open access: yesThe Journal of Engineering, 2014
Data throughput is an important metric used in the performance evaluation of the next generation cellular networks such as long-term evolution (LTE) and LTE-advanced.
Shyam Babu Mahato   +4 more
doaj   +1 more source

Suboptimal Resource Allocation for MIMO-FDMA Systems [PDF]

open access: yesEngineering and Technology Journal, 2014
In this paper, a pragmatic resource allocation algorithm for single-cell downlink multi input-multi-output (MIMO) based orthogonal frequency division multiple access(OFDMA) systems is proposed.
Salah AwadAliesawi
doaj   +1 more source

Joint Tomlinson-Harashima precoding and optimum transmit power allocation for SC-FDMA [PDF]

open access: yes, 2010
Single-Carrier Frequency Division Multiple Access (SC-FDMA) has been selected as the uplink transmission scheme in the 3GPP Long Term Evolution standard.
Nix, AR, Noune, MB
core   +2 more sources

A Hybrid Anti-Collision Protocol Based on Frequency Division Multiple Access (FDMA) and Time Division Multiple Access (TDMA) for Radio Frequency Identification (RFID) Readers

open access: yesNetwork
Radio Frequency Identification (RFID) technology plays a crucial role in various Internet of Things (IoT) applications, necessitating the integration of RFID systems into dense networks.
Mourad Ouadou   +2 more
doaj   +1 more source

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