Results 21 to 30 of about 8,421 (222)
Novel Predistortion Algorithm for OFDMA [PDF]
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference, 2009 RF amplifier in a wireless communication system is usually non-linear in nature. If such an amplifier is used in OFDMA based systems, it will cause serious degradation. This degradation will be both in terms of the reduction in BER and the generation of out of band noise. In this paper we have worked on the linearization method of the amplifier.
Saqib Ali, Garik Markarian, Erdal Arikan
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Xibei Gongye Daxue Xuebao, 2021 Aiming at the problems of low efficiency of buffer information collection and sharp drop of system throughput caused by the aggravation of conflicts in the multi basic service set (BSS) high density deployment overlap coverage scenario of next generation
doaj +1 more source
Performance analysis of wireless compressed-image transmission over DST-based OFDMA systems
EURASIP Journal on Wireless Communications and Networking, 2023 Multimedia data, like images, consumes significant bandwidth when transmitted over wireless systems. Therefore, compressing transmitted images becomes crucial to reduce the required bandwidth and improve energy efficiency.
Nagi H. Al-Ashwal +3 more
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Multi-group frequency hopping OFDMA based on statistical multiplexing [PDF]
, 2008 In this paper, the multi-group frequency hopping OFDMA (MG-FH OFDMA) based on the statistical multiplexing is proposed for the downlink cellular system. Compared with the existed random frequency hopping OFDMA (RFH-OFDMA) system utilizing the statistical
Su, Xinghui +9 more
core +1 more source
Flexible resource allocation for joint optimization of energy and spectral efficiency in OFDMA multi-cell networks [PDF]
, 2015 The radio resource allocation problem is studied, aiming to jointly optimize the energy efficiency (EE) and spectral efficiency (SE) of downlink OFDMA multi-cell networks.
Jing, Wenpeng +4 more
core +1 more source
OFDMA Based QoS-Oriented Guarantee Novelty Multiple Access Protocol [PDF]
Xibei Gongye Daxue Xuebao, 2018 The next generation wireless local area network (WLAN) 802.11ax standards committee takes high quality of service(QoS) guarantee as one of important technology goals of the next generation WLAN.
doaj +1 more source
Buffer sharing on an OFDMA downlink
21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2010 In this work we consider the allocation of buffer space to data streams sharing a common high-speed wireless transmitter. As an example, we focus on an OFDMA-based downlink system scenario. Scheduling for maximum throughput has been extensively studied in the literature.
Tolga Girici +2 more
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Random beamforming OFDMA for future generation cellular communication systems [PDF]
, 2007 This paper presents a downlink performance analysis of a Layered Random Beamforming (LRB) - MIMO-OFDMA Physical Layer (PHY) as applicable to future generation wireless communication systems.
Joe McGeehan +9 more
core +1 more source
Optimal Subcarrier Allocation Algorithm for OFDMA Systems [PDF]
Engineering 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
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Optimal Scheduling for OFDMA Systems [PDF]
2006 Fortieth Asilomar Conference on Signals, Systems and Computers, 2006 We consider a scheduling and resource allocation problem for the downlink of an OFDMA-based wireless network, where the channel estimation error is modeled by a self-noise term in the decoding process. During each time-slot this involves selecting a subset of users for transmission, determining the assignment of available subcarriers to selected users,
Agrawal, Rajeev +3 more
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