Performance Evaluation of Low Density Spreading Multiple Access [PDF]
, 2012 In this paper, we evaluate the performance of Multicarrier-Low Density Spreading Multiple Access (MC-LDSMA) as a multiple access technique for mobile communication systems. The MC-LDSMA technique is compared with current multiple access techniques, OFDMA
AL-Imari, Mohammed +3 more
core +1 more source
Non-Orthogonal Multiple Access for Hybrid VLC-RF Networks with Imperfect Channel State Information [PDF]
, 2020 The present contribution proposes a general framework for the energy efficiency analysis of a hybrid visible light communication (VLC) and Radio Frequency (RF) wireless system, in which both VLC and RF subsystems utilize nonorthogonal multiple access ...
Al-Qutayri, Mahmoud +4 more
core +2 more sources
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
Energy-efficiency for MISO-OFDMA based user-relay assisted cellular networks [PDF]
, 2020 The concept of improving energy-efficiency (EE) without sacrificing the service quality has become important nowadays. The combination of orthogonal frequency-division multiple-access (OFDMA) multi-antenna transmission technology and relaying is one of ...
Baştürk, İlhan, Chen, Yunfei
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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Performance evaluation of hybrid ARQ schemes of 3GPP LTE OFDMA system [PDF]
, 2007 Expectations and requirements for future wireless communication systems continue to grow and evolve. Thus, recently, the Third Generation Partnership Project (3GPP) has considered the Long Term Evolution (LTE) of 3G - also known as Super 3G - to ensure ...
Armour, SMD, Beh, KC, Doufexi, A
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Performance evaluation of channel estimation techniques for MIMO-OFDM systems with adaptive sub-carrier allocation [PDF]
, 2006 Dynamic Sub-Carrier Allocation (DSA) strategies have been shown previously to achieve significant performance benefits when applied to OFDMA systems and further benefits for MIMOOFDMA systems.
Armour, SMD, McGeehan, JP, Peng, Y
core +2 more sources
MU-MIMO enabled uplink OFDMA MAC protocol in dense IEEE 802.11ax WLANs
ICT Express, 2020 IEEE 802.11ax supports orthogonal frequency division multiple access (OFDMA) for uplink (UL) transmissions where stations (STAs) access randomly chosen resource units (RUs) in a distributed manner.
Sohyun Joo +3 more
doaj +1 more source
Radio resource allocation for uplink OFDMA systems with finite symbol alphabet inputs [PDF]
, 2014 In this paper, we consider the radio resource allocation problem for uplink orthogonal frequency-division multiple-access (OFDMA) systems. The existing algorithms have been derived under the assumption of Gaussian inputs due to its closed-form expression
Al-Imari, Mohammed +3 more
core +1 more source
Application of Wi-Fi 6 Technology in Coal Mine
Meikuang Anquan, 2020 The wireless network coverage scheme of Wi-Fi 6 in underground coal mine is designed to solve the problem that 5G communication cannot achieve the whole mine signal coverage in underground coal mine.
ZHANG Jinhao, CHEN Min
doaj +1 more source