Multiband CSMA/CA with RTS-CTS strategy [PDF]
, 2014 We present in this paper a new medium access control (MAC) scheme devoted to orthogonal frequency division multiple access (OFDMA) systems which aims at reducing collision probabilities during the channel request period.
Do, Jean-Baptiste +3 more
core +4 more sources
General Signal Model for Multiple-Input Multiple-Output GMTI Radar
Sensors, 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
Frequency-domain precoding for single carrier frequency-division multiple access [PDF]
, 2009 At present there is considerable interest in the use of single carrier frequency-division multiple access. This interest is justified by the inherent single carrier structure of the SC-FDMA scheme, which is more robust against phase noise and has a lower
Nix, AR, Noune, MB
core +2 more sources
Multiple access based on three-stage modulation in multi-band OFDM-UWB system
Tongxin xuebao, 2007 According to the characteristics of multi-band orthogonal frequency-division multiplexing ultra-wideband（OFDM-UWB） system,a multiple access based on three-stage modulation（TSM-MA） was proposed.It combined multi-carrier code division multiple access（MC ...
BAO Zhi-hua +3 more
doaj +2 more sources
Linear equalizers for quasi-synchronous block spreading CDMA systems [PDF]
, 2009 Recently, a block spreading code division multiple access (BS-CDMA) technique was presented whereby user-specific preceding along with orthogonal spreading codes are used to achieve multi-user interference (MUI) free when all users arrive at the base ...
Bocus, MZ, Coon, JP, Yue, Wang
core +2 more sources
Performance evaluation of channel estimation techniques for a proposed '4G' MC-CDMA based system in a time varying channel [PDF]
, 2004 This paper investigates the performance of channel estimation techniques applied to a proposed fourth generation (4G) multi carrier - code division multiple access (MC-CDMA) system.
Armour, SMD +3 more
core +2 more sources
Optimal low-complexity detection for space division multiple access wireless systems [PDF]
, 2006 A symbol detector for wireless systems using space division multiple access (SDMA) and orthogonal frequency division multiplexing (OFDM) is derived. The detector uses a sphere decoder (SD) and has much less computational complexity than the naive maximum
Cui, Tao, Tellambura, Chintha, Wu, Yue
core +1 more source
Implementation of Multiple Access Techniques Applicable for Maritime Satellite Communications [PDF]
TransNav, 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
On the Comparison of Optimal NOMA and OMA in a Paradigm Shift of Emerging Technologies
IEEE Access, 2022 Non-orthogonal multiple access (NOMA) is a better multiple access technique than orthogonal multiple access (OMA), precisely orthogonal frequency division multiple access (OFDMA) scheme, at the conceptual level for fifth-generation (5G) networks and ...
Joydev Ghosh +5 more
doaj +1 more source
Impact of Mobility on the Sum Rate of NB-OFDMA Based Mobile IoT Networks
, 2016 In future Internet of Things (IoT) networks, the explosive growth of mobile devices compel us to reconsider the effectiveness of the current frequency-division multiple access (FDMA) schemes.
Jiao, Chunxu +2 more
core +1 more source