Results 1 to 10 of about 1,605,056 (288)
Design of a Compact Dual-Band MIMO Antenna System with High-Diversity Gain Performance in Both Frequency Bands [PDF]
Micromachines, 2021 A compact four-element dual-band multiple-input and multiple-output (MIMO) antenna system is proposed to achieve high isolation and low channel capacity loss.
Wazie M. Abdulkawi +5 more
doaj +2 more sources
Multiuser Diversity Gain in Cognitive Networks [PDF]
IEEE/ACM Transactions on Networking, 2010 Dynamic allocation of resources to the \emph{best} link in large multiuser networks offers considerable improvement in spectral efficiency. This gain, often referred to as \emph{multiuser diversity gain}, can be cast as double-logarithmic growth of the ...
Tajer, Ali, Wang, Xiaodong
core +2 more sources
Wake-Up Receiver with Equal-Gain Antenna Diversity [PDF]
Sensors, 2017 Small scale fading signals resulting from multipath propagation can cause signal strength variations in the range of several dB. Resulting from the fluctuating signal strengths, the wake-up packet reception rate can decrease significantly.
Timo Kumberg +2 more
doaj +4 more sources
Diversity Gain through Antenna Blocking
International Journal of Antennas and Propagation, 2012 As part of the typical usage mode, interaction between a handheld receiver antenna and the operator's RF absorbing body and nearby objects is known to generate variability in antenna radiation characteristics through blocking and pattern changes.
V. Dehghanian, J. Nielsen, G. Lachapelle
doaj +4 more sources
Selection effects on diversity and genetic gain. [PDF]
Silva Fennica, 1991 Four different methods of truncation selection were studied in a population consisting of a large number of unrelated full sib families of equal size: phenotype selection, family selection, within-family selection and combined index selection (optimal ...
Wei, Run-Peng, Lindgren, Dag
doaj +2 more sources
Assessing genetic gain and diversity in Ethiopian bread wheat across six decades [PDF]
Scientific ReportsAssessing breeding progress and genetic diversity in released varieties is crucial for informing future crop improvement strategies. This study evaluated genetic gain and diversity in 49 Ethiopian wheat varieties released over six decades (1967–2021 ...
Sefawdin Berta +4 more
doaj +2 more sources
Diversity Gain Influenced by Polarization and Spatial Diversity Techniques in Ultrawideband
IEEE Access, 2015 This paper presents an experimental investigation of diversity gain influenced by polarization and spatial diversity techniques in ultrawideband (UWB) radio technology.
Mohsen Koohestani +3 more
doaj +2 more sources
Optimal Multi-Antenna Transmission for the Cooperative Non-Orthogonal Multiple-Access System
Applied Sciences, 2021 We investigate the beamforming for the multi antenna cooperative non-orthogonal multiple access (NOMA) system, where an access point (AP) delivers messages for multiple user terminals (UT) with successive interference cancellation (SIC) reception method.
Duckdong Hwang +3 more
doaj +1 more source
IEEE Access, 2022 In this paper, we analyzed the diversity performance with increased pointing error caused by multiple beam transmissions for spatial diversity based vertical free space optical (FSO) back-haul links.
Sung-Jin Kim, Sang-Kook Han
doaj +1 more source
Sensors, 2022 We proposed the statistical misalignment model and the power-efficient configuration of transceivers for bi-directional multi-input and multi-output (MIMO) based vertical free space optical (FSO) links.
Sung-Jin Kim, Sang-Kook Han
doaj +1 more source