Results 21 to 30 of about 5,091,176 (291)
Spatial processing for frequency diversity schemes [PDF]
IEEE Transactions on Signal Processing, 2000 A novel technique to obtain optimum blind spatial processing for frequency diversity spread spectrum (FDSS) communication systems is introduced. The sufficient statistics for a linear combiner, which prove ineffective due to the interferers frequency characteristics, are modified to yield improved detection under partial jamming in the spectral domain.
Lagunas Hernandez, Miguel A. +3 more
openaire +2 more sources
A modified Alamouti scheme for frequency selective channels incorporating turbo equalization [PDF]
, 2002 The Alamouti scheme can achieve transmit diversity in the presence of frequency selective flat fading channels. The technique has received considerable attention mainly because of its processing simplicity. Recently, a modification to the Alamouti scheme
Nix, AR +3 more
core +1 more source
Vegetation composition on peatlands with different fire frequency in Musi Banyuasin, South Sumatra
Journal of Natural Resources and Environmental Management, 2022 Peatlands that experience fire have the ability to restore their own environment through a process of vegetation succession. Areas with different frequency of fires have different vegetation dominance.
Awaludin Jamil +2 more
doaj +1 more source
Canadian Journal of Applied Linguistics, 2023 This study aims to examine the relationship between the productive knowledge of some lexical and phraseological indices and the quality of English as a Foreign Language (EFL) learners’ writing.
Brahim Ait Hammou +3 more
doaj +1 more source
Impacts of frequency increment errors on frequency diverse array beampattern [PDF]
EURASIP Journal on Advances in Signal Processing, 2015 Different from conventional phased array, which provides only angle-dependent beampattern, frequency diverse array (FDA) employs a small frequency increment across the antenna elements and thus results in a range angle-dependent beampattern. However, due to imperfect electronic devices, it is difficult to ensure accurate frequency increments, and ...
Kuandong Gao +4 more
openaire +2 more sources
Sensors, 2018 Device-free localization (DFL) that aims to localize targets without carrying any electronic devices is addressed as an emerging and promising research topic.
Yan Guo, Dongping Yu, Ning Li
doaj +1 more source
Area spectral efficiency of soft-decision space–time–frequency shift-keying-aided slow-frequency-hopping multiple access [PDF]
, 2012 Slow-frequency-hopping multiple access (SFHMA) can provide inherent frequency diversity and beneficially randomize the effects of cochannel interference.
Ngo, Hoang Anh +3 more
core +1 more source
A Novel Device-Free Counting Method Based on Channel Status Information
Sensors, 2018 Crowd counting is of significant importance for numerous applications, e.g., urban security, intelligent surveillance and crowd management. Existing crowd counting methods typically require specialized hardware deployment and strict operating conditions,
Junhuai Li +4 more
doaj +1 more source
Space scanning FMCW-based two-dimensional frequency diverse array radar
The Journal of Engineering, 2019 The frequency-modulated continuous wave (FMCW)-based frequency diverse array (FDA) radar concept is extended to two dimensions (2D). The radar operates as a linear pulsed FMCW/FDA in the transmission (TX) mode while it operates as a pulsed FMCW/phased ...
Savaş Karadağ +2 more
doaj +1 more source
Trees, Forests and People, 2021 Plant diversity and floristic composition of open scrub vegetation patches of Dachigam National Park, Kashmir in the Western Himalayas were assessed with an objective to develop a baseline data foundation for natural resource management plans and proper ...
Arif Yaqoob Malik +7 more
doaj +1 more source