Results 21 to 30 of about 128,085 (304)

Alternating Direction Method of Multipliers for TOA-Based Positioning Under Mixed Sparse LOS/NLOS Environments

open access: yesIEEE Access, 2021
For positioning system based on wireless sensor networks, NLOS errors are one of the main factors to degrade localization performance of an algorithm, about which lots of research results and analysis have been published in previous literatures to ...
Chengwen He, Yunbin Yuan, Bingfeng Tan
doaj   +1 more source

The relationship between strategic leaders' foresight and strategic thinking competencies and employee line of sight to the mission and the vision in faith-based not-for-profit organisations [PDF]

open access: yes, 2021
Like any other organisation, not for profit organisations recognise the critical importance of having engaged employees to achieve their mission and vision.
Cheyne, Gillian
core   +1 more source

Mass hysteria among South African primary school learners in Kwa-Dukuza, KwaZulu-Natal

open access: yesSouth African Family Practice, 2010
During August 2002, at a primary school in Kwa-Dukuza, KwaZulu-Natal, 27 children who had been well when they left their homes collapsed at school, displaying tremors and shivers throughout their bodies. Many of the children also presented with abdominal
Indiran Govender
doaj   +1 more source

Joint Particle Filter and UKF Position Tracking in Severe Non-Line-Of-Sight Situations [PDF]

open access: yes, 2009
The performance of localization techniques in a wireless communication system is severely impaired by biases induced in the range and angle measures because of the non-line-of-sight (NLOS) situation, caused by obstacles in the transmitted signal path ...
Vidal, Josep   +4 more
core   +1 more source

Efficient non-line-of-sight imaging with computational single-photon imaging [PDF]

open access: yes, 2020
Single-photon detectors time-stamp incident photon events with picosecond accuracy. When combined with pulsed light sources, these emerging detectors record transient measurements of a scene containing the time of flight information of the direct light ...
O'Toole, Matthew   +2 more
core   +1 more source

A line-of-sight optimised MIMO architecture for outdoor environments [PDF]

open access: yes, 2006
The authors present an investigation on the capacity of Line-of-Sight (LoS) optimised and conventional (narrow-spaced) Multiple-Input Multiple-Output (MIMO) communication systems in outdoor environments. Under a LoS scenario, the channel is normally rank
Sarris, I   +4 more
core   +1 more source

Design of Multi-Missile Cooperative Guidance Law Based on Pulse Engine Characteristics [PDF]

open access: yesHangkong bingqi, 2022
Aiming at the design problem of multi-missile cooperative guidance law for attacking high-speed targets, a design method of multi-missile cooperative guidance law based on the working characteristics of pulse engine is proposed.
Pan Hui, Zhang Zhenlin, Guo Chao
doaj   +1 more source

Personal area networks with line-of-sight MIMO operation [PDF]

open access: yes, 2006
In this paper, the results of an on-body, line-of-sight (LOS), multiple-input, multiple-output (MIMO) channel sounding investigation are reported. Transmission takes place between on-body antennas and a uniform linear array, positioned at close range and
Williams, C   +3 more
core   +1 more source

Capacity evaluation of LoS-optimised and standard MIMO antenna arrays at 5.2 GHz [PDF]

open access: yes, 2007
In this paper, the channel capacity of MIMO communication systems is evaluated from measurements in a home environment at 5.2 GHz. The capacity performance of a novel line-of-sight (LoS)-optimised antenna array architecture is investigated and compared ...
Sarris, I   +3 more
core   +1 more source

Performance analysis of coverage probability in ultra-dense small cell networks based on fractional frequency reuse

open access: yes上海师范大学学报. 自然科学版, 2017
Based on stochastic geometry theory and probability theory,a fractional frequency reuse strategy was proposed to improve user communication quality by differentiating line-of-sight propagation from non-line-of-sight propagation in ultra-dense small cell ...
Wang Yuwei, Ge Jia, Yu Hui
doaj   +1 more source

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