Results 111 to 120 of about 66,735 (286)

Mine personnel cooperative location algorithm based on ultra-wideband

open access: yes河南理工大学学报. 自然科学版
ObjectivesTo address the issues of positioning blind zones, low localization accuracy for personnel at the working face, and non-line-of-sight (NLOS) errors in underground mines, a cooperative localization algorithm based on ultra-wideband (UWB ...
Wang Lei   +5 more
doaj   +1 more source

Performance of Hybrid Direct-Sequence Time-Hopping Ultrawide Bandwidth Systems over Nakagami-m Fading Channels

open access: yes, 2007
This paper investigates and compares the performance of various ultrawide bandwidth (UWB) systems when communicating over Nakagami-m fading channels. Specifically, the direct-sequence (DS), time-hopping (TH) and hybrid direct-sequence time-hopping (DS-TH)
Yang, Lie-Liang, Ahmed, Qasim Zeeshan
core  

Design of a UWB wide-slot antenna and a hemispherical array for breast imaging

open access: yes, 2009
A microstrip, fork fed, wide slot antenna, printed on high permittivity substrate has been developed for the transmission of ultra wide bandwidth (UWB) signals into the breast.
Gibbins, David   +5 more
core  

Locking control of underground signal lights based on improved Kalman filter and state observer

open access: yesGong-kuang zidonghua
During underground ramp transportation in non-coal mines, traditional signal light locking control method is ineffective due to insufficient UWB dynamic positioning accuracy, long sampling interval of vehicle positioning cards, and data loss.
WANG Xueming   +3 more
doaj   +1 more source

Iterative Code Acquisition for DS-UWB Downlink using Multiple-Component Decoders

open access: yes, 2008
Iterative code acquisition schemes employing beneficially chosen higher-order generator polynomials and multiple-component decoders are analysed in terms of the correct detection probability of the direct sequence-ultra-wideband (DS-UWB) downlink.
Won, S.H., Hanzo, L
core  

A Feasibility Study on UWB-only Robot Localization in Pre-built SLAM Maps via Anchor-TAG Calibration [PDF]

open access: diamond
Van-Tun Ha   +5 more
openalex   +1 more source

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