RADIO PROPAGATION WITHIN COAL-MINE LONGWALL FACES AT 900 MHZ

Authors
ZHANG YP NG TS ZHENG GX SHENG JH WANG YQ
Citation
Yp. Zhang et al., RADIO PROPAGATION WITHIN COAL-MINE LONGWALL FACES AT 900 MHZ, Microwave and optical technology letters, 18(3), 1998, pp. 184-187
Citations number
3
Categorie Soggetti
Optics,"Engineering, Eletrical & Electronic
Journal title
Microwave and optical technology letters → ACNP
ISSN journal
08952477
Volume
18
Issue
3
Year of publication
1998
Pages
184 - 187
Database
ISI
SICI code
0895-2477(1998)18:3<184:RPWCLF>2.0.ZU;2-9
Abstract
Measurements of radio-wave propagation at 900 MHz within two longwall faces of a coal mine are reported. Variations of received power with d istance having distinct near and far regions separated by a breakpoint are observed. Values of propagation loss exponent and standard deviat ion before and after the breakpoint are derived for the two longwall f aces of the coal mine. It is shown that propagation undergoes great at tenuation. (C) 1998 John Wiley & Sons, Inc.