Cómo citar
Resumen
Transmission over High Frequency (HF) is a very important alternative to the wired communication. Though it offers narrow bandwidths, long distances are reachable with it so the mechanism is commonly used as a backup connection for exceptional situations. The Automatic Link Establishment (ALE) technique is a new solution that tries to release the HF operators from the arduous task of finding the most favored communication frequency. Recently, a wireless HF network based on ALE has been proposed for interconnecting the western, central and eastern Cuban regions with the Havana capital city. While the technology ensures high stability in communications, it requires the a priori configuration of a frequency set for each established link. Authors of the present paper use the VOACAP software to predict the ten optimal communication frequencies for the period 2014 - 2018, in an analysis that allows the adaptation of the chosen set in an annual or monthly basis, depending on user needs. The results are also compared with estimates for the years 2012 and 2013, completing thus the progression analysis of the general behavior and its dependence on ionospheric conditions.
Citas
National Telecomications and Information Administration (NTIA); Institute for Telecomunications Sciences (ITS). High Frequency Radio Automatic Link Establishment (ALE) Application Handbook; 1998 [visited 2014 June]. pp 303. Available at: http://www.n2ckh.com/MARS_ALE_FORUM/NTIA_HIGH_FREQUENCY_ALE_
RADIO_APPLICATION_HANDBOOK.pdf
Hernando Rabanos J M. Transmisión por Radio. 6th edition. Spain: Editorial universitaria Ramón Areces, 2008, pp. 643. ISBN: 978-84-8004-856-9.
Richards J A. Radio Wave Propagation An Introduction for the Non Specialist. 6th edition. Germany: Springer; 2008, pp. 131. ISBN: 978-3-540-77124-1.
Seybold J. Introduction to RF propagation. United States: Wiley-Interscience; 2005, pp. 348. ISBN: 978-0-471-65596-1.
Schunk R. Ionospheres Physics, Plasma Physics, and Chemistry. United Kingdom: Cambridge University Press; 2009, pp. 642, ISBN-13: 978-0-511-63489-5.
Haslett C. Essentials of Radio Wave Propagation. United Kingdom: Cambridge University Press, 2008, pp. 215, ISBN-13: 978-0-511-37112-7.
Lorenzo Rodríquez Y, Gutiérrez Vázquez Y. Establecimiento Automático del Enlace (ALE) como solución a las Comunicaciones por Onda Corta en Cuba [Tesis]. La Habana, Cuba: Instituto Superior Politécnico José Antonio Hecheverría. Facultad de Ingeniería; 2014.
Machado Fernández J R, Gutiérrez Vázquez Y, Lorenzo Rodríquez Y, León Rosich D. Propuesta de Red Nacional de Onda Corta en Cuba empleando equipamiento de Establecimiento Automático del Enlace. Ciencias Holguín. 2015 Enero-Marzo, ISSN: 1027-2127.
Balanis, C. Modern Antenna Handbook. United States: John Wiley & Sons; 2008, ISBN: 978-0-470-03634-1.
Ornetta V C. Diseño y fabricacion de una antena logaritmica periodica 200-1000 MHz [Tesis]. Perú: Universidad San Marcos. Facultad de ingeniería; 2005.
ICOM. IC-F8100 HF Transceiver Instruction Manual; 2011 [visited 2014 June]. pp 60. Available at: http://www.icomuk.co.uk/files/icom/PDF/productManual/IC-F8100_um.pdf
INTERNATIONAL TELECOMMUNICATION UNION (ITU). International Te-
lecommunication union (ITU). Standard, Interoperability and Performance Standards for Medium and High Frequency Radio Systems; 2011 [visited 2014 May]. pp 584. Available at: http://hflink.com/standards/ALE_standard_188_141B.pdf
Ramírez Castelan J R. Implementacion de la recomendacion UIT-R 533 para la prediccion de frecuencias en HF [Tesis]. México: Escuela Superior de Ingeniería Mecánica y Eléctrica Zacatenco; 2010.
International Telecommunication Union (ITU). VOACAP, propagation analysis and prediction program; 2012 [visited 2014 June]. Availble at: http://www.astrosurf.com/luxorion/qsl-soft-voacap.html
VOACAP software official website [Web Site]. 2013 [visited 2014 March]. Available at: www.voacap.com
Predictions on sunspots [Web Site]. 2014 [visited 2014 May]. Available at:
www.ips.gov.au