Ingeniería ISSN Impreso: 1409-2441 ISSN electrónico: 2215-2652

Estimation of Frequencies for National Shortwave Network with Automatic Link Establishment Equipment

José Raúl Machado Fernández, Yoanne Lorenzo Rodríguez, Yaser Gutiérrez Vázquez, David León Rosich



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.

Palabras clave

HF Propagation; Frequency Prediction; ALE; Short Wave Links; VOACAP

Texto completo:

PDF (English)


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:


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:


lecommunication union (ITU). Standard, Interoperability and Performance Standards for Medium and High Frequency Radio Systems; 2011 [visited 2014 May]. pp 584. Available at:

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:

VOACAP software official website [Web Site]. 2013 [visited 2014 March]. Available at:

Predictions on sunspots [Web Site]. 2014 [visited 2014 May]. Available at:

Enlaces refback

  • No hay ningún enlace refback.

© 2017 Universidad de Costa Rica. Para ver más detalles sobre la distribución de los artículos en este sitio visite el aviso legal. Este sitio es desarrollado por UCRIndex y Open Journal Systems. ¿Desea cosechar nuestros metadatos? dirección OAI-PMH: