Study on Radio Link Availability in Millimeter Wave Range

In this paper, the link quality in SHF and EHF ranges are studied. In order to achieve high data rate higher frequencies must be used – centimeter waves (SHF), millimeter waves (EHF) or optical range. However, there are significant problem when a radio link work in that diapason – rain attenuation and attenuation in earth-s atmosphere. Based on statistical rain rates data for Bulgaria, the link availability can be determined, depending on the working frequency, the path length and the Power Budget of the link. For the calculations of rain attenuation and atmosphere-s attenuation the ITU recommendations are used.

Authors:

• Boncho G. Bonev
• Kliment N. Angelov
• Emil S. Altimirski

Keywords:

• rain attenuation
• atmospheric gaseous attenuation
• link availability
• link breaking probability

References:

[1] A. Kato, K. Sato, M. Fujise, and S. Kawakami, "Propagation
characteristics of 60-GHz millimeter waves for ITS intervehicle
communications," IEICE Transactions on Communications, vol. E84-B,
no. 9, pp. 2530-2539, 2001.
[2] V. Kvicera, M. Grabner, and O. Fiser, Results of 2-year concurrent
measurements of attenuation at 58 GHz and rain intensities, Proc. of
the 11th Microcoll Conference, pp. 77-80, Budapest, Hungary, Sept.
2003.
[3] V. Kvicera and M. Grabner, Results of long-term concurrent
measurement of rain rate and rain attenuation at 38 GHz, Proceedings
of 2002 URSI General Assembly, Maastricht, Netherlands, 17-24 August
2002.
[4] Kim, E. Korevaar, Availability of free-space optics (FSO) and hybrid
FSO/RF systems, SPIE Vol. 4530, p. 84-95, Optical Wireless
Communications IV, Eric J. Korevaar; Ed., November 2001.
[5] J. Seybold, Introduction to RF propagation, John Wiley & Sons Inc.,
Hoboken, New Jersey, 2005.
[6] R. L. Freeman, Radio System Design for Telecommunications, John
Wiley & Sons Inc., Hoboken, New Jersey, 2007.
[7] Rec. ITU-R P.838-3, Specific attenuation model for rain for use in
prediction methods.
[8] Rec. ITU-R P.676-6, Approximate estimation of gaseous attenuation in
the frequency range 1 - 350 GHz.