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Global hop length analysis for millimeter-wave radio links

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Abstract

For the CCIR 14-rain climatic zones of the globe, we present a simplified hop length versus fade margin analysis with link reliability as a parameter. The analysis uses Laws-Parsons values for the a and b parameters of A(dB/Km)=a Rb (mm/hr), and considers the two cases of (i) limited rain-cell and (ii) “entire hop in rain”.

The result is a family of fade margin vs. hop length curves for various reliability objectives, obtained for each of the 14-rain zones at a frequency of 50 GHz. A simple frequency scaling rule is also devised to enable similar analysis at frequencies in the range 30–70 GHz.

It is particularly concluded that an extended hop length of 10–20 Km is possible with reasonable reliability if the reduced cell-size concept is applied. If the entire hop is in rain, a limited hop length of one to five kms can't be exceeded even with modest reliability. It is also demonstrated that high resolution global rain map, together with an accurate cell size definition are mandatory for reliable radio link design at mm-wave lengths.

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References

  1. R.L. Freeman, Telecommunication Transmission Handbook, John Wiley, Chapter 10, 1981.

  2. A.A. Ali, M. Hassan and M.A. Alhaider, “Experimental Studies of Terrestrial mm-Wave Links — A Review, Part 1: Attenuation Due to Atmospheric Particles” Journal of Eng. Science, King Saud Univ. Vol. 12 (2), pp. 197–212, 1986.

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  3. Adel A.Ali, “Reliability Analysis of Millimeter Wave Propagation Based on Long Term Rain Data in Riyadh”, Int. J. of IR & mm-Waves, Vol. 7, No. 3, pp 339–356, 1986.

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  4. CCIR, “Recomendations and Reports of the CCIR”, CCIR Rep. 563-2, Geneva, 1982.

  5. CCIR, “Recomendations and Reports of the CCIR”, CCIR Rep. 563-1, Geneva, 1978.

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Authors and Affiliations

  1. College of Engineering, King Saud University, 11421, Riyadh, Saudi Arabia

    Adel A. Ali, Ibrahim A. Al-Kadi & Mohammad K. Samarkandy

Authors
  1. Adel A. Ali
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  2. Ibrahim A. Al-Kadi
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  3. Mohammad K. Samarkandy
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Ali, A.A., Al-Kadi, I.A. & Samarkandy, M.K. Global hop length analysis for millimeter-wave radio links. Int J Infrared Milli Waves 8, 1097–1113 (1987). https://doi.org/10.1007/BF01010814

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  • DOI: https://doi.org/10.1007/BF01010814

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