Derived Specific Rain Attenuation at Stand-Alone Milimeter WaveBands for Samaru Zaria, Nigeria

Abstract

This work studies rain–induced effect on some envisaged 5G links located at Samaru Zaria,
Kaduna State, Nigeria, operating at 26 GHz, 38 GHz and 42 GHz in a MATLAB
environment; using 3–year rain data obtained from Em60G™ datalogger–powered
metrological setup of the Nigerian Metrological Agency (NiMet) located at Ahmadu Bello
University, Zaria. Lavergnat and Gole (LG) model was used to derive the 1–minute rain
rate statistics while monthly and annual cumulative distributions for both the rain gauge’s
60–minute and the derived 1–minute rain rate statistics were comparably presented. The 1–
minute rain rate curve was fitted into both Lognormal and Gamma distributions to
approximate the low and high rainfall rates respectively, which was then used to derive the
rain attenuation statistics using the Power–Law model. The specific rain attenuation for
0.001% exceedance probability was found to be 1.117 dB/km at 26 GHz, 2.698 dB/km at 38
GHz and 3.245 dB/km at 42 GHz. Similarly, for 0.01%, it was found to be 0.842 dB/km,
1.898 dB/km and 2.278 dB/km at 26 GHz, 38 GHz and 42 GHz respectively. Furthermore,
for 0.1%, it was found to be 0.842 dB/km, 1.898 dB/km and 2.278 dB/km at 26 GHz, 38 GHz
and 42 GHz respectively. Lastly, for 1%, it was derived to be 0.754 dB/km at 26 GHz, 1.698
dB/km at 38 GHz and 2.026 dB/km at 42 GHz.