Development and performance evaluation of tropospheric scintillation model on Ku-band satellite link over Akure, Nigeria

Geo-spatial distribution of radio refractivity and the influence of fade depth on microwave propagation signals over Nigeria

“…The degree of signal distortion caused by the multipath intermittent attenuation of a microwave link is needed to establish a credible land-based link. It has been established that multipath fading is a random phenomenon that can only be described statistically (Olsen et al, 2003;Grami, 2016;Ashidi et al, 2020). On the basis of path lengths, fading phenomena can be predicted at a defined value of fade level or calculated at a specific percentage of outages.…”

Evaluation of Concurrent Variation in Rain Specific Attenuation and Tropospheric Amplitude Scintillation Over Akure, Southwest Nigeria

“…The cause of tropospheric scintillation can be adduced to small-scale refractive index inhomogeneity, induced by turbulence along the channel of propagation, which results in the received signal amplitude and phase experiencing rapid fluctuations (Haddon and Vilar 1986;Karasawa and Matsudo 1991;Hossain and Samad 2017). Above 10 GHz, intensity of scintillation within the troposphere is reputed to vary directly with carrier frequency and inversely with elevation angle and antenna diameter (Omotosho et al 2016;Ashidi et al 2021). Fading due to scintillation also poses major challenge to the performance of low-margin communication systems, whose availability over a long period of time is sometimes more predominantly governed by scintillation mechanism than rain attenuation.…”

“…However, only few works on tropospheric amplitude scintillation have been reported from Nigeria due to dearth of data, these include but not limited to-characterization of Ku-band amplitude scintillation on Earth-space path over Published in partnership with CECCR at King Abdulaziz University Akure, SW Nigeria (Ashidi 2020;Ashidi et al 2017Ashidi et al , 2020Ashidi et al , 2021, experimental analysis and comparison of tropospheric scintillation prediction models in tropical Nigeria (Ojo et al 2018), analysis and comparison of tropospheric scintillation prediction models at Covenant University (Akinwumi et al 2018), and prediction of tropospheric scintillation over some selected locations in Nigeria (Adebo and Akindugbagbe 2019). Locally, no study has been reported on the concurrent evaluation of rain attenuation with amplitude scintillation.…”