scholarly journals Rain attenuation prediction for 5G communication links in Minna, Nigeria

2021 ◽  
Vol 2034 (1) ◽  
pp. 012028
Author(s):  
E C Ibekwe ◽  
K C Igwe ◽  
J O Eichie
Keyword(s):  
Rain Attenuation ◽  
Communication Links ◽  
5G Communication

scholarly journals Analysis of Time Diversity Gain for Satellite Communication Link based on Ku-Band Rain Attenuation Data Measured in Malaysia

2018 ◽  
Vol 8 (4) ◽  
pp. 2608
Author(s):  
Islam Md. Rafiqul ◽  
Ali Kadhim Lwas ◽  
Mohamed Hadi Habaebi ◽  
Md Moktarul Alam ◽  
Jalel Chebil ◽  
...  
Keyword(s):  
Satellite Communication ◽  
Satellite Communications ◽  
Earth Satellite ◽  
Rain Attenuation ◽  
Diversity Gain ◽  
Communication Link ◽  
Time Diversity ◽  
Communication Links ◽  
System Time ◽  
Diversity Technique

<p><span>This paper reports a study on mitigation of propagation impairments on Earth–space communication links. The study uses time diversity as a technique for mitigating rain propagation impairment in order to rectify rain fade. Rain attenuation time series along earth-to-satellite link were measured for two years period at 12.255 GHz in Malaysia. The time diversity technique was applied on measured rain fade to investigate the level of possible improvement in system. Time diversity gain from measured one-minute rain attenuation for two years period was estimated and significant improvement was observed with different delays of time. These findings will be utilized as a useful tool for link designers to apply time diversity as a rain fade mitigation technique in Earth-satellite communications systems.</span></p>

scholarly journals Rainfall eld reconstruction using rain attenuation of microwave mesh networks

1970 ◽  
Vol 7 (2) ◽  
pp. 117-125
Author(s):  
Gemalyn Dacillo Abrajano ◽  
Minoru Okada
Keyword(s):  
Compressed Sensing ◽  
Weather Forecasting ◽  
Mesh Networks ◽  
Detection System ◽  
Rain Attenuation ◽  
Detection Accuracy ◽  
Reconstruction Method ◽  
Weather Patterns ◽  
Communication Links ◽  
Rain Events

Rainfall detection using commercial communication links can complement the existing weather satellite and radar system. Using the rain attenuation data from these networks, the paper proposes a new method of reconstructing the rainfall field through a compressed-sensing based algorithm. Compressed sensing is a new algorithm that can reconstruct a sparse signal from a relatively small number of measurements. System configurations of two links and three links crossing a single area are studied and the detection accuracies for rain location and attenuation level are evaluated. The proposed method is also tested for different climate and weather patterns. The results show that the proposed method has good location detection accuracy, and the rain intensity was reconstructed as well. The proposed detection system and reconstruction method can greatly benefit the tropical countries that experience frequent rains but do not have enough resources for weather forecasting and detection of possible disaster-inducing rain events.

Rain Height Statistics from Spaceborne Radar for Satellite Communication in Malaysia

2012 ◽  
Vol 58 (1) ◽  
Author(s):  
Nor Azlan Mohd Aris
Keyword(s):  
Satellite Communication ◽  
Tropical Rainfall Measuring Mission ◽  
Rain Attenuation ◽  
Peninsular Malaysia ◽  
Equatorial Region ◽  
Radiowave Propagation ◽  
Tropical Region ◽  
Propagation Modeling ◽  
Bright Band ◽  
Communication Links

Tropical and equatorial region exhibit significantly higher rainfall compared to the temperate region leading to higher attenuation for satellite communication links. One of the issues in radiowave propagation modeling is the different precipitation structures which play an important role in the estimation of rain fade. However, few results on rain height over Malaysian equatorial stations have been presented so far. To this aim, an investigation on rain height derived from Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) is carried out. In this paper, the bright–band heights (hBB) have been analyzed to obtain monthly average values of the rain height (hR). TRMM PR is one of the most powerful instruments able to observe vertical profiles of rainfall. The analysis covers stratiform events around peninsular Malaysia. It is well known that hBB exists slightly below the 0°C isotherm height (h0) and this may lead to the estimation of rain height (hR). The obtained results on rain height are then compared with radiosonde observations and ITU–R Recommendation P.839–3. It is found that the bright–band height (hBB) appears to vary throughout the year and will mostly lie between 4192 m and 4593 m above mean sea level. The results suggest that by carefully consider the physical information of rain height derived from the various local databases should lead to substantial improvements in the rain attenuation prediction accuracy for equatorial and tropical region.

scholarly journals Bistatic Scattering due to Hydrometeors on Cochannel Intersystem Communication Links over a Subtropical Path

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
P. A. Owolawi ◽  
T. Wallingo
Keyword(s):  
Transmission Loss ◽  
Cell Model ◽  
Satellite System ◽  
Rain Attenuation ◽  
Small Time ◽  
Satellite Systems ◽  
Satellite Design ◽  
Interference Level ◽  
Communication Links ◽  
Downlink Signal

The performance of fixed satellite systems in the shared frequency band depends on the tolerance level of interference between them. Interference disturbs the functionality of the ground station and causes signal degradation. The knowledge of interference level must therefore be known for an optimal satellite design. In this work, we evaluate interference due to hydrometeors for a situation in which a satellite downlink signal is affected by the signal from a terrestrial microwave network operating at the same frequency as the satellite system in a subtropical station: Durban, South Africa. The evaluation of the transmission loss is based on the modified 3D bistatic radar equation and the exponential rain cell model for the scattering. The results of intersystem interference for different station separation over frequencies variation, terrestrial antenna gains, and exceedance probabilities are presented. The effect of the additional rain attenuation(Aw)on the satellite signals is also examined. The results point out to some remarkable attenuation differences between the effective transmission loss and the transmission loss statistics for small time unavailability at the frequencies considered in this work. This could be detrimental in link budget design if overlooked.

scholarly journals Comparison of Measured Rain Attenuation in the 12.25 GHz Band with Predictions by the ITU-R Model

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Dong You Choi ◽  
Jae Young Pyun ◽  
Sun Kuh Noh ◽  
Sang Woong Lee
Keyword(s):  
Quantitative Analysis ◽  
Prediction Models ◽  
Rain Attenuation ◽  
Efficient Design ◽  
Wet Season ◽  
Communication Links ◽  
Rain Events

Quantitative analysis and prediction of radio attenuation is necessary in order to improve the reliability of satellite-earth communication links and for economically efficient design. For this reason, many countries have made efforts to develop their own rain attenuation prediction models that are suited to their rain environment. In this paper, we present the results of measurements of rain-induced attenuation in vertically polarized signals propagating at 12.25 GHz during certain rain events, which occurred in the rainy wet season of 2001 and 2007 at Yong-in, Korea. The rain attenuation over the link path was measured experimentally and compared with the attenuation obtained using the ITU-R model.

Sign in / Sign up

Export Citation Format

Share Document