scholarly journals A Comprehensive Review of the Site Diversity Technique in Tropical Region: Evaluation of Prediction Models Using Site Diversity Gain of Greece and India

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Fazdliana Samat ◽  
Mandeep Jit Singh ◽  
Aduwati Sali ◽  
Nasharuddin Zainal
Keyword(s):  
Prediction Models ◽  
Diversity Gain ◽  
Tropical Region ◽  
Comprehensive Review ◽  
Site Diversity ◽  
Diversity Technique ◽  
Of Greece

scholarly journals Analysis of rain fade mitigation using site diversity technique in southern tropical region of India

2017 ◽  
Vol 7 (1.1) ◽  
pp. 622 ◽  
Author(s):  
S Harika ◽  
S Nagarjuna ◽  
T V. Naveen ◽  
G Sanjay Harshanth ◽  
K Ch. Sri Kavya ◽  
...  
Keyword(s):  
Signal Strength ◽  
Tropical Region ◽  
Radio Waves ◽  
The Earth ◽  
Rain Drops ◽  
Geographical Position ◽  
Satellite Microwave ◽  
Site Diversity ◽  
Microwave Link ◽  
Diversity Technique

In order to design a reliable earth to satellite microwave link at certain frequencies in tropical region due to multi propagation we come across fading which means variation of attenuation of a signal with time, geographical position and radio frequency. The radio waves propagating through the earth atmosphere is attenuated due to the presence of atmospheric particles such as water vapor, rain drops and the ice particles which absorb and scatter the radio waves and consequently degrade the performance of the microwave link and there is probability of loss of signal strength, to mitigate this problem Site Diversity Technique is used from the different Fade Mitigation Techniques. The analysis of Site Diversity Gain Model based on the measured rainfall data has been done.  

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 Performance Analysis of Polarization Diversity for Indoor Scenarios at 41.4 GHz and 61.5 GHz

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Ana Vazquez Alejos ◽  
Manuel Garcia Sanchez ◽  
Iñigo Cuiñas
Keyword(s):  
Radio Channel ◽  
Maximal Ratio Combining ◽  
Diversity Gain ◽  
Orthogonal Polarization ◽  
Mobile System ◽  
Combination Technique ◽  
Combination Methods ◽  
Indoor Scenarios ◽  
Signal Fading ◽  
Diversity Technique

We present the radio channel experiments conducted in indoor scenarios to test the performance of a dual orthogonal polarization scheme in the single-branch receiver end of a mobile system with a centre frequency of 41.4 GHz and 61.5 GHz. The diversity gain has been obtained according to three main combination methods for an outage probability of 1%: signal selection, equal gain combining, and maximal ratio combining. Diversity gain calculated ranges from 0.25 to 4.5 dB, depending on the combination technique used, the radiation pattern, the scenario, and the frequency band. The spatial variation of the cross-polar discrimination factor (XPD) has been estimated. The XPD ranges from 31 dB to 34 dB at 41.4 GHz and between 26 dB and 29 dB for the 61.5 GHz band. From the gain and discrimination results, we evaluated the performance of this scheme to conclude its suitability as either a diversity technique for reducing signal fading, as the 41.4 GHz, or as a method for increasing the link capacity in the 61.5 GHz case.

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