SATELLITE COMMUNICATION:
Modern satellite communication networks will employ frequencies above 10GHz. At these frequency bands, rain attenuation is the dominant fading mechanism.channel model, a synthesizer for generating rain attenuation time series for satellite links operating at 10GHz and above is presented. The proposed channel model modifies Maseng- Bakken (M-B) model since it generates rain attenuation time
series that follow the Weibull distribution
Fig : satellite communication
THE increasing demand for high data rate services and the scarcity of the spectrum lead to the employment of high frequency bands such as Ka and Q/V bands for the operation of satellite systems.
At operating frequencies above 10 GHz rainfall is the dominant fading mechanism since it causes the highest attenuation among the other atmospheric effects. Due to the high values of rain attenuation for small time percentage, though still critical for high availability systems, the adoption of a fixed power margin as a countermeasure of rain attenuation is not the optimal solution
An extended comparative test took place considering experimental data from ITUs database of Study Group 3 (DBSG3) in order to observe the suitability of Weibull distribution for modeling the rain attenuation exeedance probability. Considering 86 experiments from DBSG3 database it was found that the RMS value of the relative error was 13.47% for Weibull distribution and 13.8% for log normal distribution This leads to the conclusion that Weibull distribution in many cases may describe better rain attenuation exceed probability than log normal distribution. This is a strong motivation in order to derive a rain attenuation synthesizer based on Weibull distribution
FOR MORE DETAILS
CHANNEL MODEL FOR SATELLITE COMMUNICATION LINKS ABOVE 10GHZ BASED ON WEIBULL DISTRIBUTION
Modern satellite communication networks will employ frequencies above 10GHz. At these frequency bands, rain attenuation is the dominant fading mechanism.channel model, a synthesizer for generating rain attenuation time series for satellite links operating at 10GHz and above is presented. The proposed channel model modifies Maseng- Bakken (M-B) model since it generates rain attenuation time
series that follow the Weibull distribution
THE increasing demand for high data rate services and the scarcity of the spectrum lead to the employment of high frequency bands such as Ka and Q/V bands for the operation of satellite systems.
At operating frequencies above 10 GHz rainfall is the dominant fading mechanism since it causes the highest attenuation among the other atmospheric effects. Due to the high values of rain attenuation for small time percentage, though still critical for high availability systems, the adoption of a fixed power margin as a countermeasure of rain attenuation is not the optimal solution
An extended comparative test took place considering experimental data from ITUs database of Study Group 3 (DBSG3) in order to observe the suitability of Weibull distribution for modeling the rain attenuation exeedance probability. Considering 86 experiments from DBSG3 database it was found that the RMS value of the relative error was 13.47% for Weibull distribution and 13.8% for log normal distribution This leads to the conclusion that Weibull distribution in many cases may describe better rain attenuation exceed probability than log normal distribution. This is a strong motivation in order to derive a rain attenuation synthesizer based on Weibull distribution
FOR MORE DETAILS
CHANNEL MODEL FOR SATELLITE COMMUNICATION LINKS ABOVE 10GHZ BASED ON WEIBULL DISTRIBUTION
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