Research on Calculation Method of VSAT Satellite Link for Oil and Gas Pipeline
In order to solve the problem that the VSAT satellite link calculation depends entirely on the satellite manufacturer and cannot check whether the data provided by the manufacturer is correct,and to improve the reliability and robustness of VSAT satellite link calculation,a calculation method for oil and gas pipeline VSAT satellite link is proposed.The method uses the algorithm of"power band bal-ance",and equivalent the bandwidth occupancy ratio of VSAT satellite links to the power occupancy ratio,calculating the maximum output power of the satellite transponder,then the equivalent power density is calculated.The saturated flux density is calculated according to the ERIP value formula of the satellite occupied by each carrier,and the satellite antenna size and power amplifier matrix are matched.The total carrier to noise ratio of the VSAT satellite link is calculated based on the matched satellite an-tenna and power amplifier,and the total carrier-to-noise ratio of the VSAT satellite link is compared with the lowest carrier-to-noise ratio of the system.The one with the higher total carrier-to-noise ra-tio of the VSAT satellite link is the appropriate satellite antenna and power amplifier,while the other is the unsuitable option.The calculated satellite antenna and power amplifier are used to calculate the pow-er occupancy ratio,if there is a significant difference between the power occupancy ratio and the band-width occupancy ratio,it is necessary to adjust the selection of satellite antenna and power amplifier and calculate the power occupation ratio until the power occupation ratio of satellite antenna and power am-plifier is equal to the bandwidth occupation ratio,which is the optimal satellite antenna and power am-plifier.Through the final calculation,the matching matrix of satellite antenna and power amplifier can be obtained,and the minimum value of suitable satellite antenna and power amplifier should be selected in practical engineering,which is the most economical and reliable matching.The method is visualized by software programming and verified in many engineering applications.The results show that the pro-posed method is accurate and reliable,which greatly improves the reliability and robustness of VSAT satellite link calculation.
power band balancesatellite linkantenna sizepower amplifiereffective isotropic ra-diated powersaturated power flux density
NETL
NSTL
万方数据
