Study Of Attenuation And Depolarization In Ka Waves Band Along Earth-space Path And Power Control Algorithm

In this paper, the effects of attenuation and depolarization induced by sand-dust storms onKa waves band electromagnetic waves propagation along horizontal paths are discussed on thebasis of the medium sphere scattering theory. And based on experience models which are appliedin the condition of low height, the effective models of attenuation and XPD due to sand-duststorms on Ka waves band electromagnetic waves propagation along earth-space paths are given,and results obtained are simulated. Using for reference the depolarization and rain attenuationprediction models are analyzed and the results are simulated by connecting the parameters ofJapan's satellite with measuring data of 58 China main earth-station. And the frequent attenuationscale ration formula is derived. On the basis of open-loop control algorithm, the LMS algorithm isused to cancel the time delay, and the result of this algorithm is simulated in the MATLABsoftware. The effect of attenuation and depolarization on digital system is investigated, and thecorrelation formula was derived. At last, the technology about cancel the effect of depolarizationwas discussed. he results obtained are of great value in the overall design of satellite systems onKa waves band.