Based on the requirements of rapid and low cost construction for large-scale satellite constellation construction, combined with the characteristics of high-speed, small size and low power consumption of space laser communication, satellite to ground and satellite to satellite full link laser communication constellation is designed, the communication system and wavelength were analyzed and selected, and key technologies for space-based laser transmission were proposed to address issues such as weather impact, rapid acquisition, and high-precision pointing in satellite to ground laser link communication, providing reference for large-scale satellite constellation design.
The plasma sheath around the hypersonic vehicle is affected by the turbulence. Random changes in electron density disrupt
magnitude of electromagnetic wave so that communication quality become worse. This paper focuses on the statistics of
the electron density, and statistical models of electromagnetic wave amplitude at Ka band is obtained by the
electromagnetic calculation. Finally, the influence of electron density and radio frequency on the mean and variance of
transmission coefficient is studied. The results show that, with the increase of the electron density, the amplitude of the
transmission coefficient decreases, and the variance increases. With the increase of the frequency of the radio wave, the
amplitude of the mean is increasing and the variance is decreasing.
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