In the interior of spacecraft,short-distance wireless transmission,as an alternative to traditional wired transmission,is attracting more and more attention. This paper aims at the engineering practice of spacecraft design.First,through the analysis of the application background of spacecraft short-distance wireless transmission,three common application scenarios are summarized. Then,the space electromagnetic field and the channel characteristics of spacecraft in different scenarios are analyzed qualitatively,and a variety of physical layer transmission technologies suitable for the short-distance wireless transmission of spacecraft are proposed. Moreover, the advantages,disadvantages,and respective application scenarios of several key technologies are analyzed comparatively. Finally,based on the analysis of the system transmission delay,a reasonable control method is proposed to avoid the abnormality of the system caused by the increase in the transmission delay. The proposed method provides a feasible design idea and basis for the follow-up design for the spacecraft short-distance wireless transmission system.
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