Research on Mars Communication Link Budget

Abstract

Abstract. This paper presents the budget method of the Mars-earth communication link. The calculation models of Mars atmosphere loss, Mars sandstorm loss, solar scintillation loss, earth atmosphere absorption; rainfall loss and hot body noise are studied. The propagation characteristics of electromagnetic waves in Mars atmosphere are analyzed and modeled by the characteristics of the propagation of analogous waves in the Earth's atmosphere. Ultimately, we found that the surface of the radio waves propagation environment is ideal, with less attenuation loss. Especially, the calculate model of solar scintillation loss and rainfall loss is simulated, and the simulation results are consistent with the actual statistical results, which proves the rationality of the calculate model. At last, an example of Mars-earth communication link budget is given. With the procedure, we can get one of the most important parameters of the link--Carrier to Noise Ratio, and we know the bit signal to noise ratio required by the right BER, then the maximum code rate of the link can be got. This paper has some reference to the design of Mars communication link.

Comparison of the influence of Martian and Earth's atmospheric environments on terahertz band electromagnetic waves

“…In the near‐Mars environment, the terahertz link is mainly affected by the Martian atmosphere and dust storms 7 . The current research on the radio propagation characteristics in the Martian environment is mostly in the UHF/S/X/Ka bands, but there is almost no research in the terahertz band.…”