Research on Satellite-Ground Communication in Terahertz Massive Satellite Systems

Abstract

The explosive growth of the data traffic in future satellite communications can be leveraged by exploiting higher unlicensed spectrum band. In particular, Terahertz (THz) communication has been considered as a promising solution, since it can provide tens of GHz bandwidth. In addition, massive multiple input multiple output (MIMO) with a very large antenna array can be used in THz communications to provide large array gain to compensate for severe signal attenuation. To this end, this paper analyzes a terahertz MIMO channel modeling and simulation method for massive antenna array based satellite-ground communications. Taking into account the molecular absorption noise, transmission path loss, and molecular reradiation effects of the terahertz channels under a variety of typical weather models, we evaluate the bit error rates (BERs) for different frequencies, communication distances and signal strengths. Numerical results validate the feasibility of the proposed modeling approach.