multi input-multi output (mimo) systems

In this paper, performance of communication channel a multiple-antenna high-altitude UAV (MIMO-HALE) with considering atmospheric conditions is analyzed. In this system, orthogonality between sub-channels is established with optimal placing antenna arrays (receiver and sender) and this result in achieving full rank channel and maximum capacity. In this paper, optimal capacity of the channel is mathematically analyzed and simulated by choosing a suitable model channel (statistical-geometrical), and considering the UAV flight parameters, in clear sky conditions and line-of-sight (LOS) channel The effect of rain is also simulated as one of the most important factors of atmospheric conditions on quality of channel and the change of capacity in high-altitude UAV with analysis outage capacity. In the following, statistical specifications (PDF, CDF) of received signal-to-noise ratio (SNR) and average symbol error rate (ASER) with MPSK Modulation is analyzed and simulated. Finally, simulations the results of simulations are compared with the analytical expressions to verify the exactness of the derived theoretical results.