Performance of MIMO VBLAST-OFDM in Ka-Band

Technological advances have allowed the use of Ka-band for transmission in 30 GHz uplink and 20 GHz at downlink. The use of Ka-band has advantages over lower frequency bands; it allows a wider bandwidth and therefore a greater flow to pass. In addition, multi-beams technology allows a wide reuse frequency, thereby reducing significantly the cost of the spectrum. In this Ka-band (20-30 GHz), quality of service can be degraded by the effects of effects of propagation through the atmosphere. The authors have proposed in this paper the MIMO OFDM-VBLAST technique for Ka-band application to improve performance. The simulation is based on the study of effect of the channel attenuation (rain and gas) in the Ka-band signal.