Performance of MIMO system in Weibull fading channel - Channel capacity analysis

In this paper we investigate the performance of a transmit antenna selective multiple-input multiple-output (MIMO) (this is the proposed system), full complexity MIMO and single-input single-output (SISO) systems all operating under Weibull fading. The effect of increasing the number of antennas together with applying maximal-ratio combining (MRC) on the signal-to-noise ratio is studied. SNR is shown to increase with an increase in the number of antennas used, and this in turn increases the channel capacity. The system performance in terms of the channel capacity is also studied. We show that the average channel capacity can be increased by increasing the fading parameter. Increasing the fading parameter leads to a decrease in the severity of fading, meaning that signals can be decoded with reduced probability of error. We also show that the proposed transmit antenna selective MIMO and the full complexity MIMO systems outperform the single-input single-output (SISO) system in terms of channel capacity.