Abstract
A wireless channel suffers from two fundamental impairments; fading and
noise. While fading is multiplicative, noise is additive. It is
well-known that higher the noise, lower is the signal to noise ratio and
lower the capacity. However, fading can be helpful in increasing the
capacity when using multiple transmit and receive antennas. In this
paper, we give an intuitive explanation for this. Anybody with a
background in linear algebra and matrices can understand this.Â