# Capacity Of Channel

It is defined as maximum data rate that can be supported by channel with minimum probability of error.

Let a channel has bandwidth â€˜Bâ€™ and additive Gaussian band limited white noise is â€˜Nâ€™, then capacity of channel is given by

bits/sec

This equation is called Shanon Hartley Theorem. When the bandwidth tends to infinity then capacity of channel does not tends to infinity as  tends to zero because of high noise power. So,