Information Theory and Coding > Channel Capacity > What is Channel in information theory?

A channel is any source of noise, for example a wireless link, an error prone storage device, an IP network with the potential for packet loss, etc. There exist a probability related to a channel is a conditional distribution p(Y |X) i.e. probability of having output Y when the input was X.  This quantity p(Y|X) is called channel transition probability that may has the memoryless properties if p(Y|X) is independent of outputs in previous timesteps.

No More

Next

What is information channel?

Feedback

Submit