# Channel Capacity

Definitions   ::   Symmetric Channels   ::   Closer Look   ::   Typical Sequences   ::   Theorem

## Channel Capacity Definition and Examples

We are now ready to talk about the fundamental concept of the capacity of a channel. This is a measure of how much information per channel usage we can get through a channel.

The channel capacity has the following properties:

1. . (why?)
2. . (why?)
3. .
4. I ( X ; Y ) is continuous function of p ( x ).
5. I ( X ; Y ) is a concave function of p ( x ). (It has a maximum)
Citation: admin. (2006, May 15). Channel Capacity. Retrieved January 07, 2011, from Free Online Course Materials — USU OpenCourseWare Web site: http://ocw.usu.edu/Electrical_and_Computer_Engineering/Information_Theory/lecture8_1.htm.