Warning: mysql_numrows(): supplied argument is not a valid MySQL result resource in /home/kidsnetau/encyclopedia_content.txt on line 11

Encyclopedia > Shannon's law

  Article Content

Shannon's law

In telecommunication, a Shannon's law is a statement defining the theoretical maximum rate at which error-free digits can be transmitted over a bandwidth-limited channel in the presence of noise, usually expressed in the form C = W log2(1 + S /N ), where C is the channel capacity in bits per second, W is the bandwidth in hertz, and S /N is the signal-to-noise ratio in db.

Note: Error-correction codes can improve the communications performance relative to uncoded transmission, but no practical error correction coding system exists that can closely approach the theoretical performance limit given by Shannon's law.

Source: from Federal Standard 1037C and from MIL-STD-188



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Washington Institute for Values in Public Policy

... Its staff director was Jonathan Slevin. [3] (http://www.nicheventures.com/newpage4.htm) The Science and Environmental Policy Project was founded by S. Fred Singer as ...