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  _____     ______   _    _     ______   _    _   
 |__  //   /_   _// | |  | ||  /_   _// | \  / || 
   / //     -| ||-  | |/\| ||   -| ||-  |  \/  || 
  / //__    _| ||_  |  /\  ||   _| ||_  | .  . || 
 /_____||  /_____// |_// \_||  /_____// |_|\/|_|| 
 `-----`   `-----`  `-`   `-`  `-----`  `-`  `-`

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Text this: Impact of channel knowledge on cognitive radio system capacity