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  _____    __   __               ___     _    _   
 / ____||  \ \\/ //     ___     / _ \\  | |  | || 
/ //---`'   \ ` //     /   ||  / //\ \\ | |/\| || 
\ \\___      | ||     | [] || |  ___  |||  /\  || 
 \_____||    |_||      \__ || |_||  |_|||_// \_|| 
  `----`     `-`'       -|_|| `-`   `-` `-`   `-` 
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Text this: Semi-blind channel estimation for space-time coded amplify-and-forward relay networks