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 ______    __   __    ______   _    _     ____    
|      \\  \ \\/ //  /_   _// | || | ||  |  _ \\  
|  --  //   \ ` //   `-| |,-  | || | ||  | |_| || 
|  --  \\    | ||      | ||   | \\_/ ||  | .  //  
|______//    |_||      |_||    \____//   |_|\_\\  
`------`     `-`'      `-`'     `---`    `-` --`

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發送短信 : QPSK communication between two nodes using USRP