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  _____      ___     ______    __   __   __   __  
 / ____||   / _ \\  |      \\  \ \\/ //  \ \\/ // 
/ //---`'  / //\ \\ |  --  //   \ ` //    \   //  
\ \\___   |  ___  |||  --  \\    | ||     / . \\  
 \_____|| |_||  |_|||______//    |_||    /_//\_\\ 
  `----`  `-`   `-` `------`     `-`'    `-`  --`

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發送短信 : Symbol-error performance and bit-error performance of QAM signalling