發送短信 : Space-time trellis coding in wireless communications

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