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

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發送短信 : Mã lưới cho kênh Fading Rayleigh