أرسل هذا في رسالة قصيرة: Performance study of differential frequency hopping systems over a Rayleigh-faded channel in the presence of jamming

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