أرسل هذا في رسالة قصيرة: Channel estimation and synchronization for OFDM and OFDMA systems

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