أرسل هذا في رسالة قصيرة: BIT ERROR PROBABILITIES OF BDPSK, PI/2-BDPSK, QDPSK, AND PI/4-DQPSK OVER THE FREQUENCY NONSELECTIVE RICIAN FADING CHANNEL

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