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             ___     _____     _    _    _    _   
  ____      / _ \\  |  __ \\  | || | || | \  / || 
 |    \\   | / \ || | |  \ || | || | || |  \/  || 
 | [] ||   | \_/ || | |__/ || | \\_/ || | .  . || 
 |  __//    \___//  |_____//   \____//  |_|\/|_|| 
 |_|`-`     `---`    -----`     `---`   `-`  `-`  
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發送短信 : Spectrum efficiency for log-normal shadowed Rician/Rician channels