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             ___     __   __     ___      _  __  
    ___     / _ \\   \ \\/ //   / _ \\   | |/ // 
   /   ||  / //\ \\   \   //   / //\ \\  | ' //  
  | [] || |  ___  ||  / . \\  |  ___  || | . \\  
   \__ || |_||  |_|| /_//\_\\ |_||  |_|| |_|\_\\ 
    -|_|| `-`   `-`  `-`  --` `-`   `-`  `-` --` 
     `-`

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Text this: SNR enhancement in OTDR using pulse coding