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  ______    _____   __    __     ___     _    _   
 /_____//  |  ___|| \ \\ / //   / _ \\  | || | || 
 `____ `   | ||__    \ \/ //   / //\ \\ | || | || 
 /___//    | ||__     \  //   |  ___  ||| \\_/ || 
 `__ `     |_____||    \//    |_||  |_|| \____//  
 /_//      `-----`      `     `-`   `-`   `---`   
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Text this: Blind channel estimation for OFDM systems via a general non-redundant precoding