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| \  / ||  /_   _//  /_   _//  \ \\/ // | || | || 
|  \/  ||   -| ||-   `-| |,-    \ ` //  | '--' || 
| .  . ||   _| ||_     | ||      | ||   | .--. || 
|_|\/|_||  /_____//    |_||      |_||   |_|| |_|| 
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Text this: A time and frequency synchronization method for CO-OFDM based on CMA equalizers