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

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Text this: Amplify-and-forward based two-way relay ARQ system with relay combination