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

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Text this: Joint user pairing and subchannel allocation for multisubchannel multiuser nonorthogonal multiple access systems