發送短信 : Optimal family of q-ary codes obtained from a substructure of generalised Hadamard matrices

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