A.{0,-1,0,1}B.{1,-2,-3,-4}C.{0,-2,-3,-4}D.{1,-1,0,1}
A.連續(xù)傅里葉變換B.連續(xù)傅里葉級數(shù)C.離散傅里葉變換D.離散傅里葉級數(shù)
A.2f1B.2f2C.4f1D.4f2