| 摘要 |
A METHOD FOR TRANSFORMING A DIGITAL SIGNAL FROM THE TIME DOMAIN INTO THE FREQUENCY DOMAIN AND VICE VERSA USING A TRANSFORMATION FUNCTION COMPRISING A TRANSFORMATION MATRIX, THE DIGITAL SIGNAL COMPRISING DATA SYMBOLS WHICH ARE GROUPED INTO A PLURALITY OF BLOCKS, EACH BLOCK COMPRISING A PREDEFINED NUMBER OF THE DATA SYMBOLS. THE METHOD INCLUDES @THE PROCESS OF TRANSFORMING TWO BLOCKS OF THE DIGITAL SIGNAL BY ONE TRANSFORMING ELEMENT, WHEREIN THE TRANSFORMING ELEMENT CORRESPONDS TO A BLOCK-DIAGONAL MATRIX COMPRISING TWO SUB-MATRICES, WHEREIN EACH SUB-MATRIX COMPRISES THE TRANSFORMATION MATRIX AND THE TRANSFORMING ELEMENT COMPRISES A PLURALITY OF LIFTING STAGES AND WHEREIN EACH LIFTING STAGE COMPRISES THE PROCESSING OF BLOCKS OF THE DIGITAL SIGNAL BY AN AUXILIARY TRANSFORMATION AND BY A ROUNDING UNIT. |
