The power-saving matched filter by preliminary calculation

摘要

Taking the correlation between the digital codes of one and the predetermined sequence (57) of one of the [Abstract] signal sample value to generate a correlation value relating to the shift of the signal sample value sequence relative to the code to a predetermined way. This method was chosen plurality by forming a plurality of sets of preliminary combinations by combining subgroups of the signal sample values ​​in the sequence to select the preliminary combination one from each set of preliminary combined and then It is achieved by providing a preliminary combination. Then, by adding or subtracting the preliminary combination chosen of multiple, thereby generating a correlation value corresponding to the shift of the signal samples in series.