FREQUENCY RECONFIGURABLE DIGITAL FILTER AND FILTER DESIGN METHOD

摘要

Disclosed are a digital filter and a filter design method capable of frequency reconstruction. The disclosed filter design method includes the steps of (a) generating a plurality of multi-images repeated at regular intervals for a baseband filter response; (B) generating a plurality of multi-complementary images which are repeated with the predetermined period in a frequency region in which the multi-images are not generated; (C) selecting at least one of the multi-complementary image and an image corresponding to a selected band of the multi-image; (D) generating a filter response corresponding to the selected image. According to the present invention, frequency reconstruction is possible to have various band pass characteristics without changing hardware, frequency reconstruction is possible to have various band pass characteristics with only a small number of parameter changes, and a user can easily filter a band. There is an advantage that can be reconstructed through a plurality of image combinations to change the.