Patent ID: 8949303
Filing Date: 2015-02-03
Classification: H03H

Abstract:
1. A filter for providing desired characteristics, the filter comprising a combination of a plurality of scaled filters, where said scaled filters are formed by scaling at least one basic filter in the time domain or the frequency domain, wherein said at least one basic filter comprises at least one of a basic low-pass filter and a basic high-pass filter, wherein said at least one basic filter has an impulse response function expressed by a finite piecewise polynomial and wherein said at least one basic filter has a filter coefficient which is derived from a sample point of said impulse response function; wherein said combination of the plurality of scaled filters is selected such that a passband width of said combination is larger than or equal to a predetermined range; and wherein the combination of the plurality of scaled filters is configured to form a passband filter and a stopband filter, wherein said formed pastband filter has passband characteristics satisfying predetermined required characteristics and wherein said formed stopband filter has stopband characteristics satisfy predetermined required characteristics.