Digital filters can be a valuable tool in an engineer's tool box. Properly applied, SNR improvements can be achieved that surpass those attained by analog techniques. Yet one can not simply throw a digital solution in place without understanding the underlying principles and concepts. Thus if digital engineers are to utilize these techniques, they had better be prepared to become versed in the mathematics that used to be reserved for analog engineers.
As a courtesy to those readers interested, a "cookbook" software package to compute filter coefficients using the Remez Exchange Algorithm is available, free of charge from the author. The windows based software may be downloaded from our site.Digital filter Program Download
Digital Filter Designers Handbook, C. Britton Rorabaugh, McGraw Hill, 1993
C Language Algorithms For Digital Signal Processing, Paul Embree, Bruce Kimble, Prentice Hall, 1991