LINEAR-PROGRAMMING DESIGN OF FIR RAISED COSINE FILTERS WITH GREATER-THAN-100-PERCENT EXCESS BANDWIDTH

The authors describe a design method for realising FIR linear phase ra ised cosine filters with >100% excess bandwidth. Using linear programm ing, the method approximates the ideal filter response in the frequenc y domain while ensuring zero intersymbol interference (ISI) in the tim e domain. II is shown that the method is capable of generating designs closely matching the ideal raised cosine response; As an example, the design of a 21-tap FIR filler with a roll-off factor of 1.2 is includ ed.