Participant : Fabien Seyfert.
Status: A stable version is maintained.
This software has been developed by Vincent Lunot (Taiwan Univ.) during his Ph.d. He still continues to maintain it.
EasyFF is a software dedicated to the computation of complex, and in particular multi-band, filtering functions. The software takes as input, specifications on the modulus of the scattering matrix (transmission and rejection), the filter's order and the number of transmission zeros. The output is an "optimal" filtering characteristic in the sense that it is the solution of an associated min-max Zolotarev problem. Computations are based on a Remez-type algorithm (if transmission zeros are fixed) or on linear programming techniques if transmission zeros are part of the optimization  .