Design of NPR-Type Cosine Modulated Filterbank Using Combinational Window Functions

This paper presents the design of near perfect reconstruction (NPR) cosine modulated filterbank (CMFB). The prototype filter is designed by the combinational window functions. These window functions provide high side-lobe-fall-off-rate (SLFOR) with better far-end attenuation which suppresses the undesired interferences occur in the filterbank. A linear optimization is used to minimize the error parameters. Design examples have been included to illustrate the effectiveness of the proposed technique over the earlier reported work.