Optimized Cosine-Modulated Filter Banks Using the Frequency Response Masking Approach
M.B. Furtado, Sergio Lima Netto, Paulo S. R. Diniz · Anais do 2002 International Telecommunications Symposium · 2002
An optimization procedure for cosine-modulated filter banks (CMFB) using the frequency-response masking approach is proposed.In the given method, we perform minimization of the maximum attenuation level in the filter's stopband, subject to intersymbol interference (ISI) and intercarrier interference (ICI) constraints.For optimization, a quasi-Newton algorithm with line search is used, and we propose a simplified analytical expressions to impose the interference constraints.The result is lower levels of ISI and ICI for a pre-determined filter order, or reduced filter complexity for given levels of interferences.