EFFICIENT DESIGN OF NARROWBAND COSINE-MODULATED FILTER BANKS USING A TWO-STAGE FREQUENCY-RESPONSE MASKING APPROACH

SERGIO L. NETTO, LUIZ C. R. de BARCELLOS, PAULO S. R. DINIZ
2003 Journal of Circuits, Systems and Computers  
A new cosine-modulated filter bank (CMFB) structure is proposed based on the frequency-response masking (FRM) approach using masking filter decomposition. The resulting structure, the so-called FRM2-CMFB, presents reasonable computational complexity (number of arithmetic operations per output sample) and allows one to design filter banks with extremely large number of bands. The examples include the use of M = 1024 bands, where the standard minimax method cannot be employed. These examples
more » ... These examples indicate that the reduction in computational complexity can be as high as 60% of the original FRM-CMFB structure, which does not use masking filter decomposition.
doi:10.1142/s0218126603001057 fatcat:vdmbqrvt5rbrfmyxtpjkbkhbd4