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Recently, it has been observed that the complexity of finite-impulse-response (FIR) filters using the frequency-response masking technique can be significantly reduced by simultaneously optimizing all the subfilters. In order to reduce the filter complexity even further, this paper considers the optimization a class of FIR filters based on the use of the generalized frequency-response masking approach originally introduced by Lim and Lian (see IEEE Trans. Circuits Syst. II, vol. 41, p. 518-525, Aug. 1994). For this class of filters, the two masking filters are constructed by using a common filter part. Again, the simultaneous optimization of all the subfilters is used, resulting in a considerable reduction in the overall filter complexity. An example taken from the literature illustrates the benefits of the proposed approach.
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on (Volume:3 )
Date of Conference: 2002