Recent Advances in Variable Digital Filters [chapter]

Shunsuke Koshita, Masahide Abe, Masayuki Kawamata
2018 Digital Systems  
Variable digital filters are widely used in a number of applications of signal processing because of their capability of self-tuning frequency characteristics such as the cutoff frequency and the bandwidth. This chapter introduces recent advances on variable digital filters, focusing on the problems of design and realization, and application to adaptive filtering. In the topic on design and realization, we address two major approaches: one is the frequency transformation and the other is the
more » ... the other is the multi-dimensional polynomial approximation of filter coefficients. In the topic on adaptive filtering, we introduce the details of adaptive bandpass/band-stop filtering that include the well-known adaptive notch filtering.
doi:10.5772/intechopen.79198 fatcat:3isab2wi4fdhtmjm7aybvrut7q