Title :
Properties of approximate Parks-McClellan filters
Author :
Lee, Li ; Oppenheim, Alan V.
Author_Institution :
Res. Lab. of Electron., MIT, Cambridge, MA, USA
Abstract :
It has been observed empirically that each coefficient in a Parks-McClellan filter converges to a steady state value as the filter length increases. This suggests the possibility of obtaining filters that are near optimal while “re-using” filter coefficients from shorter filters in the design of longer filters. In the context of approximate processing this then allows a filtering operation to be done in stages. This paper demonstrates this observation and examines some of its implications
Keywords :
FIR filters; approximation theory; convergence of numerical methods; delay circuits; digital filters; filtering theory; low-pass filters; signal processing; FIR filter design; Parks-McClellan filters; approximate processing; convergence; digital signal processing; filter coefficients; filtering operation; linear phase low-pass filters; Attenuation; Band pass filters; Filtering; Finite impulse response filter; Frequency; Laboratories; Low pass filters; Nonlinear filters; Passband; Signal processing algorithms;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on
Conference_Location :
Munich
Print_ISBN :
0-8186-7919-0
DOI :
10.1109/ICASSP.1997.599477
