Design of Computationally Efficient FIR Filters Using Periodic Subfilters as Building Blocks
نویسنده
چکیده
For many digital signal processing applications, FIR filters are preferred over their IIR counterparts as the former can be designed with exactly linear phase and they are free of stability problems and limit cycle oscillations. The major drawback of FIR filters is that they require, especially in applications demanding narrow transition bands, considerably more arithmetic operations and hardware components than do comparable IIR filters. Ignoring the correction term for very low-order filters, the minimum order of an optimum linear-phase lowpass FIR filter can be approximated by [Herrmann, Rabiner, and Chan, 1973]
منابع مشابه
Design and Efficient Implementation of Single Filter Frequency-response Masking Fir Filters
ABSTRACT In this paper single filter frequency-response masking FIR filters are introduced. The filters are based on the frequency-response masking approach, where the masking filters are replaced by instances of the same model filter, but with different periodicity. By having identical subfilters, except for periodicity, it is possible to map all subfilters to a single hardware structure using...
متن کاملOn Adjustable Fractional Delay FIR Filters and Their Design
This paper considers adjustable fractional delay FIR filters and their design. We employ a filter structure that in [1] is referred to as the modified Farrow structure. This structure makes use of a number of linearphase FIR subfilters. In [1], all subfilters are of odd and equal order. In this paper, we consider the case where the subfilters in general have different orders, which results in a...
متن کاملEfficient and Multiplierless Design of FIR Filters with Very Sharp Cutoff via Maximally Flat Building Blocks
Ahsrract -A new design technique for linear-phase FIR filters, based on maximally flat building blocks, is presented. The design technique does not involve iterative approximations and is, therefore, fast. It gives rise to filters that have a monotone stopband response, as required in some applications. The technique is partially based on an interpolative scheme. Implementation of the obtained ...
متن کاملA class of complementary IIR filters
A class of complementary IIR filters is introduced. One of these filters can be realized as a tapped cascaded interconnection of identical allpass subfilters. The complementary filter is then obtained automatically by adding some extra allpass subfilters and a subtractor. The proposed filters are always allpass complementary and, under certain conditions, also magnitude complementary. Further, ...
متن کاملOptimization Of Frequency-Response Masking Based Fir Filters
A very efficient technique to drastically reduce the number of multipliers and adders in implementing linear-phase finite-impulse response (FIR) digital filters in applications demanding a narrow transition band is to use the frequency-response masking (FRM) approach originally introduced by Lim. The arithmetic complexity can be even further reduced using a common filter part for constructing t...
متن کامل