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The optimization of fixed coefficient FIR filter implementation has been focused mainly on the multiplier block where full precision fixed point arithmetic is normally used. Recently, an optimization method was proposed for the structural adders in FIR filters. This paper further proposes a method for gradually reducing the number of fractional bits within the structural adder block such that the...
This paper proposes a method to design low-delay fractional delay (FD) filters, using the Farrow structure. The proposed method employs both linear-phase and nonlinear-phase finite-length impulse response (FIR) subfilters. This is in contrast to conventional methods that utilize only nonlinear-phase FIR subfilters. Two design cases are considered. The first case uses nonlinear-phase FIR filters in...
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