Coefficient Quantization Error Free Fixed-point Iir Polynomial Predictor Design
نویسنده
چکیده
In this paper, roundoff noise properties of fixed-point IIR polynomial predictors (FIPPs) and polynomial-predictive differentiators (FIPPDs) are investigated. These filters are designed by augmenting the corresponding FIR basis filters with magnitude response shaping feedbacks. Here we use ideally quantized coefficient (coefficient quantization error free) polynomial FIR predictors (PFPs) or predictive differentiators (PPFDs) as basis filters. Also, sufficient conditions for designing coefficient quantization error free direct form FIPPs are given for completeness, even though augmented FIR implementations of FIPPs and FIPPDs are preferred since they are coefficient quantization error free by their nature, and offer greater flexibility for magnitude response shaping without affecting the desired group delay properties set forth by the underlying PFP or PPFD.
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