A design flow for linear-phase fixed-point FIR filters: from the NPRM specifications to a VHDL code
نویسندگان
چکیده
This work combines two distinct research efforts, the coefficient design and the adder-number reduction, of fixed-point FIR filters into an automatic design flow. Given the normalized peak-ripplemagnitude (NPRM) specifications, the canonic-signed-digit (CSD) filter coefficients are calculated by the partial mixed-integer-linearprogramming (PMILP) algorithm. Then a signed common subexpression sharing (SCSS) algorithm is used to reduce the number of adders required to implement the FIR filter. Finally a VHDL code that describes the FIR filter hardware with SCSS is generated.
منابع مشابه
Design and Implementation of Equiripple FIR Lowpass Filter on FPGA: A Case Study
This paper demonstrates the design and implementation of Equiripple linear-phase FIR lowpass filter. The filter is modeled using Simulink in Xilinx System Generator. The filter Coefficients are generated with the help of FDA tools, and the System Generator tool is used for RTL code generation. Further the model is used as a filter block to interface with ADC-DAC block in VHDL. The design has be...
متن کاملLow latency IIR digital filter design by using metaheuristic optimization algorithms
Filters are particularly important class of LTI systems. Digital filters have great impact on modern signal processing due to their programmability, reusability, and capacity to reduce noise to a satisfactory level. From the past few decades, IIR digital filter design is an important research field. Design of an IIR digital filter with desired specifications leads to a no convex optimization pr...
متن کاملRound-off error-free fixed-point design of polynomial FIR predictors and predictive FIR differentiators
In this report, we present a novel method for designing polynomial FIR predictors (PFP) and polynomialpredictive FIR differentiators (PPFD) for fixed-point environments. Our method yields filters that perform exact prediction and differentiation even with short coefficient word lengths. Under ordinary coefficient truncation or rounding, prediction and differentiation capabilities of these filte...
متن کاملTwo Novel Implementations of the Remez Multiple Exchange Algorithm for Optimum FIR Filter Design
One of the main advantages of the linear-phase FIR filters over their IIR counterparts is the fact that there exist efficient algorithms for optimizing the arbitrary-magnitude FIR filters in the minimax sense. In case of IIR filters, the design of arbitrary-magnitude filters is usually time-consuming and the convergence to the optimum solution is not always guaranteed. The most efficient method...
متن کاملWave Digital Filtering Using the MSP430
Digital filtering is an integral part of many digital signal processing algorithms. Digital filters are characterized as either recursive [infinite impulse response (IIR)] or non-recursive [finite impulse response (FIR)] filters. IIR filters require a smaller order for the same set of specifications compared to FIR filters, while FIR filters provide a linear phase property. However, IIR filters...
متن کامل