IMPLEMENTING CONTINUOUSLY PROGRAMMABLE DIGITAL FILTERS W/THE TMS320C30/40 DSP

Systems engineers must apply real-time digital hardware solutions to signal processing problems to achieve the goals of reliability, repeatability, and flexibility. DSP offers the only such solution for many applications.

Digital filter components are an integral part of many DSP systems. In particular, continuously programmable digital filters (CPDFs) offer a broad range of high-tech applications, such as optimal filter implementations, Kalman filter design, adaptive system operation, and even the simulation or implementation of linear, time-varying, and nonlinear systems.

This application report describes the implementation of a general purpose CPDF on a Texas Instruments (TIÔ) TMS320C30/40 development board(s) using optimized coefficient updating algorithms. The performance of a dual-processor design is evaluated for coefficient updating and processing rates as a function of CPDF complexity. As a result, analysts can determine the design limitations for any application. The CPDF implementations presented in this design include IIR filters that are guaranteed to be stable, a major advancement in CPDF design.

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