Abstract
Digital filter in digital signal processing of various plays very important role in design, digital filter is an important research field of signal processing. Common digital filter has FIR filters and IIR filter, including IIR digital filter is occupied by simple structure, less storage space, faster, higher precision and can be used for realization of low frequency characteristics choose good characteristics [1], the widely used. DSP is suitable for digital signal processing software and hardware resources, is the resource of the realization of digital signal processing is an important way to [2]. Currently, most of which saw filters, model design results in MATLAB simulation experimental environment etc, with great limitations. Based on DSP IIR discussion on digital filter, and the realization of its realization methods are analyzed. This paper describes the design principle of IIR digital filter and the realization of digital signal processor (DSP), and the realization of digital filtering IIR DSP methods are analyzed. MATLAB IIR calculated the digital filter coefficients, considering the overflow problems, using a cascade of filter decomposition, finally realized in the TMS320VC5416 DSP and come by CCS (composer studio) input and output functions and RTDX (real data exchange) - time function ensure the consistency of the results and simulation results.
