Filters using the ST10 DSP library

An ST10 DSP software library developed by STMicroelectronics contains a set of basic arithmetic operations such as multiplication as well as two main filter functions, FIR and infinite impulse response (IIR), mainly used in digital signal processing. The first chapter of this application note describes a theoretical digital implementation of four different filters: low-pass filter, high-pass filter, passband filter and cut-band filter.

The method adopted for each filter is the approximation of the ideal filter model by a FIR filter. This theory aims to compute the FIR's coefficients by truncating the real signal with a known window. The second chapter illustrates a practical implementation of a low-pass filter using the ST10 DSP library, its results and its limitations.

View the PDF document for more information.